hiSG Sleep Health Study
Condition: Sleep
Study type: Interventional

Summary: 
      The hiSG Sleep Health Study seeks to investigate the efficacy of education + goal-based
      programmes for the promotion of healthy sleep habits and to evaluate its impact on daytime
      sleepiness and mental health.
    

Detailed description: 
      This study is a sub-study under the existing Health Insights Singapore study (hiSG). The hiSG
      study is a longitudinal cohort study among working adults (aged 21-42y), monitoring health
      parameters through a Fitbit tracker and mobile phone-based questionnaires.

      The hiSG Sleep Health Study (hiSG SHS) sub-study, will evaluate the efficacy of two
      goal-based interventions for improving sleep. Participants will be recruited from the
      existing hiSG subject pool (target N=300), and should have a habitual sleep duration below
      the recommended 7h (as determined from the currently available hiSG data). Following informed
      consent, participants will be randomized by the study team into two groups, a) Goal-Setting
      and b) Tracking, based on a 2:1 ratio, i.e. in the event 300 participants are enrolled, 200
      will be allocated to Goal-Setting and 100 to Tracking.

      The study is 22 weeks long and will proceed in 3 main phases, namely, 1) Baseline (Week 1-2)
      2) Intervention (Week 3-12), and 3) Follow-up (Week 13-22).

      Throughout the study, participants in both groups will be rewarded for logging their nightly
      sleep sessions regularly on their study wearable device, based on a weekly completion bonus
      for a minimum of 3 nights of sleep preceding weekdays (Sunday - Thursday nights) per week.

      Daily questionnaires probing daytime sleepiness, mood, and stress levels as well as
      once-per-study phase sleep health, sleep hygiene, work-related stress and mental wellbeing
      questionnaires will be pushed to participants during the baseline (Week 1-2), intervention
      (Week 11-12) and follow-up periods (Week 21-22) via the hiSG mobile application. Participants
      will also be reimbursed for completion of these questionnaires.

      Both groups will also receive sleep education tips before the intervention period. During the
      intervention phase, the Goal-Setting group will be additionally rewarded for achieving sleep
      goals, i.e. 30 mins longer than their habitual sleep duration and sleeping before midnight.

      In addition, given the pervasive telecommuting arrangements presently enforced in many
      workplaces to curb spread of the COVID-19 pandemic, a work-life balance, burnout and work
      engagement questionnaire will be administered to better understand reasons that could
      contribute to poor sleep health and mental wellbeing.
    

Intervention name(s): Fitbit; Sleep education tips; Goal-setting
Intervention type(s): Device; Behavioral; Behavioral
Intervention description(s): A consumer sleep tracker will be used to monitor sleep patterns throughout the study; Sleep tips will be provided before the intervention phase; During the intervention phase, the Goal-Setting group will be additionally rewarded for achieving sleep goals, i.e. 30 mins longer than their habitual sleep duration and sleeping before midnight.
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: None (Open Label)
Primary purpose: Health Services Research