Table 3.

Test of proportional hazard assumption

Covariates	Chi-square	p-value
Residence	0.129	0.720
Corrective surgery	2.364	0.271
Anemia	1.762	0.543
Types of Cardiac Disease	0.086	0.770
Economic status	1.342	0.452
Pulmonary hypertension	0.193	0.660
Nutritional status	0.044	0.830
Ejection fraction	1.415	0.230
Hemoglobin	2.041	0.461
Global	2.136	0.910