The relationship between sleep quality and daytime sleepiness and various anthropometric parameters in stable patients undergoing hemodialysis.
OBJECTIVE
This study evaluates the relationship between sleep quality and daytime sleepiness and body mass index (BMI), waist circumference (WC), waist to hip ratio (WHR), and conicity index in stable patients undergoing hemodialysis (HD).


DESIGN AND METHODS
This was a cross-sectional study. Patients regularly received dialysis treatment in a state hospital. Study participants had a medical history taken and underwent physical examination, measurement of anthropometric factors, and calculations (including BMI, WC, WHR, and confidence interval [CI]) and biochemical analysis. We evaluated quality of life with the 36-item short form survey (SF-36) and depressive symptoms with the Beck Depression Inventory (BDI). Self-reported sleep quality (using the Pittsburgh Sleep Quality Index [PSQI]) and daytime sleepiness (using the Epworth Sleepiness Scale (ESS) was recorded for all patients.


RESULTS
In total, 101 patients undergoing HD were enrolled. Stepwise linear regression analysis of factors revealed that BMI (b [partial regression coefficient], 0.405; CI, 0.177-0.632; P, .001), WC (b, 0.082; CI, 0.008-0.157; P, .031), BDI score (b, 0.091; CI, 0.032-0.149; P, .003), presence of diabetes (b, 1.621; CI, 0.175-3.068; P, .028), and presence of cerebrovascular disease (b, 1.944; CI, 0.103-3.785; P,.039) were related to PSQI score (as a dependent variable). Using the same independent parameters, only the physical component summary score of the SF-36 was independently related to the ESS score (b, -0.120; CI, -0.190 to -0.049; P, .001). None of the anthropometric parameters was related to ESS.


CONCLUSIONS
BMI and WC were the only parameters found to be related to sleep disturbance. None of the anthropometric parameters was related to daytime sleepiness.