Quality of Life of Patients With Desmoid-type Fibromatosis

Study Overview
=================
Brief Summary
-----------------
Rationale: Desmoid-type fibromatosis (DTF) is a rare, histologically benign, soft tissue tumour. Although incapable of metastasizing, the clinical course is unpredictable and can be aggressive because of local invasive growth. Various treatments are available including; surgical resection, radiotherapy, hormonal therapy and chemotherapy. Nowadays there is a trend towards a more conservative strategy with a wait and see policy because of high recurrence rates after surgical resection. Health-related quality of life (HRQL) is a corner stone in treatment choice and can be used during the disease for monitoring the impact of the disease on physical, psychological and social level. Additionally, HRQL can be in important endpoint for future clinical trials. Today, no HRQL-tools are available which capture the needs of DTF patients. The hypothesis is that patients with DTF have issues on several HRQL domains including physical, social and emotional well-being. For this reason we developed a list of items based on previous research. This study aims to evaluate HRQL issues experienced by DTF patients. Purpose: Multi-centre, cross-sectional, observational study to measure HRQL of DTF patients and to evaluate the prevalence of the experienced problems.

Detailed Description
-----------------
Objectives: The primary objective is to evaluate HRQoL problems in adult DTF patients. The secondary objectives are: 1) to compare the level of HRQoL of DTF patients to the general population, 2) to identify patient subgroups who are at risk for developing certain HRQoL problems, 3) to evaluate patient preferences regarding their health care needs for DTF. Outline: All patients, aged above 18 years, with a histopathological proved DTF tumour and sufficient Dutch language skills who have received their last check-up in the hospital within the last five years (April 2014). Patients treated in one of the participating centres, will be asked to fill out a set of questionnaires (baseline questionnaire, health care utilization, decision making, EORTC QLQ-C30, DTF-specific questionnaire, and the EQ-5D-5L). Patients will only have to fill out these questionnaires once.

Official Title
-----------------
The Evaluation of Health-related Quality of Life Issues Experienced by Patients With Desmoid-type Fibromatosis

Conditions
-----------------
Desmoid Tumor, Desmoid-type Fibromatosis

Intervention / Treatment
-----------------
* Other: Questionnaires


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Aged 18 years and older Histopathological proven DTF, regardless of disease stage or treatment. Diagnosed between January 1990 and July 2020, with a visit to the hospital for their DTF (between October 2014 and July 2020) Sufficient Dutch language skills Competent to complete a questionnaire Written informed consent Exclusion Criteria: • Familial adenomatous polyposis (FAP)

Ages Eligible for Study
-----------------
Minimum Age: 18 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Patients with histopathological proven DTF<br> | Other: Questionnaires<br>* - Baseline questionnaire, version 1.0, October 29 2019, (Dutch) - Health care utilization, version 1.0, October 29 2019, (Dutch) - Decision-making, version 1.0, October 29 2019, (Dutch) - EORTC QLQ-C30, version 3.0, (Dutch) - DTF-QoL, version 1.0, October<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| EORTC QLQ-C30 questionnaire (European Organisation for Research and Treatment of Cancer, Quality of Life Questionnaire-Core-30; version 3.0) | Each question will be scored: not at all (1), a little (2), quite a bit (3), very much (4). The scores of the EORTC-QLQ30 will be calculated using a Likert scale from 1-4. The scoring manual of the EORTC will be followed. After linear transformation, all scales and single item measures range in score from 0-100. Scores for each scale will be reported as mean (SD), or as median (IQR). A higher score on the functional scales and global quality of life means better functioning and HRQoL, whereas a higher score on the symptom scales means more complaints. The EORTC QLQ-C30 summary score will be calculated using the mean scores of the function scales and the reversed mean scores of the symptom scales and represented as the mean of the combined 13 QLQ-C30 scale scores (financial impact and global health status excluded). A higher summary score represented a better outcome. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 
| DTF-QoL questionnaire (Desmoid-type fibromatosis Quality of Life Questionnaire) | The scores for each item of the DTF-QoL will be calculated using a Likert scale from 1-4. The scores of each item will be calculated as mean ± SD, or as median (IQR). These scores (median or mean) will be reported per item. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 
| EQ-5D-5L questionnaire (EuroQol five-dimensional questionnaire; version 1.0) | Measures health-related quality of life on five dimensions of health: mobility, self-care, usual activities, pain-discomfort, and anxiety/depression. Additionally two questions aim to rank a patients' health (scale 0-100, with 100 representing a better health). Each of the five dimensions can be divided into five levels of perceived problems: no problems (level 1), slight problems (level 2), moderate problems (level 3), severe problems (level 4) and extreme problems (level). Health states can be converted into single index values. The outcomes will be reported as frequency (proportion) of reported problems for each level and for each dimension. The Visual Analogue Scale (VAS) data will be presented as a mean value (SD). In case of skewed data, median values and IQR will be used. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| EORTC QLQ-C30 questionnaire (European Organisation for Research and Treatment of Cancer, Quality of Life Questionnaire-Core-30; version 3.0) | See primary outcome 1 for a detailed description of the EORTC QLQ-C30 questionnaire. The median or mean values for each scale of the EORTC QLQ-C30 from DTF patients will be compared to the median or mean scores per scale of the general population. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 
| Baseline questionnaire (version 1.0) | Subgroups will be created based on the information of the baseline questionnaire and will encompass: sex (male, female), age groups (categorized based by the median age and/or quartiles), primary treatment type (surgical resection, systemic treatment, radiotherapy, local treatment (e.g. cryoablation), ethnicity, educational level, relationship status, job demands, comorbidities, tumour location, and tumour recurrences. Outcomes of this questionnaire will be descriptive and are expressed as numbers with corresponding percentages. Mean or median scores of each scale (EORTC QLQ-C30, version 3.0), items (DTF-QoL, version 1,0) or frequency scores (EQ-5D-5L, version 1,0) will be calculated for each relevant subgroup. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 
| Healt care utilization questionnaire (version 1.0) | The health care utilization questionnaire contains the following topics: satisfaction with received care, frequency of visits to the general practitioner / specialist, satisfaction with the follow-up schedule, preferences and needs for receiving care in a DTF expert centre, receiving additional care of support from professionals (medical and non-medical). Outcomes will be descriptive and reported in numbers and corresponding frequencies per answer option. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 
| Decision making questionnaire (version 1.0) | Six questions were designed to obtain information on how patients make medical decisions, what their current role is and what their preferred role, and one question regarding their awareness of their choices, the benefits and risks of certain treatment and whether they received support an advice are designed. Two questions were designed to gain insight into the reasons for choosing an active form of treatment. Outcomes of this questionnaire will be descriptive and expressed as numbers with corresponding percentages. | Participants have to fill out the questionnaire once and have to complete the questionnaire within 3 months after the invitation. A reminder for participation will be send one month after the initial invitation. | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Health-related quality of life, Quality of life