4. Multivariate logistic regression analysis for factors associated with in-hospital mortality.

Effect	Point estimate	95% Confidence limits	P-value
Elixhauser comorbidity index	1.147	1.095−1.201	< 0.0001
CHA2DS2VASc score	1.26	1.163−1.365	< 0.0001
Weekend admission	1.161	1.025−1.316	0.0191
Length of stay	1.011	1.004−1.018	0.003
Hypertension	0.453	0.394−0.521	< 0.0001
Congestive heart failure	1.195	0.658−2.17	0.5574
Valvular heart disease	0.292	0.095−0.894	0.031
Renal failure	1.124	0.969−1.303	0.1234
Female gender	0.716	0.616−0.832	< 0.0001
Acute respiratory failure	10.243	8.872−11.825	< 0.0001