Table 1 General information and perioperative indicator

Number of patients

139

85

54

Age(year)

62.99 ± 8.27

63.61 ± 8.20

62.00 ± 8.36

Sex, n (%)

Men

47

32(37.6%)

15(27.8%)

Women

92

53(62.4%)

39(72.2%)

BMI

26.02 ± 2.92

26.49 ± 4.27

Fusion segment, n (%)

L2/3

2(1.45%)

2(3.7%)

L3/4

31(22.30%)

23(27.1%)

8(14.8%)

L4/5

106(76.25%)

62(72.9%)

44(81.5%)

Operation time (min)

99.06 ± 38.74

250.09 ± 74.93

Hospital stays (day)

7.98 ± 1.54

7.87 ± 2.71

Intraoperative blood loss (ml)

26.76 ± 9.90

60.37 ± 21.63