Association of restless legs syndrome and mortality in end-stage renal disease: an analysis of the United States Renal Data System (USRDS)

Table 2 Survival analysis – propensity matched population (n = 1092)

Variable	β	SE	HR	P
Incidence age, years	0.03	0.005	1.03	<.0001
Female	−0.02	0.11	0.98	0.9
Race	0.22	0.09	1.25	0.01
White	−0.53	0.72	0.59	0.5
Black	−0.82	0.73	0.44	0.3
Asian	−1.15	0.79	0.32	0.1
Native American	−1.45	1.02	0.23	0.15
Ethnicity
Non-Hispanic/Latino	0.26	0.19	1.3	0.2
Vascular access type
AV Fistula	−0.39	0.42	0.68	0.4
Graft	−0.11	0.46	0.89	0.8
Catheter	−0.07	0.39	0.93	0.9
Body mass index (kg/m²)	−0.006	0.009	0.99	0.5
Serum albumin (g/dl)	−0.27	0.08	0.77	0.0005
Cardiovascular
Coronary artery disease	0.14	0.13	1.15	0.3
Congestive heart failure	0.34	0.12	1.41	0.004
Cerebrovascular disease	0.17	0.17	1.19	0.3
Peripheral vascular disease	0.24	0.15	1.27	0.1
Hypertension	−0.43	0.15	0.65	0.003
Other
Diabetes	0.1	0.12	1.1	0.4
Cancer	0.39	0.18	1.48	0.03
Psychological disorders
Major depressive disorder	0.32	0.72	1.37	0.7
Dysthymic disorder	0.63	0.59	1.88	0.4
Anxiety	0.46	0.46	1.57	0.3
Tobacco dependence	0.14	0.22	1.16	0.5
Case type
No sleep disorders (NSD)	0.15	0.14	1.16	0.3

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