Association between sleep duration and differences between weekday and weekend sleep with body mass index & waist circumference among Black women in Sistertalk II

Objectives: Examine associations between sleep duration and differences between weekday and weekend sleep with body mass index and waist circumference in a sample of high-risk Black women from the SisterTalk II study. Design: Cross-sectional analysis of baseline data from an intervention study targeting dietary and physical activity behaviors. Setting: Women were recruited from the Providence, RI, USA, area. Participants: The sample includes 569 middle-aged Black women who were hypertensive or at risk for hypertension. Measurements: Participants self-reported their weekday and weekend sleep duration. Body mass index (BMI) and waist circumference (WC) were objectively measured. Associations between the sleep and anthropometric measures were examined using analysis of variance and multivariable regression models controlling for birthplace, educational attainment, employment status, and annual household income. Results: 25.5% of the sample were very short sleepers (<= 6 hrs), 28.8% short sleepers (>= 6 to <7 hrs), 40.4% recommended sleepers (>= 7 to <= 9 hrs), and 5.3% long sleepers (>9 hrs); 70.7% had a consistent sleep duration (<= 2-hour difference between weekday and weekend sleep duration), 21.6% were classified as "weekend snoozers" (>2-hours more sleep on weekends), and 7.7% were classified as "weekend warriors" (>2-hours less sleep on weekends). Compared to recommended sleepers, very short sleepers and long sleepers had significantly greater BMIs, while long sleepers had significantly larger WCs. Being a weekend snoozer was also associated with increased BMI and WC. Conclusions: In this sample of high-risk Black women, sleep duration and differences between weekday and weekend sleep were independently associated with excess weight and abdominal obesity. (C) 2020 National Sleep Foundation. Published by Elsevier Inc. All rights reserved.