Nearly one in five pre-dialysis patients with chronic kidney disease (CKD) did not get the optimal amount of sleep, and this was associated with poorer quality-of-life outcomes, according to an observational study, reportsĀ Medpage Today.

Of the 1,910 participants, 11% reported not getting enough sleep (defined as 5 hours or less per night) and 7% said they slept too much (defined as 9 hours or more), said Kyu-Beck Lee, MD, of the Sungkyunkwan University School of Medicine in Seoul, Korea, and colleagues.

Patients who got the optimal 7 hours of sleep each night scored higher on the physical component of the Short-Form-36 Health Survey (an average 76 out of 100), compared with “under sleepers” (67/100) and “over sleepers” (62/100)(P <0.01 for trend), Lee’s team reported online in the Clinical Journal of the American Society of Nephrology.