Abstract
Abstract
Introduction
This study examined the relationships between sleep quality and depressive symptoms, and whether this relationship is moderated by frequency of water intake in a sample of Latino adults.
Methods
Participants in this community-based study were 574 Latino adults from Lawrence, Massachusetts. Assessments included surveys and anthropological measures. Variables in this study included sleep quality (Pittsburgh Sleep Quality Index- PSQI), depressive symptoms (Center for Epidemiologic Studies Depression Scale -CES-D) and frequency of water intake in the previous three months (investigator-developed question). Covariates included demographics, stress (Perceived Stress Scale-PSS), and body mass index (BMI). Multiple linear regression analyses were conducted to explore associations between sleep and depressive symptoms. Potential moderating effect of frequency of water intake was assessed using hierarchical, moderated, multiple regression analysis.
Results
The sample was 51.2% female, with a mean age of 46.6 years (SD=15.4) and mean BMI of 29.6 (SD=5.9); 31% of the sample had CES-D scores > 22 (cut off for elevated depressive symptoms), the mean PSQI score was 13.11(SD=3.4) and 92% reported water intake two or more times daily. Sleep quality correlated positively with depression (r=.558; p=.000). After adjusting for covariates, sleep quality was strongly associated with depression (B = .417; SE=13; p =.000). The relationship between sleep quality and depressive symptoms was moderated by frequency of water intake (B= -.186, SE =1.107; p= 0.11).
Conclusion
This study is among the first to examine the association between sleep quality and depressive symptoms among Latino adults, and to show that frequency of water intake may moderate this association in this population.
Support
This study was supported by funding from the NIH: R01 MH085653; 1U48DP006381; and T32HL129953.