Table-I.

Demographic data and surgical characteristics (n=60).

	n	Age (yr)	Weight (kg)	Duration of surgery (min)	Duration of anesthesia (min)
Group O	30	29.2±10.6	54.4±5.2	63.9±15.2	94.7±24.1
Group N	30	30.7±11.4	53.3±4.4	61.1±17.4	97.9±22.2
P		0.59	0.38	0.51	0.59