Table 5.

Multivariable logistic regression analysis for deep infection

Deep infection	Adjusted OR	p-value*	[95% Confidence Interval]
Transfused vs. Non-transfused	1.6	0.01	1.1 - 2.2
TKA vs. THA	0.6	<0.001	0.5 - 0.8
Duration ≥100 vs. <100 mins	1.0	0.84	0.7 - 1.5
Age (>70 vs. ≤70)	1.0	0.87	0.8 - 1.3
Female vs. Male	0.7	0.001	0.5 - 0.8
Pre-surgery risk factors:
One vs. None	1.2	0.3	0.9 - 1.6
Two or more vs. None	1.7	<0.001	1.3 - 2.2

* Wald's chi-squared statistic. Area under ROC curve: 0.70