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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