Table 4.

Effects of body mass index on survival

	Model 1		Model 2		Model 3		Model 4
Independent variable	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P	HR (95% CI)	P
Body mass index (kg/m2)	0.98 (0.95, 1.01)	0.1	0.92 (0.87, 0.97)	<0.01	0.91 (0.85, 0.97)	<0.01	0.90 (0.85, 0.96)	<0.01
Age (y)					1.03 (1.02, 1.05)	<0.001	1.03 (1.01, 1.05)	<0.01
Black					0.57 (0.31, 1.05)	0.07	0.69 (0.36, 1.34)	0.3
Male gender					1.27 (0.82, 1.96)	0.3	1.39 (0.88, 2.20)	0.2
Diabetes mellitus					1.57 (0.99, 2.47)	0.05	1.38 (0.86, 2.23)	0.2
Cardiovascular disease					1.55 (1.03, 2.32)	0.03	1.67 (1.11, 2.52)	0.01
Serum albumin (g/dL)					0.78 (0.49, 1.26)	0.3	0.83 (0.52, 1.33)	0.4
Ambulatory systolic BP (mmHg)					1.01 (1.00, 1.02)	0.2	1.01 (1.00, 1.02)	0.2
Left ventricular mass index (g/m2)					1.00 (0.99, 1.00)	0.4	1.00 (0.99, 1.00)	0.4
Dialysis vintage (y)					1.09 (1.03, 1.16)	<0.01	1.10(1.04, 1.16)	<0.001
Serum creatinine (mg/dL)							0.93 (0.85, 1.02)	0.1
Body mass index * time			1.002 (1.000, 1.003)	<0.01	1.002 (1.000, 1.004)	0.02	1.002 (1.001, 1.004)	<0.01