PURPOSE: To investigate the cross-sectional association between sleep duration and two biomarkers of metabolic function, adiponectin and leptin. METHODS: Participants were 113 randomly selected offi- cers (26-61 years) from the Buffalo, New York Police Department. Metabolic markers were measured in 2008 from frozen fasting specimens stored at -80 degrees C since 1999-2000. Mean levels of the metabolic markers were assessed across categories of sleep duration (0-5.9, 6.0-6.9, > 7.0 hours), using ANOVA and ANCOVA. RESULTS: Longer sleep duration was associated with higher mean levels of adiponectin (ageadjusted p Z 0.049) and slightly lower mean levels of leptin (age-adjusted p Z 0.176) among men only. Among officers with BMI > 25.0 Kg/m2, longer sleep duration was significantly associated with higher mean levels of adiponectin (age- and genderadjusted p Z 0.030); levels of leptin tended to decrease as duration of sleep increased (age- and gender-adjusted p Z 0.213). Similarly, longer sleep duration was directly associated with adiponectin (age- and genderadjusted p Z 0.016) and inversely associated with leptin (age- and gender-adjusted pZ0.201) only among officers with larger abdominal height. BMI appreciably modified the association between sleep duration and leptin (interaction pZ0.061). CONCLUSION: Based on previous research, adiponectin is cardio-protective while leptin is not; our results therefore appear to underscore the potential benefits of adequate sleep especially among persons with increased body weight and abdominal height.
Biological-effects; Biological-factors; Biological-function; Biological-monitoring; Biological-rhythms; Biological-systems; Exposure-assessment; Exposure-levels; Exposure-methods; Metabolic-rate; Metabolism; Neurophysiological-effects; Neurophysiology; Police-officers; Quantitative-analysis; Shift-work; Sleep-deprivation; Sleep-disorders; Statistical-analysis; Weight-factors; Weight-measurement; Workplace-studies; Work-practices