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Table 2 Univariate analysis of risk factors for CSFL

From: Risk factors and management strategies for cerebrospinal fluid leakage following lumbar posterior surgery

Risk factors

 

CSFL

Not CSFL

Correlation coefficient

P

Gender

Male

64

1547

0.0193

0.277

Female

51

1517

Age(years)

 ≤ 40

11

584

0.0666

0.0009

40–64

35

1157

 ≥ 65

69

1323

BMI (kg/m2)

 < 18.5

33

1103

0.0303

0.2316

18.5–22.9

39

995

 ≥ 23

43

966

Smoking history

Yes

71

1987

0.0122

0.4931

No

44

1077

Type of disease

LDH

6

801

0.4081

0

LSS

29

1114

LS

37

1085

LDS

31

62

LST

12

2

Type 2 diabetes

Yes

58

1385

0.0196

0.2685

No

57

1679

Duration of disease (years)

 < 3

29

1115

0.0788

0.0001

3–10

27

981

 > 10

59

968

Preoperative epidural hormone injection

Yes

68

1256

0.0687

0.0001

No

47

1808

Surgical method

Total laminar decompression

67

1593

0.0234

0.1863

Fenestration decompression

48

1471

Number of surgical levels

1

18

1028

0.0785

0.0001

2–3

42

1059

 > 4

55

977

Revision surgery

No

42

2473

0.203

0

Yes

73

591