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Table 1 Risk factors for Intra-operative fracture

From: The suitability of an uncemented hydroxyapatite coated (HAC) hip hemiarthroplasty stem for intra-capsular femoral neck fractures in osteoporotic elderly patients: the Metaphyseal-Diaphyseal index, a solution to preventing intra-operative periprosthetic fracture

Risk Factors Intra-operative Fracture (n = 71) No Fracture (n = 489) Uni-ANOVA Multi-Regression Analysis
    OR Chi 2 F (p) OR Chi 2 95%CI CST
Age (yrs +/-sd) 83 +/- 6.7 81 +/- 7.5 - 0.906 0.66, p = 0.91 1.5 0.135 0.004
(0.001-0.008)
0.98
Sex (Female %) 81.7% 82% 1.09
(0.57-2.08)
0.707 0.30, p = 0.81 0.05 0.933 0.002
(0.08-0.893)
0.93
Time to operation (Days +/- SEM) 1 +/- 3.3 1 +/- 3.3 - 0.328 0.07,
p = 0.7
0.8 0.875 0.005
(0.001-0.001)
0.99
Operator experience (Median, yrs +/- SEM) 8.31 +/- 6.9 7.7 +/- 6.3 - 0.455 0.44,
p = 0.7
0.8 0.453 0.002
(0.003-0.007)
0.99
Cemented 9 (12.7%) 144 3.62*
(1.61-8.10)
0.001* 11.7* , P < 0.001 3.4* 0.001* 0.133
(0.056-0.211)
0.98*
Uncemented 62 (87.3%)* 345        
  1. OR = Odds Ratio. F = Uni-ANOVA statistic. P < 0.05 * considered significant.
  2. CST = Colinearity Statistical Tolerance: (0-1). The higher the value, the less likely a Type I error has been committed.
  3. The table confirms that only the Uncemented stems are a risk factor for intra-operative fracture