Table 2 Single factor analysis of risk factors for postoperative failure

Gender

 Male

25

14

χ² = 0.011

 Female

5

3

P = 0.915

Age(y)

  < 40

19

7

χ² = 1.748

  ≥ 40

11

10

P = 0.186

BMI (kg/m²)

  < 24

5

6

χ² = 1.964

  ≥ 24

25

11

P = 0.161

25(OH)D (nmol/L)

  < 50

17

15

χ² = 3.934

  ≥ 50

13

2

P = 0.047

CTX (ng/mL)

  < 0.714

12

4

χ² = 0.900

  ≥ 0.714

18

13

P = 0.343

Etiology

 Alcoholic

16

5

χ² = 2.049

P = 0.359

 Hormonal

7

6

 Idiopathic

7

6

ARCO stage

 ARCO IIB

9

1

χ² = 11.293

P = 0.004

 ARCO IIC

12

2

 ARCO IIIA

9

14