Table 1. Demographic and surgical variables of patients in both groups and comparison by Mann-Whitney U test.

Group I (n = 100)
	Age (years)	BMIa (Kg/m2)	Duration of operation (minutes)
Range	23–70	19.1–30.8	50–300
Median ± IQRb	48 ± 12	25.8 ± 4.7	100 ± 40
Mean ± SDc	47.8 ± 9.5	25.8 ± 2.9	122.1 ± 62.8
Group II (n = 100)
Range	29–70	20.3–30.0	50–300
Median ± IQRb	50 ± 13	24.9 ± 4.6	90 ± 50
Mean ± SDc	49.3 ± 9.3	25.2 ± 2.9	110.2 ± 57.3
Group I vs. Group II (Mann-Whitney U test)
	p = 0.200	p = 0.075	p = 0.094

^aBMI: body mass index

^bIQR: interquartile range

^cSD: standard deviation