Table 4.

Binary logistic regression analysis showing odds ratio for resistance to the named antibiotic given the use of gentamicin-loaded bone cement compared to uncemented fixation at primary HIP surgery

Antibiotic	Univariate			Multivariate
	Odds ratio	95% CI	p value	Odds ratio	95% CI	p value
Ciprofloxacin	2.396	0.900–6.376	0.08	1.901	0.625–5.779	0.258
Clindamycin	2.333	0.392–13.875	0.352	0.573	0.022–14.767	0.737
Erythromycin	2.783	1.062–7.289	0.037*	2.329	0.795–6.826	0.123
Fusidic acid	0.954	0.376–2.421	0.921	0.974	0.333–2.847	0.961
Gentamicin	5.278	1.855–15.017	0.002**	8.341	2.297–30.292	0.001**
Methicillin	3.252	1.301–8.127	0.012*	3.87	1.319–11.359	0.014*
Penicillin	1.015	0.247–4.166	0.983	0.715	0.115–4.467	0.72
Tetracycline	1.783	0.533–5.961	0.348	2.476	0.624–9.832	0.198
Trimethoprim	1.845	0.615–5.535	0.275	2.682	0.729–9.872	0.138

*p < 0.05, **p < 0.01