Table 4.

Analysis of possible risk factors associated with mortality

Risk factors	Univariate analysis			Multivariate analysis
	RR	95% CI	P value	HR	95% CI	P value
Age (for each year)	1.15	1.01−1.30	0.001a	1.01	1.00−1.02	0.001a
Male (yes)	1.01	0.76−1.35	0.477	0.98	0.85−1.12	0.798
Education (>6 yr of schooling)	0.82	0.72−0.95	0.005a	0.87	0.60−1.14	0.106
Income (>$300 per month)	0.79	0.65−0.98	0.030a	0.70	0.48−1.02	0.708
Residence in rural area (yes)	1.06	0.79−1.52	0.400	1.14	0.87−1.49	0.332
Diabetes (yes)	1.40	1.12−1.76	0.003a	1.29	1.09−1.50	0.012a
Heart disease (yes)	1.28	0.80−2.06	0.168	1.15	0.42−1.88	0.709
Liver disease (yes)	0.70	0.24−2.00	0.347	0.73	0.19−1.28	0.186
Cancer (yes)	1.76	1.03−2.99	0.001a	1.36	1.16−1.57	0.011a
Hemoglobin (<6 g/dl)	0.93	0.81−1.07	0.181	1.08	0.87−1.33	0.459
Serum potassium (>7 mEq/dl)	0.96	0.72−1.28	0.425	0.85	0.56−1.22	0.148
Urea (>300 mg/dl)	1.08	0.81−1.44	0.324	0.91	0.73−1.12	0.363
Serum bicarbonate (<7 mEq/dl)	1.33	1.00−1.77	0.029a	1.26	0.84−1.87	0.252
Renal transplant (yes)	0.39	0.30−0.51	0.001a	0.50	0.29−0.88	0.016a
Chronic hemodialysis programme (yes)	0.57	0.46−0.71	0.001a	1.02	0.62−1.68	0.926
Continuous ambulatory peritoneal dialysis (yes)	0.35	0.24−0.51	0.001a	0.91	0.53−1.55	0.735
Intermittent hemodialysis (yes)	6.29	4.41−8.98	0.001a	4.30	2.65−6.96	0.001a
Intermittent peritoneal dialysis (yes)	3.18	1.91−5.27	0.001a	1.97	1.13−3.44	0.001a
Health insurance (No)	7.51	5.12−11.0	0.001a	2.64	1.84−3.79	0.001a

CI, confidence interval; HR, hazard ratio; RR, risk ratio.

^aP < 0.05 indicates statistical significance.