Cognitive Behavioral Sleep Intervention for Prevention of Type 2 Diabetes
Cognitive Behavioral Sleep Intervention for Prevention of Type 2 Diabetes
The proposed study aims to evaluate if improving sleep could enhance the intensive lifestyle
 intervention for improving weight loss and glycemic control in prediabetic individuals who
 have insomnia with short sleep duration. A cognitive behavioral intervention for insomnia
 with adjustments aimed at increasing sleep duration (CBT-Sleep) will be used for this study.
Inclusion Criteria:

 -  (a) Hong Kong residents,

 -  (b) BMI > 23kg/m2,

 -  (c) aged 18 to 65 year-old,

 -  (d) have prediabetes, defined by a plasma fasting glucose concentration of 5.6 to 6.9
 mmol/L, impaired glucose tolerance (2hglucose 7.8-11.0 on OGTT), or HbA1c 5.7-6.4%,

 -  (e) have average habitual sleep duration < 6.5 hours, confirmed by actigraphy measure
 of sleep for 2 weeks or have insomnia, confirmed in a clinical sleep interview and
 actigraph-measure of greater than 30 minutes of sleep onset latency or nighttime
 awakening for 3 nights or more per week

 Exclusion Criteria:

 -  (a) have unmanaged sleep apnea or other sleep disorders,

 -  (b) have any current severe mental illnesses,

 -  (c) have any medical conditions or medication use that could undermine the efficacy of
 the sleep intervention,

 -  (d) have shift work schedules,

 -  (e) have any environmental constraints on the feasibility of implementing a sleep
 schedule of at least 7.5 hours