Table 4.

Independent risk factors for readmission

Risk factor	Hazard ratio	SE (95% CI)	p value
Revision THA (versus primary)	1.84	0.4 (1.2–2.9)	0.007
Antibiotic spacer THA (versus primary)	1.85	0.6 (1.0–3.5)	0.062
Hospital stay over 5 days	3.26	0.7 (2.1–5.1)	<0.001
Diabetes with complications	11.55	6.8 (3.6–36.8)	<0.001
Cardiac valve disease	2.52	0.9 (1.3–5.1)	0.009
Substance abuse	2.05	0.9 (0.9–4.8)	0.094

CI = confidence interval.