Table 1.

Characteristics of patients who initiated dialysis between January 1, 2005 and December 31, 2006 in CORR and the study population

	Patients Registered to CORR		Patients Selected in This Study
	Male	Female	Male	Female
n (%)	6068 (59)	4129 (41)	775 (57)	576 (43)
Hemodialysis, n (%)	4977 (82)	3327 (81)	651 (84)	471 (82)
Peritoneal dialysis, n (%)	1091 (18)	802 (19)	124 (16)	105 (18)
Age in years, mean ± SD	64 ± 16	64 ± 16	63 ± 15	64 ± 15
Number of comorbid conditions, mean ± SD	3 ± 2	2 ± 2	3 ± 2	3 ± 2