Table 1 The demographic and clinical characteristics and perioperative data of the patients of P-TLIF and wiltse approach TLIF

No. of patients

26

30

Sex (M/F)

16/10

18/12

P = 0.906

Age, yr

53.2 ± 11.3

54.0 ± 12.1

P = 0.808

Operation segment

L4-L5

11

19

-

L5-S1

7

3

-

L3-L5

4

3

-

L4-S1

4

5

-

Operation time, min/segment

171.73 ± 34.25

179.60 ± 21.77

P = 0.289

Estimate blood loss, mL/segment

192.31 ± 59.48

79.67 ± 28.59

P = 0.000*

postoperative ambulation time,d

4.1 ± 1.2

3.0 ± 0.9

P = 0.000*

Discharge time, d

7.7 ± 1.9

6.1 ± 1.2

P = 0.002*

Postopreative drainage, ml

285.57 ± 123.05

43.33 ± 27.89

P = 0.000*

Serum creatine kinase, IU/L

Preoperatively

84.53 ± 37.52

74.75 ± 24.73

P = 0.349

1 day postoperatively

532.76 ± 225.76

384.10 ± 141.99

P = 0.018*

C relative protein(mg/L)

Preoperatively

1.72 ± 0.33

1.71 ± 1.14

P = 0.980

1 day postoperatively

28.95 ± 24.32

29.50 ± 13.27

P = 0.754