Prevention of Insomnia Using a Stepped Care Model in Adults

Study Overview
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Brief Summary
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Insomnia is one of the most common sleep disorders and affects approximately 10 - 40% of the population across different age groups in Hong Kong. Our previous study has shown that insomnia can be prevented through a brief cognitive behavioral prevention program in adolescents. However, there is very limited data in the adult population. Current study aims to evaluate a digital sleep-focused platform which consists of different intervention plan according to user's insomnia severity level and employed a stepped care model. Thus, the effectiveness of the stepped care model will be evaluated in a real world setting using stepped wedge cluster randomized controlled design to evaluate potential preventive effect on adults who only with mild insomnia symptoms. The program will be rolled out to different districts in Hong Kong sequentially in 18 districts over 4 steps with a equally spaced time periods. The primary aim of this study is to evaluate the effects of a stepped-care CBT-I model in improving sleep and prevent the incidence of insomnia among participants with mild insomnia.

Detailed Description
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This interventional study will be a multicenter, assessor-blinded, pragmatic stepped-wedge cluster randomized controlled trial. A total of 18 districts will be included in the study and the randomization will be carried out based on the districts. The stepped-care CBT-I intervention will be sequentially rolled out to the 4-6 districts per step according to a computer-generated random number while the remaining clusters will continue to stay unexposed to the CBT-I intervention over the control period. Therefore after 4-step exposure, all clusters will receive the stepped-care CBT-I intervention. A total of 3 follow-up assessments (post intervention, 3-month and 12-month follow up) will be conducted to assess the effectiveness and long-term effects of the stepped care model.

Official Title
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Prevention of Insomnia Using a Stepped Care Model in Adults: a Pragmatic Stepped-wedge Cluster Randomized Trial

Conditions
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Sleep Disturbance

Intervention / Treatment
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* Behavioral: Cognitive behavioral prevention program for insomnia (CBP-I)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Chinese adults aged 18-70 years old, The score of Insomnia Severity Index < 10. Exclusion Criteria: present with psychotic disorders such as bipolar disorder and schizophrenia, present with severe depression or suicidal ideation, present with neurodegenerative diseases that prevent participant from completing the intervention (e.g., dementia and Parkinson's disease). unable to provide consent

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Crossover Assignment
Interventional Model Description: Pragmatic stepped wedge design - over 4 months, 18 sites enter trial at 1 month intervals.
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Stepped-care CBT-I group<br>A total of 3 steps of sleep focused intervention will be provided, with the objectives to increase the awareness of sleep health, increase sleep literacy, establish good sleep hygiene and treat insomnia. Step 1: self-help digital sleep focused program; Step 2: guided intervention; Step 3: individualized consultation. | Behavioral: Cognitive behavioral prevention program for insomnia (CBP-I)<br>* CBP-I will be provided to participants once their districts are exposed.<br>|
| No Intervention: Control group<br>Participants in the control group remain unexposed to the stepped-care sleep-focused intervention. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Insomnia severity index | The primary outcome will be the perceived insomnia severity measured by Insomnia Severity Index (ISI). | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month postintervention and 12-month post-intervention follow up | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Severity of depression | Patient Health Questionnaire-9 (PHQ-9) will be used to measure the severity of depression. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Severity of anxiety | General Anxiety Disorder-7 (GAD-7) will be used to measure the severity of anxiety. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Health-related quality of life | The health-related quality of life (HRQoL) will be measured by the EuroQol-5D (EQ). | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Chronic insomnia diagnosis | A checklist based on Diagnostic and statistical manual of mental disorders will be implemented to measure the incidence of chronic insomnia. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Medication usage | A checklist will be used to measure the subject's medication usage change. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Clinical global impression | Clinical Global Impression (CGI) will be used to assess the insomnia severity over time. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Patient-report clinical global impression | A single-item CGI will be used to ask the participant whether they experience sleep improvement or change over the past week or not. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Sleep duration | Two self-report questions will be used to record the sleep duration during weekdays and weekends of the participants. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Subjective sleep as measured by sleep diary | Self-report sleep diary will be used to record subjective sleep of the participants including total time in bed, sleep onset latency, total sleep duration, sleep efficiency and wake after sleep onset. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Healthcare resource use | The use and expense of sleep-promoting medication, psychotherapy, and other complementary treatments for sleep improvement will be collected from individual participants using a self-developed questionnaire, with a focus on their healthcare resource utilization. | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 
| Work and social functioning | A 5-item questionnaire developed from Work and Social Adjustment Scale (WSAS) will be used to measure the daytime functioning of the participants such as ability to work, home management, social and private leisure activities, and close relationship maintenance | Post-intervention (ranging from 8 weeks to 24 weeks, depending on the treatment level), 3-month post-intervention and 12-month post-intervention follow up | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Sleep Disturbance, Stepped care model, Stepped wedge cluster randomized trial, Prevention program