Sleeping For Two: Trial for CBT for Insomnia in Pregnancy

Study Overview
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Brief Summary
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Cognitive-behavioural therapy for insomnia (CBT-I) has been shown to be an effective treatment for insomnia in multiple populations, including women during pregnancy and postpartum. This randomized-controlled trial will compare the efficacy of CBT-I for pregnant women with insomnia to a treatment as usual group.

Detailed Description
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Sleep disturbances are common during pregnancy and typically worsen as pregnancy progresses.Treating antenatal insomnia with pharmacotherapy effectively improves sleep quality and confers a protective benefit against the onset of postpartum depression; however, data suggests that pregnant women are reluctant to take prescribed medications due to perception of risk. A large body of research has demonstrated that CBT-I has short-term efficacy equivalent to medication, while long-term results suggest that it outperforms medication. Despite the literature showing cognitive behavioural therapy for insomnia (CBT-I) to be effective in a variety of populations including postpartum women, and the demonstrated harmful consequences of sleep disturbances in late pregnancy, there have been few pilot studies examining the effectiveness of CBT-I in pregnancy, which was conducted by our group. Results suggested that CBT-I was effective and acceptable in reducing both objective and subjective indices of sleep quality and quantity of insomnia. These results are encouraging, and warrant larger investigations into the efficacy of CBT-I in pregnancy. Research Question and Objectives: The current proposal is an extension of a pilot study into a randomized design of in-person CBT-I compared to a treatment as usual (TAU) control for the treatment of insomnia experienced in pregnancy. The primary aim of the current project is to evaluate the impact of a 5-week in-person CBT-I versus a control group in reducing symptoms of insomnia (assessed subjectively by self-report and objectively with actigraphy) experienced in pregnancy. The investigators hypothesize that participants who receive a 5-week program CBT-I (versus TAU) will report fewer insomnia symptoms and have improved objectively assessed sleep as measured post-treatment.

Official Title
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A Randomized Controlled Trial of Cognitive Behavioural Therapy for Insomnia in Pregnancy

Conditions
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Insomnia, Sleep Disturbance

Intervention / Treatment
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* Behavioral: Cognitive Behavioural Therapy for Insomnia
* Other: Active Control


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: At or over the age of 18 Between 12 and 28 weeks pregnant Are able to read, write and speak in English Have a diagnosis of insomnia according to the DSM-V criteria. Exclusion Criteria: Experiencing symptoms of sleep disorders other than insomnia (i.e. restless legs syndrome [RLS], sleep-disordered breathing [SDB] Having a history of untreated, serious psychiatric illness (i.e., bipolar disorder, schizophrenia) Active suicidal ideation Currently taking prescribed medications for sleep problems Smoking, drinking alcohol or drug abuse during pregnancy Being pregnant with multiples Diagnosis of chronic pain.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cognitive-Behavioural Therapy Group<br>Participants receive 5 in-person weekly 1.5-hour sessions of cognitive-behavioural therapy for insomnia (CBT-I) for pregnant women, supervised by a registered, licensed clinical psychologist. | Behavioral: Cognitive Behavioural Therapy for Insomnia<br>* Cognitive behavioural therapy for insomnia (CBT-I) is an evidence-based psychotherapeutic intervention that combines cognitive and behavioural principles. Specifically, this therapy provides psychoeducation about thoughts contributing to the maintenance of sleep problems, and instruction in behavioural techniques to help decrease sleep onset latency and promote effective sleep maintenance.<br>|
| Active Comparator: Treatment as Usual Group<br>Participants receive usual obstetric care and are placed on a wait-list until six months postpartum. All activities or efforts participants make to treat or improve their sleep on their own is recorded and coded. After the final assessment six months postpartum, participants have the option of receiving 1.5-hour sessions (for a total of 5 session) of cognitive-behavioural therapy for insomnia (CBT-I) for pregnant women, supervised by a registered, licensed clinical psychologist. | Other: Active Control<br>* Participants will receive regular obstetric care and will be placed on a wait-list for CBT-I treatment after their final assessment. All activities women try for improving their own sleep problems between assessments will be recorded and coded for.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Insomnia Severity Index | The ISI is a 7-item questionnaire designed to identify cases of insomnia and evaluate treatment outcomes. The ISI assesses severity of sleep onset, sleep maintenance and early wakening problems, sleep dissatisfaction, and perceived distress caused by sleep problems. It was found to be a clinically useful tool in assessing changes in insomnia symptoms in insomnia treatment research. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up. | 
| Pittsburgh Sleep Quality Index | The PSQI instrument is used in assessing one's sleep quality during the previous month. It consists of 19 self-rated items and 5 questions rated by the roommate or bed partner. There are seven components of the PSQI and these are subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medications, and daytime dysfunction. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up. | 
| Actigraphy (Actiwatch II, Phillips, USA) - Circadian rhythm amplitude, acrophase, mesor | Actigraphy monitoring provides objective sleep data. The values for circadian rhythm amplitude, acrophase, and mesor will be combined for each participant to describe their full Circadian rhythm. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Actigraphy (Actiwatch II, Phillips, USA) - Sleep efficiency | Actigraphy monitoring provides objective sleep data. A sleep efficiency value is recorded by the actigrapher and will be reported. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Actigraphy (Actiwatch II, Phillips, USA) - Sleep latency | Actigraphy monitoring provides objective sleep data. A sleep latency value is recorded by the actigrapher and will be reported. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Actigraphy (Actiwatch II, Phillips, USA) - Total sleep time | Actigraphy monitoring provides objective sleep data. A total sleep time value is recorded by the actigrapher and will be reported. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Actigraphy (Actiwatch II, Phillips, USA) - Number and frequency of awakenings | Actigraphy monitoring provides objective sleep data. The number of times participants wake up during nighttime sleep is recorded by the actigrapher and will be reported. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Sleep Logs - Latency | Sleep logs provide self-reported subjective sleep. One of the variables participants will report is the amount of time they think it takes them to fall asleep. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Sleep Logs - Total sleep time | Sleep logs provide self-reported subjective sleep. Participants will be asked to report on their estimated total sleep time. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up | 
| Sleep Logs - Number and frequency of awakenings | Sleep logs provide self-reported subjective sleep. Participants will be asked to report on the number of times they woke up during nighttime sleep. | Change between 3 time-points: baseline, 7-week follow-up, 6-months postpartum follow-up |