Table 3. Univariate and multivariable analysis of predictors of treatment failure, evaluating any prior treatment vs. none.

Parameter	Univariate	P*	Multivariable	P
Age at balloon dilation, per year	1.02 (0.99–1.06)	0.1	–	–
Distal bulbar stricture, yes/no	2.74 (0.75–9.99)	0.1	–	–
History of STI or UTI, yes/no	3.17 (1.18–8.55)	0.02	1.83 (0.56–5.91)	0.3
Presented with hematuria, yes/no	3.23 (1.21–8.62)	0.02	3.00 (0.94–9.60)	0.06
Prior treatments, per procedure	1.36 (1.12–1.64)	0.0003	1.34 (1.10–1.64)	0.0005
Stricture length, per cm	0.97 (0.40–2.35)	0.9	–	–

Parameters meeting statistical significance on univariate analysis were included in the multivariable model. For each parameter, odds ratios are presented with 95% confidence intervals. *, P values differ slightly from those in Tables 1 and 2 due to likelihood ratio tests being used for univariate and multivariable analysis here. STI, sexually transmitted infection. UTI, urinary tract infection.