Table 3.

Multivariate model of factors associated with mortality, with groups based on ESA use during the baseline period^a

Variable	No ESA Use (n = 3143)			On ESA Throughout (n = 1823)
	HR	95% CI	P	HR	95% CI	P
Age (per 10 yr)	1.57	1.46 to 1.70	<0.001	1.53	1.41 to 1.65	<0.001
Male	1.25	1.06 to 1.48	0.01	1.14	0.96 to 1.35	0.13
Diabetes	1.31	1.12 to 1.54	0.001	0.94	0.79 to 1.12	0.49
GFR (per 5 ml/min)	0.84	0.80 to 0.88	<0.001	0.93	0.88 to 0.97	0.001
Dialysis initiation	1.94	1.58 to 2.38	<0.001	1.70	1.37 to 2.11	<0.001
Absolute Hb (intercept; g/L)	0.99	0.980 to 0.993	<0.001	0.99	0.980 to 0.993	<0.001
Hb trend (slope; g/L per mo)	0.96	0.93 to 0.99	0.013	0.94	0.92 to 0.97	<0.001
Residual SD (g/L)	1.03	1.02 to 1.05	<0.001	1.02	1.01 to 1.04	0.008

^aCI, confidence interval; HR, hazard ratio.