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Self‐perceived quality of sleep and mortality in N orwegian dialysis patients
Author(s) -
Brekke Fredrik B.,
Waldum Bård,
Amro Amin,
Østhus Tone B. H.,
Dammen Toril,
Gudmundsdottir Helga,
Os Ingrid
Publication year - 2014
Publication title -
hemodialysis international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.658
H-Index - 47
eISSN - 1542-4758
pISSN - 1492-7535
DOI - 10.1111/hdi.12066
Subject(s) - medicine , hazard ratio , dialysis , depression (economics) , hemodialysis , confidence interval , epworth sleepiness scale , quality of life (healthcare) , excessive daytime sleepiness , sleep disorder , physical therapy , insomnia , psychiatry , polysomnography , apnea , nursing , economics , macroeconomics
Sleep complaints are prevalent and associated with poor health‐related quality of life ( HRQoL ), depression and possibly mortality in dialysis patients. This study aimed to explore possible associations between sleep quality, daytime sleepiness and mortality in dialysis patients. In this study, 301 dialysis patients were followed up to 4.3 years. HRQoL was evaluated at baseline with the K idney D isease and Q uality of L ife— S hort F orm ( KDQoL ‐ SF ), depression with B eck D epression I nventory ( BDI ), sleep quality with Pittsburgh Sleep Q uality I ndex and daytime sleepiness with E pworth S leepiness S cale. The single item “on a scale from 0–10, how would you evaluate your sleep?” in the sleep subscale in KDQoL ‐ SF was used to identify poor (0–5) and good sleepers (6–10). A total of 160 patients (53.3%) were characterized as poor sleepers. They were younger (r = 0.241, P < 0.001), had more depression ( BDI : 8.72 ± 6.79 vs. 13.60 ± 8.04, P < 0.001), a higher consumption of hypnotics and antidepressants and reduced HRQoL (Mental Component Summary score: 45.4 ± 11.0 vs. 50.0 ± 10.4, P < 0.001. Physical Component Summary score: 35.0 ± 9.9 vs. 38.5 ± 10.5, P = 0.004). In multivariate analyses, poor sleepers had nearly a twofold increase in mortality risk (hazard ratio [ HR ] 1.92, confidence interval [CI] 1.10‐3.35, P = 0.022). Daytime sleepiness was not related to mortality ( HR 1.01, CI 0.95‐1.08, P = 0.751). Sleep complaints predicted increased mortality risk in dialysis patients and should therefore be routinely assessed. Further studies are needed to find suitable treatment options for poor sleep in dialysis patients as it may affect both HRQoL and survival.