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Table 2 Potential Predictors of Internal fixation breakage

From: Are there too many screw holes in plates for fracture fixation?

Predictor B SE Wald P value HR 95% CI
Weight/not weight limbs -0.533 0.315 2.859 0.091 0.587 0.316 to 1.089
Type of broken plate -0.352 0.290 1.474 0.225 0.703 0.399 to 1.241
Breakage site within/outside the fracture line -0.143 0.278 0.266 0.606 0.866 0.502 to 1.494
Inserting screws closely adjacent to the fracture line 0.772 0.290 7.100 0.008* 2.165 1.227 to 3.822
Number of plate hole(s)    2.855 0.414     
   < 5 -0.993 0.649 2.343 0.126 0.370 0.104 to 1.321
  5–10 -0.459 0.379 1.468 0.226 0.632 0.301 to 1.328
  11–15 -0.442 0.331 1.781 0.182 0.643 0.336 to 1.230
Number of plate screw(s)    2.633 0.268     
   < 5 0.651 0.447 2.128 0.145 1.918 0.799 to 4.604
  5–10 0.194 0.317 0.374 0.541 1.214 0.652 to 2.260
  1. *P < 0.05 through multivariate Cox regression analysis