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. 2019 Jan 21;7(1):35–40. doi: 10.1016/j.esxm.2018.11.007

Table 2.

Multivariate Cox Proportional hazards of IPP infection

Variable Initial Implant Surgery
N = 14,969
Implant Revision Surgery
N = 454
HR (95% CI) P value HR (95% CI) P value
Age (continuous) 0.98 (0.97–0.99) .003 1 (0.96–1.04) .86
Race (%)
 White Ref Ref Ref Ref
 Non-white 1.19 (0.94–1.51) .14 1.1 (0.49–2.45) .81
Elixhauser Comorbidity Index
 0 Ref Ref
 1 1.04 (0.80–1.34) .77 0.76 (0.29–1.99) .58
 >1 1.28 (0.84–1.94) .25 0.65 (0.09–4.96) .68
Insurance
 Private Ref Ref Ref Ref
 Medicaid/Other gov 1.54 (1.20–1.98) .001 0.80 (0.18–3.52) .77
 Medicare 1.54 (1.04–2.28) .032 0.85 (0.34–2.17) .74
Diabetes 1.32 (1.05–1.66) .016 1.27 (0.55–2.92) .58
Era: Postantibiotic-coated vs Preantiobiotic-coated 0.46 (0.36–0.59) <.001 1.16 (0.45–2.98) .76
Annual surgeon volume
 >31 Ref Ref Ref Ref
 0–2 2.41 (1.64–3.54) <.001 3.18 (0.69–14.74) .14
 3–7 2.48 (1.69–3.64) <.001 4.00 (0.86–18.58) .08
 8–31 2.06 (1.37–3.09) <.001 2.57 (0.48–13.72) .27

The bold values correspond specifically to Diabetes as the variable with infection.

HR = hazard ratio; IPP = inflatable penile prosthesis.

Excluding diabetes.