Table 3.

Univariate and multivariate Cox regression analysis of factors influencing achievement of pad-free status

	Univariate analysis			Multivariate analysis
	HR	95% CI	P value	HR	95%CI	P value
Age ≤ 70 years	1.67	1.08–2.68	0.02	1.74	1.12–2.80	0.01
BMI ≤24	1.11	0.76–1.66	0.61
Nerve-sparing (bilateral vs. unilateral)	1.24	0.80–1.87	0.33
Institutional caseload > 200	1.86	1.28–2.71	<0.01	1.64	1.10–2.47	0.02
Use of HA/CMC	2.26	1.54–3.30	<0.01	1.84	1.22–2.76	<0.01