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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