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. Author manuscript; available in PMC: 2019 Apr 1.
Published in final edited form as: J Arthroplasty. 2017 Nov 21;33(4):1154–1159. doi: 10.1016/j.arth.2017.11.029

TABLE 6.

Predictors of treatment failure in univariable and multivariable Cox proportional hazards models

Unadjusted Adjusted

Covariate Hazard Ratio (95% CI) p-value Hazard Ratio (95% CI) p-value

Age 0.987 (0.972, 1.001) 0.0758

BMI 1.024 (1.004, 1.046) 0.0203

Gender 0.3385
 Male -reference level-
 Female 1.203 (0.824, 1.755)

CCMI 0.909 (0.837, 0.986) 0.0220

DM 0.942 (0.517, 1.718) 0.8458

RA 1.189 (0.637, 2.219) 0.5861

ASA Score 0.9255
 1 or 2 -reference level-
 3 1.028 (0.627, 1.684)
 4 1.116 (0.617, 2.017)

Host Score 0.4575
 A -reference level-
 B 1.141 (0.656, 1.984)
 C 1.530 (0.756, 3.097)

Days Symptomatic 0.0041 0.0021
 <1 week -reference level- -reference level-
 2–4 weeks 1.771 (1.151, 2.275) 1.680 (1.067, 2.645)
 >4 weeks 2.093 (1.276, 3.434) 2.345 (1.421, 3.871)

Primary Organism 0.0403 0.0207
 Staph Aureus -reference level- -reference level-
 Culture Negative 1.258 (0.570, 2.777) 1.282 (0.561, 2.929)
 Other 0.636 (0.429, 0.943) 0.595 (0.399, 0.889)