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Table 3 Multivariate analysis of risk factors associated with reoperation after internal fixation of nondisplaced FNFs in elderly patients

From: Nomogram for predicting reoperation following internal fixation of nondisplaced femoral neck fractures in elderly patients

Characteristics

OR

95% CI (lower limit)

95% CI (upper limit)

P value

 Age

0.910

0.837

0.989

0.026*

 Posterior tilt angle

2.986

1.143

7.797

0.026*

 AST (> 40 U/L)

3.026

0.676

13.532

0.147

 ALP (> 125 U/L)

4.033

1.275

12.756

0.018*

 Na+ (< 135 mmol/L)

2.875

0.902

9.163

0.074

 ALB (< 35 U/L)

5.345

1.577

18.116

0.007*

 Interval to weight-bearing

0.739

0.618

0.885

0.001*

 Pauwel’s classification

    

  I

Ref.

   

  II

1.915

0.508

7.217

0.337

  III

5.056

1.498

17.062

0.009*

  1. Abbreviations: OR odds ratio, CI confidence interval, AST aspartate transaminase, ALP alkaline phosphatase, Na+ serum sodium concentration, ALB albumin
  2. *: Statistically significant difference