Table 2.

Risk factors for extubation failure, controlled for gestational age and birth weight

Independent variable	Categories	OR	95%CI OR	p value
Constant	-	-	-	0.015
MV length (days)	-	0.843	0.728-0.975	0.021
pH	-	0.001	0.001-0.220	0.016
PO2	-	1.012	1.002-1.023	0.024

OR - odds ratio; 95%CI - 95% confidence interval; MV - mechanical ventilation; pH - potential of hydrogen; PO₂ - partial pressure of oxygen.