Poster Topical Area: Obesity
Location: Hall D
Poster Board Number: 700
Objective: As sleep duration (SD) and dietary quality (DQ) have been associated with each other, and with weight in previous research, this study explored SD and DQ and their relationship as outcomes of a novel randomized controlled trial weight loss intervention for overweight/obese adults.
Methods: This study is a secondary data analysis of an 8-week intervention with and without the Bite Counter device for tracking steps, bites, and eating rate on weight loss. Experimental (Ex, n=37) and control (Cx, n=35) groups were mostly female (62.2%, 68.6%) and white (70.3%, 65.7%), and similar in age (37±16; 39±14yrs) and BMI (31.2±3.5, 31.5±3.0). Both groups received a workbook at week 0 that introduced nutrition-related topics during the 8 weeks. Outcomes included weight, kcal intake, SD, and DQ. These data were captured week 0 and 8 during in-lab visits and phone interviews. SD was collected through the 7-Day Physical Activity Recall. Dietary data were collected through three 24-hour dietary recalls at week 0 and 8 (6 recalls total). DQ was calculated using the 2015 HEI scoring algorithm through SAS. Outcomes were examined via paired t-tests and 2-way repeated measures ANOVA; all ran as completer’s analyses and repeated as intent to treat.
Results: Significant within-group changes were found for total kcals consumed and weight loss from week 0 to 8 for Ex (-300.1kcal/day, p=0.013; -1.0g, p=0.03), but not for Cx (-19.5kcal/day, P>0.05; -0.6kg, P>0.05). A significant time by group interaction was observed for mean kcal consumed (F=4.03, p=0.049, Eta Sq=0.061). However, no significant time by group interactions were found for weight loss, SD (Ex: 7.5±1.0, 7.7±0.9; Cx: 7.6±0.9, 7.7±0.9 hours), or DQ. Mean DQ increased non-significantly in both groups, Ex (54.6±12.4; 56.5±14.8) and Cx (54.4±7.9; 56.1±10.5), from pre- to post-intervention.
Conclusion: The potential health benefits posed from self-monitoring, such as significantly lower kcal consumption and weight loss, were further indicated. Over 8 weeks, SD and DQ changed in favorable directions, but slightly and not significantly. Tracking steps, bites, and eating rate did not differentially influence SD and DQ, but their relationship in subjects encourages future research during weight loss.
University of Rhode Island
Providence, Rhode Island