Table 1 Demographic and operative information

Age(yrs)

53.93 ± 7.40

71.80 ± 5.85

Z = −6.658

Gender(M/F)

11/19

13/17

χ² = 2.411

Height(cm)

167.77 ± 11.63

163.30 ± 9.10

t = 1.657

Weight(kg)

66.33 ± 11.88

65.67 ± 11.70

t = 0.219

BMI

23.44 ± 2.46

24.44 ± 2.62

t = −1.525

Operative time(min)

64.87 ± 10.10

63.77 ± 11.33

t = 0.397