# The ICU-Diary study: prospective, multicenter comparative study of the impact of an ICU diary on the wellbeing of patients and families in French ICUs

Maïté Garrouste-Orgeas, Cécile Flahault, Léonor Fasse, Stéphane Ruckly, Nora Amdjar-Badidi, Laurent Argaud, Julio Badie, Amélie Bazire, Naike Bige, Eric Boulet, et al.

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## ► To cite this version:

Maïté Garrouste-Orgeas, Cécile Flahault, Léonor Fasse, Stéphane Ruckly, Nora Amdjar-Badidi, et al. The ICU-Diary study: prospective, multicenter comparative study of the impact of an ICU diary on the wellbeing of patients and families in French ICUs. Trials, 2017, 18 (1), pp.542. 10.1186/s13063-017-2283-y. [https://hal.science/hal-04595651](https://hal.science/hal-04595651)

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# The ICU-Diary study: prospective, multicenter comparative study of the impact of an ICU diary on the wellbeing of patients and families in French ICUs

Maïté Garrouste-Orgeas<fnref n="1" />,<fnref n="2" />,³*, Cécile Flahault⁴, Léonor Fasse⁵, Stéphane Ruckly<fnref n="1" />,<fnref n="2" />, Nora Amdjar-Badidi⁶,
Laurent Argaud⁷, Julio Badie⁸, Amélie Bazire⁹, Naike Bige¹⁰, Eric Boulet¹¹, Lila Bouadma<fnref n="1" />,¹², Cédric Bretonnière¹³,¹⁴,
Bernard Floccard¹⁵, Alain Gaffinel¹⁶, Xavier de Forceville¹⁷, Hubert Grand¹⁸, Rebecca Halidfar¹⁹, Olfa Hamzaoui²⁰,
Mercé Jourdain²¹,²², Paul-Henri Jost²³, Eric Kipnis²⁴, Audrey Large²⁵, Alexandre Lautrette²⁶,²⁷, Olivier Lesieur²⁸,²⁹,
Virginie Maxime³⁰, Emmanuelle Mercier³¹, Jean Paul Mira³², Yannick Monseau³³, Erika Parmentier-Decrucq²²,
Jean-Philippe Rigaud³⁴, Antoine Rouget³⁵, François Santoli³⁶, Georges Simon³⁷, Fabienne Tamion³⁸,³⁹,
Nathalie Thieulot-Rolin⁴⁰, Marina Thirion⁴¹, Sandrine Valade⁴², Isabelle Vinatier⁴³, Christel Vioulac⁴,
Sebastien Bailly<fnref n="1" /> and Jean-François Timsit<fnref n="1" />,<fnref n="2" />,¹²

Abstract

**Background:** Post-intensive care syndrome includes the multiple consequences of an intensive care unit (ICU) stay for patients and families. It has become a new challenge for intensivists. Prevention programs have been disappointing, except for ICU diaries, which report the patient's story in the ICU. However, the effectiveness of ICU diaries for patients and families is still controversial, as the interpretation of the results of previous studies was open to criticism hampering an expanded use of the diary. The primary objective of the study is to evaluate the post-traumatic stress syndrome in patients. The secondary objectives are to evaluate the post-traumatic stress syndrome in families, anxiety and depression symptoms in patients and families, and the recollected memories of patients. Endpoints will be evaluated 3 months after ICU discharge or death.

(Continued on next page)

<footnote>* Correspondence: maite.garrouste@ihfb.org</footnote>

<footnote n="1">¹Infection, Antimicrobials, Modelling, Evolution (IAME), UMR 1137, INSERM and Paris Diderot University, Department of Biostatistics – HUPNVS – AP-HP, UFR de Médecine – Bichat University Hospital, Paris, France</footnote>

<footnote n="2">²Department of Biostatistics, Outcomerea, Paris, France
Full list of author information is available at the end of the article</footnote>
(Continued from previous page)

**Methods:** A prospective, multicenter, randomized, assessor-blind comparative study of the effect of an ICU diary on patients and families. We will compare two groups: one group with an ICU diary written by staff and family and given to the patient at ICU discharge or to the family in case of death, and a control group without any ICU diary. Each of the 35 participating centers will include 20 patients having at least one family member who will likely visit the patient during their ICU stay. Patients must be ventilated within 48 h after ICU admission and not have any previous chronic neurologic or acute condition responsible for cognitive impairments that would hamper their participation in a phone interview. Three months after ICU discharge or death of the patient, a psychologist will contact the patient and family by phone. Post-traumatic stress syndrome will be evaluated using the Impact of Events Scale-Revised questionnaire, anxiety and depression symptoms using the Hospital Anxiety and Depression Scale questionnaire, both in patients and families, and memory recollection using the ICU Memory Tool Questionnaire in patients. The content of a randomized sample of diaries of each center will be analyzed using a grid. An interview of the patients in the intervention arm will be conducted 6 months after ICU discharge to analyze in depth how they use the diary.

**Discussion:** This study will provide new insights on the impact of ICU diaries on post-traumatic stress disorders in patients and families after an ICU stay.

**Trial registration:** ClinicalTrials.gov, ID: NCT02519725. Registered on 13 July 2015.

**Keywords:** ICU diary, Intensive care unit, Stress disorders, post-traumatic, Family, Anxiety, Depression

## Background

Hospitalization in an intensive care unit (ICU) is a stressful experience for both patients and families, as they are facing an unknown environment, diagnostic and prognostic uncertainty, and possible fears of dying and of having an impaired quality of life. The progression of intensive care therapies is associated with decrease of in-ICU and in-hospital mortality [1-4]. However, this reduction in mortality is not the main criteria for the patients' and families' evaluation of their ICU stay, as the wishes of most survivors are to regain their personal and professional lives [5-7].

For several years, attention has been focused on the ICU being the origin of patients' and family's sequelae [8-10]. In 2012, a conference of stakeholders representing key organizations and groups of North America described the “post-intensive care syndrome” (PICS) as including physical, cognitive and psychological consequences of ICU stay for patients (PICS) and families (PICS-F) [11, 12]. Although there is a lack of basic scientific evidence enabling the understanding of the pathological mechanisms of post-ICU morbidity, experts agree on the importance of ICU events (hypoxia, shock, inflammation, glucose dysregulation), ICU treatments (use of benzodiazepines and other sedatives), and ICU conditions (bed immobilization, physical restraint, discomforts like noise, pain, thirst) [13]. Cognitive impairments can persist in 30 to 80% of patients. More than 6 months after hospital discharge, anxiety, depression, and post-traumatic stress-related syndrome (PTSD) are described in 8-57%, 23-48%, and 10-50% of patients, respectively [14]. Herridge et al. described four post-ICU disability stages based on age, duration of ICU stay and physical functional

dependency 1 week after ICU admission, without significant differences in cognitive status [15]. At 6 months, anxiety, depression symptoms, and PTSD were described in 15-24%, 5-36%, and 35-57% of the families, respectively [16]. To cope with these syndromes, 8 to 32% of families used medications after ICU admission; the ICU stay interfered with their lifestyle in half of them while they were caring of their relatives [16]. Most of ICU survivors required relative's assistance after their ICU stay, adding additional burden to their own life, especially depressive symptoms for up to 1 year [17]. These findings suggest that critical illness affects long-term outcome not only in patients but also in their relatives, increasing the effect of critical illness and societal burden. Some experts spoke about the “hidden public health disaster” [18]. Prevention programs are needed to limit these consequences.

Several prevention programs have focused on psychological consequences, and results were often disappointing [19-26]. Three types of prevention programs were evaluated: early in-ICU psychological interventions, post-ICU coping skill interventions through phone visits for outpatients, and ICU diaries. In a single, before-after study, the intervention of a psychologist for trauma patients providing stress support and coping strategies for management of anxiety, depression, PTSD, fear, and discomfort yielded a significant decrease in the PTSD syndrome [26]. Jones et al. included ventilated patients in a randomized controlled trial with blinded follow-up that evaluated an intervention associating a manual with recommendations of physical exercises, psychosocial and psychological advices, and thrice weekly phone calls reinforcing the use of the manual. This intervention showed conflicting results, with no effect on anxiety, depression or
PTSD, and a significant increase of quality of life up to 6 months [19]. In a single, small, randomized controlled study of 21 survivors, Jackson et al. showed that a cognitive, physical, and functional rehabilitation had an effect in improving cognitive performance [24]. As the studies are scarce and limited, the level of evidence for promoting these interventions is currently weak.

One of the explanations for the emotional troubles experienced by these patients is the lack of memories or the presence of delusional memories of their ICU stay [27, 28]. The intervention tested to fill the memory gap has been the ICU diary [29]. The ICU diary has been used for 30 years in North Europe and further extended to other European countries, North America, and Australia [30–32]. The diary is prospectively written in an everyday language and builds the patient’s story. It contains the reason of admission, a daily narrative of activity, and a conclusion before transferring the patient to the ward, or condolence for the family for the decedents. Every entry is signed and the diary may contain different numbers of entries. Entries are mainly made by the bedside nurse; families are encouraged to write in it; in some countries, physicians also participate to construct the patient’s story [22, 31, 33, 34]. Several studies explored the influence of the diary on the psychological consequences of the ICU stay on patients and families. A European randomized study included 372 patients with an ICU stay of more than 72 h, where half of them received the diary 1 month after ICU discharge. The onset of PTSD was reduced from 13 to 5% in the group of patients having received the diary [35]. A French single-center study including patients with an ICU stay of more than 96 h showed that the ICU diary was associated with a decrease of PTSD syndrome in patients and families 1 year after ICU discharge [22]. Some recent reports reviewed the impact of diaries on patient’s recovery and yielded conflicting results due to methodological features [36–38]. Studies of impact were single-center studies [20, 22], with different patient case-mix [22, 39], and those where diaries were written by different categories of caregivers. The evaluation of the impact, and the methodology used (qualitative or quantitative) differed between studies [21, 40, 41]. These differences did not recommend the use of a diary in routine clinical practice.

These findings prompted us to design the ICU-Diary study to overcome these limitations and clarify the impact of an ICU diary on patients and families.

## Methods

### Study design

The ICU-Diary study is a multicenter, randomized, parallel (allocation ratio 1:1), and controlled study to assess the impact of the ICU diary on the wellbeing of both patients and families. We designed a quantitative study to

assess the psychological effect of the diary and a qualitative study to examine how the patient used his diary 6 months after ICU discharge. The study was not blinded for the ICU staff but assessment was blinded for the psychologist processing the follow-up. The study timeline and schedule of enrollment, interventions, and assessments is presented in Fig. 1. The Standard Protocol Items: Recommendations for Interventional Trials (SPIRIT) Checklist is provided in Additional file 1.

## Aims

The primary objective is to evaluate the PTSD in patients 3 months after ICU discharge as measured by the Impact Event Scale-Revised questionnaire (IES-R). The IES-R is a validated and reliable tool for the evaluation of PTSD symptoms of intrusion, avoidance, and hyperarousal [42]. Each item is scored on a 5-point Likert-type scale (0, not at all; 1, rarely; 2, occasionally, 3, fairly often; and 4, often). The total score can range from 0 (no symptoms) to 88 (severe symptoms). The main criteria of measurement will be the score of PTSD as having a low or high IES-R score, using 22 as the cutoff, as previously used in ICU studies [43].

The secondary objectives are to evaluate:

* The PTSD in families 3 months after ICU discharge, using the IES-R scale [42]. The criteria of measurement will be the score of PTSD as having a low or high IES-R score, using 22 as the cutoff, as previously used in ICU studies [43]

* Anxiety and depression symptoms in patients 3 months after ICU discharge

* Anxiety and depression symptoms families 3 months after ICU discharge. Symptoms of anxiety and depression are assessed using the validated French version of the self-administered Hospital Anxiety and Depression Scale (HADS), which has seven items on anxiety and seven on depression [44]. The sum for each domain ranges from 0 to 21. A score at 7 or below is considered normal. The cutoff score of 8 for each of the two subscales defines severe symptoms of anxiety or depression [45]

* The recollection of memories of the ICU stay by the patient 3 months after ICU discharge, as measured by the ICU Memory Tool Questionnaire [46]. The ICU Memory Tool Questionnaire consists of items exploring recollections of the patient before and during their ICU stay. It also includes two questions to assess if PTSD symptoms are present. As no French version exists, the ICU memory tool questionnaire was translated and back-translated into French by bilingual researchers, namely a French native who speaks English and an English native who speaks French
<table><caption>**Fig. 1** Study timeline, schedule of enrollment, interventions, and assessments</caption><thead><tr><th></th><th>Enrollment</th><th>Allocation</th><th colspan="2">Post allocation</th><th colspan="2">Follow-up</th></tr></thead><tbody><tr><td>Time points</td><td colspan="2">48 hours of ICU admission</td><td>ICU stay</td><td>ICU discharge</td><td>3-months</td><td>6-months</td></tr><tr><td>Enrolment</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Eligibility screen</td><td>X</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Inform consent</td><td>X</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Allocation</td><td>X</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Intervention</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>ICU diary</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>No ICU diary</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Assessment</td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Content analysis diary (randomized sample)</td><td></td><td></td><td>X</td><td></td><td></td><td></td></tr><tr><td>IES-R patient</td><td></td><td></td><td></td><td></td><td>X</td><td></td></tr><tr><td>HADS patient</td><td></td><td></td><td></td><td></td><td>X</td><td></td></tr><tr><td>Memory tool questionnaire patient</td><td></td><td></td><td></td><td></td><td>X</td><td></td></tr><tr><td>IES-R family</td><td></td><td></td><td></td><td></td><td>X</td><td></td></tr><tr><td>HADS family</td><td></td><td></td><td></td><td></td><td>X</td><td></td></tr><tr><td>Qualitative study (interview of the patient who have a diary)</td><td></td><td></td><td></td><td></td><td></td><td>X</td></tr></tbody></table>

### Diary content analysis

The content of a random sample of the study diaries will be analyzed with a grid (Table 1) that has already been published [22]. This grid was built with a panel comprising 11 members (three ICU physicians including two from other units, one ICU nurse, two psychologists, two hospital visiting volunteers, one person from the general population with a history of admission to another ICU, one former patient of our ICU, and his wife) using a Delphi technique. Six categories were defined and will serve for the analysis of the content of the diaries. We will report quantitatively the categories and themes which are represented most often in the diaries and will give verbatim examples for each of them.

* The way the patient uses the diary will be explored through a qualitative approach, analyzing semidirective interviews with the patients of the intervention arm, performed 6 months after the ICU discharge using thematic and interpretative phenomenological analysis.

Primary and secondary objectives are measured by a psychologist hired for the study. The psychologist will be blind to the randomization arm when they will phone

patients and families. If patients or a family member speak about the diary during the interview, the number of unblinded interviews will be reported in the study flow chart.

### Participants

#### Recruitment of ICUs

The participating ICUs belong to the French Society of Critical Care (SRLF) or the French Society of Anesthesiology (SFAR). The selection criteria were:

* Adult, medical, surgical or medical-surgical ICU patients

* Agreement of the whole team to write in the diaries

* Supervision of the study by physicians or nurses

* Agreement with the randomized design in the ICUs which previously used diaries

The participating ICUs are displayed in Additional file 2.

#### Recruitment of patients

Inclusion criteria are as follows:

* Age 18 years or older
<table><caption>**Table 1** Grid of analysis of the content of the intensive care unit (ICU) diary</caption><thead><tr><th></th><th></th></tr></thead><tbody><tr><td>Category 1: Defining places, spaces, and people</td><td>Theme 1 Narrative about the ICU and its location in the hospital and city<br>Theme 2 Narrative about the identity and job responsibilities of each ICU staff member<br>Theme 3 Narrative about the characteristics of the room<br>Theme 4 Narrative describing the pictures posted in the room<br>Theme 5 Narrative about the characteristics and purpose of the machines<br>Theme 6 Narrative about the sights and sounds in the room<br>Theme 7 Narrative about the presence of, or visits by, members of the clergy</td></tr><tr><td>Category 2: Building a time flow of medical events</td><td>Theme 1 Narrative about the patient's history before ICU admission and after the first urgent interventions<br>Theme 2 Narrative about the condition of the patient, clinical course, treatments, procedures, investigations, and surgeries<br>Theme 3 Description of events that interfered or might have interfered with the presence of ICU staff members at the bedside<br>Theme 4 Comments on life expectancy and the expected impact of the disorders on quality of life<br>Theme 5 Narrative describing exchanges among healthcare professionals involved with the patient: date of onset and content<br>Theme 6 Narrative about the differences in tasks carried out by the day staff and night staff, to explain how the 24-h cycle unfolds</td></tr><tr><td>Category 3: To replace the time flow of the patient's experience within the time flow of family, community, and world events</td><td>Theme 1 Narrative about events in the patient's personal life (narrator, family, friends ...)<br>Theme 2 Narrative about the difference in the perceived time flow of events between the patient since ICU admission and the narrator or family/friends<br>Theme 3 Narrative about future projects for the patient<br>Theme 4 Narrative about concomitant social, political, economic, and cultural events<br>Theme 5 Narrative about the visits, their sequence in time, their duration, and factors that prevented some visits from occurring</td></tr><tr><td>Category 4: To demonstrate the continuity of the patient's life</td><td>Theme 1 Narrative about the patient's recent or remote past, habits, reactions, and personality features<br>Theme 2 Narrative about the patient's behaviors, attitudes, and actions<br>Theme 3 Narrative about physical changes and attitudes (e.g., ability to open/close the eyes)<br>Theme 4 Narrative about changes in expressions of pain and responses to nursing care<br>Theme 5 Narrative about the patient's emotional responses to the voices of the staff and family/friends (smiling, small movements of the eyelids or body)<br>Theme 6 Narrative about the patient's emotional responses to physical contact (stroking, holding hands, touching ...)</td></tr></tbody></table>

<table><caption>**Table 1** Grid of analysis of the content of the intensive care unit (ICU) diary (Continued)</caption><thead><tr><th></th><th></th></tr></thead><tbody><tr><td>Category 5: To express feelings and emotions</td><td>Theme 1 Narrative that explicitly describes feelings or emotions about the patient<br>Theme 2 Narrative that explicitly describes feelings or emotions about or toward the ICU staff<br>Theme 3 Narrative that explicitly describes feelings or emotions of family members or other loved ones<br>Theme 4 Narrative describing expectations, fears, discouragement, and hopes of the family and other loved ones<br>Theme 5 Narrative describing the fears and hopes of the staff</td></tr><tr><td>Category 6: To explicitly demonstrate the presence, commitment, and support of staff and family</td><td>Theme 1 To write an account of one's presence at the patient's bedside<br>Theme 2 To make one's presence felt in a personal and original way (poems, songs, music, drawings ...)<br>Theme 3 To describe relationships between the patient and other persons while encouraging the other persons to speak to, and to touch, the patient, despite the unfavorable environment<br>Theme 4 To describe one's physical involvement in communicating with the patient<br>Theme 5 To describe or refer to one's support in the form of prayers or any other religious or spiritual activity</td></tr></tbody></table>

* Mechanical ventilation for more than 48 h and initiated within the first 48 h after ICU admission

* Patient having a family member speaking and understanding French, and with the ability to visit them during the ICU stay

* Subject consenting to participate in the study, or obtention of family consent in case of patient incompetency

Non-inclusion criteria are as follows:

* Patient without family available

* Patient or family not speaking or understanding French

* Current or previously neurologic conditions that would preclude questionnaire completion such as pre-existing psychotic or dementia-type illness, hospitalization after a cardiac arrest, acute neurologic diseases (meningitis, ischemic or hemorragic stroke), or cerebral trauma patients

* Patient status considered by the investigator to be inevitably leading to death or to withdrawal of life support within 48 h

* Patient already included in a study with interview follow-up

* Patient deprived of liberty

* Deaf and mute patients
## Intervention

The intervention is the elaboration of an ICU diary by caregivers and families. All the diaries for every center are built on the same way by the main investigator and given to the different centers before the beginning of the study. The first page is standardized and includes an explanation of the purpose of the diary; then the diary includes a picture of a typical patient's room with an explanation of the different devices possibly used during the stay, pictures of the unit, and a list of the main responsible persons of the unit. The diary is maintained by the family and by the ICU staff. The only instruction given to the families and staff members about diary entries is to refrain from writing about confidential matters that could not be shared among the patient, all relatives, and the staff. Staff members are free to express compassion and their hope, or absence thereof, that the patient would recover. Relatives can speak freely with the patients without guidance from the ICU staff. The first entry is written immediately after randomization by the ICU physician and includes a summary of the reason for admission, the name of the ICU and of the hospital, and a summary of the events of the first 48 h. Then, each day, a brief entry is mandatory during the whole ICU stay. This entry can be done by an ICU staff member whatever their category. Relatives are not encouraged to take photos of the patient during the whole stay without the patient's permission. No patient's photos taken during the ICU stay are allowed in the ICU diary, only pictures taken prior to the ICU stay (which were taken with the patient's authorization). For patients in the intervention arm, they received the ICU diary at the conclusion of their ICU stay when they are discharged to wards. If the patient dies, the diary is given to the family if they are present in the unit or sent by mail with an identical letter for all ICUs. A guide for the elaboration of the ICU diary was given to each center containing: rules for writing in the diary, indications for opening and maintaining the diary, for writing that the patient status does not fit well when the clinical patient status impaired, and for relinquishing the diary at ICU discharge. Examples of verbatim narratives of different categories of healthcare workers (ICU physician, resident, nurse, nursing assistant, physiotherapist) are included in the guide. World Health Organization Trial registration Data Set is provided in Additional file 3.

## Training

A training on the study will be performed for each center by the main investigator at the study initiation visit. A meeting is planned, enabling the supervisors of the study to discuss the training with the ICU staff. The study will be presented and the guide of how to fill in the diaries will be discussed. Examples of verbatim narratives will be provided. A free discussion will be organized

to address all potential difficulties for the ICU staff. The phone numbers of the main investigator (MGO) and of the two clinical researchers will be provided to each center for managing issues during the inclusion period. During the study period, the local co-investigator in each center is responsible for the supervision and promotion of the study, and supports the ICU staff for all potential difficulties for writing in the diaries.

## Arms

### Intervention arm

An ICU diary is opened by the ICU staff for the patient and their relatives at 48 h after ICU admission. It will be given to the patient at ICU discharge or to his family in case of death.

### Control arm

No diary is commenced during the ICU stay.

## Randomization

The 1:1 randomization is stratified by center and balanced with permutation blocks. Randomization is performed via a secure and dedicated website managed by the ICURE-search company. Family members or patients are randomized at 48 h after ICU admission if they fulfill all inclusion and non-inclusion criteria.

## Data collection

### ICU characteristics

The following ICU characteristics are recorded: hospital (university, community or private hospital), ICU (medical, surgical or medical-surgical), number of beds, structure of the unit (number of senior physicians and resident, nurse-to-patient ratio, nursing assistant-to-patient ratio).

### Patient characteristics

The following patient characteristics are recorded: demographics (sex, age); health status before ICU admission (Knaus [47] and McCabe [48] classification), health status at ICU admission using the Simplified Acute Physiology Score [49], type of admission (medical, scheduled surgical, or emergency surgical); use and duration in days of mechanical ventilation, of non-invasive ventilation, sedation duration, iatrogenic events, length of ICU stay. The date and limitation of treatments are also collected.

### Family characteristics

The following family characteristics are recorded: age, gender, relationship with the patient, educational level, professional status.

## Sample size justification

Post-traumatic stress-related syndrome was reported in 15% [35], 20.7% [50], 51% [19], and 64% [22] of patients
and in 29.8% [50], 42% [51], 49% [52], and 67% [22] of family members of ICU patients. We hypothesized that patient PTSD rate will be 40% in the control group and 26% in the intervention group. To detect such a difference between the two groups with a type 1 error of 0.05 and a power of 80%, it is necessary to interview 352 patients (176 in each group) at 3 months. At 3 months, considering a mortality rate of 40% and a cumulative rate of 50% of re-hospitalization or impossibility of interviewing the patient (refusal, sequelae or impossibility to join them), we will include 700 patients and their family member in the 35 centers. In each center, 20 patients will be included (10 in the intervention arm, i.e., with an ICU diary, and 10 in the control arm).

## Statistical analysis

### Outcome analysis

The analysis will be done according to the intention-to-treat principle. In each randomization group, we will report summary statistics according to the data (median and interquartile range, percentage with a 95% confidence interval).

The quantitative data will describe the patient's characteristics and the results of the psychological impact using the IES-R and HADS scales in the two arms. The impact of ICU diaries on PTSD will be assessed using a Mantel-Haenszel chi-square test.

A Kruskal-Wallis test will be used to compare quantitative secondary endpoint.

In case of disequilibrium of patient characteristics between groups, further multivariate analyses will be computed.

To explain the effect of patient state of health, family characteristics and patient PTSD on both anxiety and depression, an exploration of direct and indirect effect of

each variable on secondary outcomes will be performed using mediation analysis based on a structural equation model [53]. This approach consists of distinguishing measured variables which are indicators of unmeasured (latent) variables and exogenous variables which are exposure factors. Two steps will be performed: (1) an explanatory analysis to identify the latent variables and their measures and (2) the confirmatory analysis to assess direct or indirect relations between each latent variable. This second step is based on a conceptual model which clearly explains the relations between latent variables and their measures and defines the pathway between latent variables (Fig. 2). Because PTSD, anxiety, and depression will all be measured by a score, this approach will be more relevant to consider the different explicative factors. PTSD will be introduced as a latent variable to explain anxiety and depression [54, 55]. Finally, the center effect could be considered by introducing a hierarchical level in the mediation analysis. This point will be explored during the exploratory analysis.

All the analyses will be stratified by center. Data will be analyzed with the software SAS 9.4 (SAS Institute Inc., Cary, NC, USA). The results will be reported using the Consolidated Standards of Reporting Trials (CONSORT) criteria.

Figure 2 reports an example of a path diagram. Five latent variables are considered: (1) patient status of health, measured by ICU admission variables; this is supposed to impact the PTSD, but also anxiety and depression; (2) the ICU diary is considered here as a latent variable which can impact PTSD, anxiety and depression; (3) PTSD can have a direct effect on anxiety and depression; (4) anxiety, and (5) depression are the outcome and are considered inter-dependent. The model allows assessing

<figure><img src="image_4.png" /><figcaption>**Fig. 2** Example of a path diagram</figcaption></figure>
direct effect between latent variables but also indirect ef-
fect, such as the effect of the ICU diary on anxiety which
is mediated by PTSD.

Quantitative diary content analysis

The content of a random sample of the study diaries will
be analyzed with a grid (Table 1) already published [22].
This grid was build with a panel comprising 11 members
(three ICU physicians including two from other units,
one ICU nurse, two psychologists, two hospital visiting
volunteers, one person from the general population with
a history of admission to another ICU, one former pa-
tient of our ICU, and his wife) using a Delphi technique.
Six categories were defined and will serve for the ana-
lysis of the content of the diaries. We will report quanti-
tatively the categories and themes which are represented
most often in the diaries and will give examples of ver-
batim narratives for each of them.

Qualitative analysis of patient interviews

These interviews will be conducted in the intervention
arm and will describe how the patient uses their diary.
CV will conduct the patient interview by making direct
phone calls. Each interview will be audio-recorded, tran-
scripted verbatim, and qualitatively analyzed to capture
the subjective use of the diary by the patient. This quali-
tative analysis will be done by CF and LF. A large sample
of interviews will be subjected to the general inductive
approach [56] while the others will be subjected to an
interpretative phenomenological analysis [57] in order to
understand in depth the meaning-making processes of
the patients requiring intensive care.

Study management

The Steering Committee comprises two intensivists (MGO, JFT), three psychologists (CF, LF, and CV) and a biostatistician (SR). Three clinical research assistants completed the team. MGO visited all the centers and has trained the teams to write in the diaries. MGO and JFT are in charge of addressing any questions from the investigators and for checking inconsistencies. SR is in charge of the website and will analyze the quantitative data with JFT. CV will perform the interview with the patients and their families at 3 months, blind to the arm of randomization. CF and LF will be in charge of the qualitative analysis of the content of the diaries and of the interviews with the patients at 6 months. In each ICU, a local investigator (NAB, LA, JB, NB, EB, LB, CB, FC, BF, AG, XF, HG, RH, OH, MJ, EK, AL, OL, VM, EM, JPM, YM, EPD, AR, JPR, FS, GS, FT, NTR, MT, SV, and IV) participated in the reflection of the standardized ICU diary, is responsible for the continuous training of the new ICU staff hired during the study, and enrollment with inform consent of the patients and relatives.

The local investigators are responsible of the acquisition
of all study data and for sending all the study docu-
ments. Each local investigator is accountable for the ac-
curacy in ensuring that any part of the work and related
questions is appropriately resolved.

Discussion

With the development of the technical ICU, the preven-
tion of sequelae is an increasingly important health prob-
lem. Reducing the psychological consequences of the
post-intensive syndrome is one of the major challenges for
intensivists. This study should provide insights on the im-
pact of the ICU diary on post-traumatic consequences for
patients and for their families. This tool has no financial
cost, except the time offered by the caregivers to patients
and family for filling it in. Until now, the ICU diary has
been used in some ICUs, particularly those focused on
patient- and family centered care. If a positive effect of
the diary is demonstrated, it could be included in pro-
grams of patient- and family centered care in France
and in countries where ICU organization and health-
care worker to patient ratio is similar to that in France.

However, some issues related to this study design
should be discussed. First, the fact that the intervention
is not blinded for the healthcare workers should be con-
sidered in the results. Healthcare workers might provide
more support to patients and families in the diary group
because their relationship could be modified by the fact
of giving more time and more attention to the patient
and their family through the diary filling. However, the
limitation of 10 diaries by center should limit this
phenomenon, as each center should rarely have more
than one patient at once with a diary. Although the re-
sults of the study will not enable us to differentiate what
is important in a diary: the tool, the narrative or the rela-
tionship with the healthcare team. Nevertheless, we
chose to perform a content analysis by two psychologists
using a previously published grid. This will permit a
qualitative description of the diaries content, which will
contribute to explaining the results.

The fact that patients or families may mention their
diary during the interview and reveal their randomization
arm is another study limitation. However, such cases will
be noticed in the flow chart of the study. In addition,
this bias is limited by the fact that the interview will
use questionnaires focusing only on anxiety, depres-
sion, and post-traumatic symptoms. The questionnaire
about the memory recollection has not open questions
but only questions with some suggested answers. So it
is close question compared to open questions when the
patient can freely speak.

In conclusion, the results of this study are expected to
show a positive effect of an ICU diary written by
healthcare workers and families on the wellbeing of patients and families in the post-ICU period.

## Trial status

This trial is ongoing.

## Additional files

**Additional file 1:** SPIRIT 2013 Checklist: recommended items to address in a clinical trial protocol and related documents*. (DOC 121 kb)

**Additional file 2:** World Health Organization Trial Registration Data Set*. (XLSX 10 kb)

**Additional file 3:** Participants' centers. (DOCX 13 kb)

## Abbreviations

CCTIRS: Comité Consultatif sur les Traitements de l'Information en matière de Recherche dans le domaine de la Santé; CNIL: Commission Nationale de l'Informatique et des Libertés; CONSORT: Consolidated Standards of Reporting Trials; HADS: Hospital Anxiety and Depression Scale; ICU: Intensive care unit; IES-R: Impact of Event Scale-Revised; PICS: Post-intensive care syndrome; PICS-F: Post-intensive care syndrome-family

## Acknowledgements

We thank Celine Feger, MD (EMiBiotech), for her assistance in preparing the manuscript.

## Funding

This study received a grant from the Fondation de France, (contact Sophie Lasserre, 40 avenue Hoche, Paris, France), which had no role in the design, conduct or data analysis of the present study or in the decision to submit the manuscript for publication.

## Availability of data and materials

Not available

## Authors' contributions

MGO and JFT drafted the manuscript and contributed to the design of the study. CF and LF and CV contributed to the design of the study. CF and LF prepared the analysis for the content of the diaries and the qualitative analysis of the patient interview. CV conducted the patient interviews. SR and JFT prepared the statistical plan for the quantitative analysis. NAB, LA, JB, NB, EB, LB, CB, FC, BF, AG, XF, HG, RH, OH, MJ, EK, AL, OL, VM, EM, JPM, YM, EPD, AR, JPR, FS, GS, FT, NTR, MT, SV, and IV revised the protocol, were responsible of the implementation of the study in the centers (standardization of the ICU diary, training of the staff), are participating in the acquisition of the data and resolution of the queries, substantially contributed to revising the manuscript prior to submission and gave final approval of the manuscript. All authors have read and approved the final manuscript.

## Authors' information

Not applicable.

## Ethics approval and consent to participate

The study (#2015-A00700-49) was approved by the Ethics Committee of the Necker University hospital, Paris, France (2015-05-01-SC), the CNIL (Commission Nationale de l'Informatique et des Libertés; # HZB1693034n) and by the CCTIRS (Comité Consultatif sur les Traitements de l'Information en matière de Recherche dans le domaine de la Santé; # 15.1004). An amendment (2015-05-01 SC MC1) was obtained in February 2016 to increase the number of centers and of eligible patients. Written informed consent will be required from each participating family by the primary investigator. In accordance with French law, at ICU discharge, the main primary investigator will require the consent from the patient to use his information and to copy the diary. For the decedents, the consent for the analysis of the diary content will be required from the family.

To protect confidentiality, identification information will be delete from all study documents.

## Consent for publication

No applicable.

## Competing interests

The authors declare that they have no competing interests.

## Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

## Author details

¹Infection, Antimicrobials, Modelling, Evolution (IAME), UMR 1137, INSERM and Paris Diderot University, Department of Biostatistics – HUPNVS – AP-HP, UFR de Médecine – Bichat University Hospital, Paris, France. ²Department of Biostatistics, Outcomerea, Paris, France. ³Medical unit, French British Hospital Institute, Levallois-Perret, France. ⁴Psychology laboratory and work process, Paris Descartes University, Paris, France. ⁵Laboratoire Psy-DREPI EA-7458, Bourgogne Franche Comté University, Dijon, France. ⁶Medical-Surgical ICU, General Hospital René Dubos, Pontoise, France. ⁷Medical ICU, Edouard Herriot University Hospital, Lyon, France. ⁸Medical-Surgical ICU, General Hospital Belfort-Montbeliard, Belfort, France. ⁹Medical ICU, La Cavale Blanche University Hospital, Brest, France. ¹⁰Medical ICU, Saint Antoine University Hospital, Paris, France. ¹¹Medical ICU, Beaumont General Hospital, Beaumont, France. ¹²Medical ICU, Bichat University Hospital, Paris, France. ¹³Medical ICU, Nantes University Hospital, Nantes, France. ¹⁴EA3826, Laboratory of clinical and experimental therapeutics of infections, University of Nantes, Nantes, France. ¹⁵Medical ICU, Hospices Civils de Lyon, Edouard Herriot University Hospital, Lyon, France. ¹⁶Medical-Surgical ICU, Gustave Roussy Cancer Campus, Villejuif, France. ¹⁷Medical-Surgical ICU, Est Francilien Hospital network, Meaux, France. ¹⁸Medical-Surgical ICU, Hospital Robert Boulin, Libourne, France. ¹⁹Medical ICU, Albert Michallon University Hospital, Grenoble, France. ²⁰Medical ICU, University Hospital Paris-Sud, Be clère University Hospital, Clamart, France. ²¹Lille University, Inserm U1190, Lille, France. ²²Group of medical ICUs, Lille University Hospital, Lille, France.

²³Surgical ICU, Henri Mondor University Hospital, Créteil, France. ²⁴Surgical ICU, Lille University Hospital, Lille, France. ²⁵Medical ICU, François Mitterrand University Hospital, Dijon, France. ²⁶Medical ICU, Gabriel-Montpied University Hospital, Clermont Ferrand, France. ²⁷LMGE UMR CNRS 6023, University of Clermont-Ferrand, Clermont Ferrand, France. ²⁸Medical-Surgical ICU, General Hospital, La Rochelle, France. ²⁹EA 4569, University Paris Descartes, Paris, France. ³⁰Medical ICU, Raymond Poincaré University Hospital, Garches, France. ³¹CRICS group, Medical-Surgical ICU, Tours University Hospital, Tours, France. ³²Medical ICU, Cochin University Hospital, Paris, France.

³³Medical-Surgical ICU, General Hospital, Périgueux, France. ³⁴Department of Intensive Care, Dieppe General Hôpital, Dieppe, France. ³⁵Medical-Surgical ICU, Rangueil University Hospital, Toulouse, France. ³⁶Medical ICU, General Hospital Robert Ballanger, Aulnay-Sous-Bois, France. ³⁷Medical-Surgical ICU, General Hospital, Troyes, France. ³⁸Medical ICU, University medical center, Rouen, France. ³⁹INSERM U-1096, University of Rouen, Rouen, France.

⁴⁰Medical-Surgical ICU, General Hôpital, Melun, France. ⁴¹Medical-Surgical ICU, General Hospital Victor Dupouy, Argenteuil, France. ⁴²Medical ICU, Saint Louis University Hospital, Paris, France. ⁴³Medical ICU, Les Oudaries Hospital, La Roche-sur-Yon, France.

Received: 12 May 2017 Accepted: 24 October 2017

Published online: 15 November 2017

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