Table 4. Independent predictive factors of length of ICU stay by multivariete regression analysis in female patients .

Variable	Beta	Std. Error	P value
COPD	1.33	0.44	0.003
Cross-clamping time	0.88	0.36	0.016
Prolonged inotropic support	1.42	0.39	<0.0001
Prolonged ventilatory support	3.00	0.48	<0.0001
Hemodialysis	2.07	0.72	0.004
Postoperative blood transfusion (≥3 unite)	1.39	0.41	0.001
Postoperative stroke	2.59	1.18	0.029

COPD: Chronic obstructive pulmonary disease