3. Univariate-unadjusted odds ratio for factors associated with in-hospital mortality.

	Odds ratio	95% Confidence interval	P-value
Weekend admission	1.19	1.05−1.34	0.0043
Hypertension	0.67	0.59−0.75	< 0.0001
Congestive heart failure	2.92	1.77−4.81	< 0.0001
Valvular heart disease	0.92	0.29−2.88	0.8865
Renal failure	1.47	1.29−1.66	< 0.0001
Female gender	0.85	0.74−0.96	0.0138
Acute respiratory failure	11.7	10.18−13.44	< 0.0001
> or = 7 Chronic conditions	1.24	1.11−1.39	0.0001