Table 1.

Demographic data for prolonged mechanical ventilation (PMV) and control groups.

Variable	Control group (n = 90)	PMV group (n = 12)	p
Age (mo)	12 + 1.2	5.5 + 0.8	0.048
Weight (kg)	6.9 + 0.32	5.1 + 0.4	0.28
Bypass time (min)	95.4 + 5	99.2 + 12	0.76
Cross clamping time (min)	75 + 4	82.5 + 10.3	0.45