Table 4.

Adjusted HR for mortality by dialysis modality at 90 and 366 d^a

Parameter	HD at Day 90		PD at Day 90		Totals
	HR (95% CI)	P	HR (95% CI)	P
HD at 1 yr	HR = 1.0 (reference)		HR = 1.24 (1.13–1.37)		n = 11,424
	n = 10,466		n = 958	<0.001
PD at 1 yr	HR = 1.56 (1.41–1.87)		HR = 1.38 (1.31–1.44)		n = 8375
	n = 856	<0.001	n = 7519	<0.001
Total	n = 11,322		n = 8477		n = 19,799

^aTotal n = 19,799, because only 1-yr survivors are included. HR are relative to people who were receiving HD at day 90 and 1 yr. All of theses risks significantly differed from each other in addition to the HD₉₀/HD₃₆₅ group. These risks did not significantly interact with BMI categories (P = 0.2 for interaction) or with comorbidity and age (P = 0.14 for interaction).