This is a randomized pilot study to better understand the relationships among insomnia, weight loss, and breast cancer. This study will assess the effectiveness of a sleep intervention prior to a web- and phone-based weight loss program.
Participants are women with a diagnosis of early stage breast cancer (ESBC), a BMI ≥25, and insomnia. A total of 30 participants will be randomized to either cognitive behavioral therapy for insomnia and behavioral weight loss (CBT-I+BWL) or a sleep education program and behavioral weight loss (EDU+BWL). Measures will be collected at baseline, 8 weeks (after the CBT-I or EDU program) and at 3 and 6 months after starting BWL. The primary outcome will be % total weight loss. Additionally, eating behaviors, physical activity, and sleep parameters will be carefully assessed. The sleep intervention phase of the study includes 6 sessions over 8 weeks (2 in-person, followed by 4 phone or videoconferencing sessions), and the BWL intervention includes 15 sessions over 6 months (1 in-person, 14 by phone or videoconference). Participants will be given physical activity trackers and will use a dietary app to record their food intake. There are 4 in-person assessment visits (baseline/randomization, 8-week follow up, 3-month follow up, 6-month follow up). These assessment visits are coordinated with in-person sleep and weight loss intervention visits. Some of the measures that will be recorded throughout the study include: height, weight, anthropometric measures (waist/hip measurements), sleep diaries, and self-report measures.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
DOUBLE
Enrollment
30
CBT-I involves identifying and replacing thoughts and behaviors that cause or worsen sleep problems with habits that promote sound sleep. There will be 6 intervention sessions over an 8-week period. The first two sessions are consecutive weekly in-person sessions followed by a rest week. The third session is conducted remotely by phone, followed by another rest week. The three remaining sessions are weekly and conducted remotely.
EDU involves learning behavioral treatment information about sleep that is widely available to patients and practitioners. The program will parallel the CBT-I intervention in schedule, number, and length of sessions.
Johns Hopkins University, Bayview Medical Campus
Baltimore, Maryland, United States
Percent Weight loss
The primary outcome will be percent (%) weight loss. All subjects who are randomized will be included in the analysis of the primary outcome. Weight will be measured according to standardized BMI and anthropometric procedures (hip/waist ratio). For the primary aim, comparing the effects of CBT-I+BWL and EDU+BWL on % weight loss at 3 and 6 months, we will model outcomes (at 3 months \& 6 mos.) as a function of baseline level, treatment assignment, time, and their interaction. The interaction term represents the between-group difference in change over time on the outcome.
Time frame: Change from Baseline, 8 weeks, 3 months and 6 months
Sleep continuity as measured by wake after sleep onset (WASO)
WASO will be measured in minutes. Sleep continuity will be measured using actigraphs and sleep diaries at baseline, 8 weeks, 3 months, and 6 months. For this aim, evaluating the extent to which short-term sleep continuity improvements (8 wk and 3 mo) are associated with improvements in daily physical activity and dietary quality/quantity and determining their association with 3- and 6-month weight changes, we will model between-group differences in the short-term trajectory of change for the primary sleep continuity measures, actigraphy TST and WASO.
Time frame: Change from Baseline, 8 weeks, 3 months and 6 months
Sleep continuity as measured by total sleep time (TST)
TST will be measured in minutes. Sleep continuity will be measured using actigraphs and sleep diaries at baseline, 8 weeks, 3 months, and 6 months. For this aim, evaluating the extent to which short-term sleep continuity improvements (8 wk and 3 mo) are associated with improvements in daily physical activity and dietary quality/quantity and determining their association with 3- and 6-month weight changes, we will model between-group differences in the short-term trajectory of change for the primary sleep continuity measures, actigraphy TST and WASO.
Time frame: Change from Baseline, 8 weeks, 3 months and 6 months
Sleep continuity as measured by sleep efficiency (SE)
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Sleep efficiency is measured as the ratio of total sleep time (TST) compared to the total time spent in bed (TST / time in bed). This is measured in percent of total time spent in bed, asleep. Sleep continuity will be measured using actigraphs and sleep diaries at baseline, 8 weeks, 3 months, and 6 months.
Time frame: Change from Baseline, 8 weeks, 3 months and 6 months
Sleep continuity as measured by sleep latency (SL)
Sleep latency is the time it takes to transition from full wakefulness to sleep. This is measured in minutes. Sleep continuity will be measured using actigraphs and sleep diaries at baseline, 8 weeks, 3 months, and 6 months.
Time frame: Change from Baseline, 8 weeks, 3 months and 6 months