Skip to main content

Table 2 Univariate analysis of factors associated with implant failure (n = 45)

From: Risk factors for implant failure in reverse oblique and transverse intertrochanteric fractures treated with proximal femoral nail antirotation (PFNA)

Parameter

Implant failure

OR (CI)

p value

No, number (%)

Yes, number (%)

Sex

  

0.63 (0.11–3.51)

0.593

 Male

15 (38)

3 (50)

  

 Female

24 (62)

3 (50)

  

Age

  

1.50 (0.16–14.56)

0.727

 < 65 years

9 (23)

1 (17)

  

 ≥ 65 years

30 (77)

5 (83)

  

BMI

 < 18.5*

3 (8)

0 (0)

Undefined

 

 18.5–23.9

20 (51)

2 (33)

  

 ≥ 24.0*

16 (41)

4 (67)

2.50 (0.41–15.43)

0.324

Mechanism of injury

  

0.58 (0.06–5.58)

0.637

 Low energy

29 (74)

5 (83)

  

 High energy

10 (26)

1 (17)

  

ASA score

 1

3 (8)

0 (0)

Undefined

 

 2

22 (56)

5 (83)

3.18 (0.34–30.16)

0.313

 3

14 (36)

1 (17)

  

AO/OTA classification

 31A-3.1

7 (18)

1 (17)

  

 31A-3.2

7 (18)

0 (0)

Undefined

 

 31A-3.3

25 (64)

5 (83)

1.40 (0.14–14.03)

0.775

Reduction method

  

2.11 (0.35–12.86)

0.420

 Closed

20 (51)

2 (33)

  

 Open

19 (49)

4 (67)

  

Lateral femoral wall

  

2.90 (0.50–16.76)

0.234

 Reduced

29 (74)

3 (50)

  

 Displaced

10 (26)

3 (50)

  

Reduction quality

 Poor

2 (5)

3 (50)

14.50 (1.69–124.24)

0.015

 Acceptable

8 (21)

0 (0)

Undefined

 

 Good

29 (74)

3 (50)

  

Posteromedial support

  

12.00 (1.65–87.52)

0.014

 Existence

36 (92)

3 (50)

  

 Loss

3 (8)

3 (50)

  
  1. *BMI (body mass index); 18.5–23.9 as the reference value