Associations of Sleep Duration and Regularity with Level of Obesity Among Youth in a Weight Loss Program
Chuang, Janet, Fehr, Karla K., Ievers-Landis, Carolyn E., Narasimhan, Sumana, Uli, Naveen and O'Riordan, Mary Ann. "Associations of Sleep Duration and Regularity with Level of Obesity Among Youth in a Weight Loss Program." Translational Issues in Psychological Science 1, No. 1 (Mar 2015): 45-56. doi:10.1037/tps0000012.
This study evaluated the association of sleep duration and irregularity (shifts in sleep duration and wake/bedtimes from weekday to weekend) with baseline level of obesity in youth enrolled in a weight management program. The 288 youth ranged in age from 6 to 18 years old; 61.1% were female, and 52.5% were Caucasian. In adjusted models, shorter sleep duration was significantly related to higher BMI z scores. Two measures of sleep irregularity, bedtime and wake-time shift, were also each related to baseline BMI z scores, but these relationships did not remain significant in adjusted models. In gender-stratified adjusted regression models, shorter sleep duration and greater wake-time shift for females were significantly associated with higher BMI z scores. None of the sleep variables were significantly related to BMI z scores for males in adjusted models. Taken together, the results of this study support the relationship between sleep duration and regularity with level of obesity in a racially diverse sample of predominantly obese, treatment-seeking youth.