表 4. Multivariate Cox regression of recurrence-free survival in the NMIBC cohort and BCG group.

NMIBC队列与BCG亚组无复发生存的多因素Cox分析

Clinicopathological variable	Total patients (n=93)			BCG group (n=72)
	P	Hazard ratio (95%CI)		P	Hazard ratio (95%CI)
CI: Confidence interval. NMIBC, BCG, EPI, recurrent≤1 rec/year, recurrent>1 rec/year: Note the same as table 1.
Gender (female)
Male	0.275	0.409 (0.082−2.035)		0.688	0.689 (0.121−4.044)
Age (≤60 yr.)
60−70 yr.	0.916	1.061 (0.353−3.191)		0.860	1.145 (0.254−5.164)
>70 yr.	0.945	1.060 (0.207−5.438)		0.812	0.786 (0.107−5.754)
Smoking history (no)
Yes	0.355	1.536 (0.618−3.817)		0.700	1.339 (0.303−5.923)
Prior recurrence rate (primary)
Recurrent≤1 rec/year	0.036	3.863 (1.095−13.636)		0.087	6.876 (0.754−62.671)
Recurrent>1 rec/year	0.001	13.347 (4.645−38.356)		0.001	53.506 (6.452−443.698)
T stage (Ta)
T1	0.648	1.337 (0.384−4.649)		0.484	1.570 (0.444−5.548)
Grade (low grade)
High grade	0.230	1.787 (0.692−4.613)		0.256	2.099 (0.584−7.547)
Tumor size (<3 cm)
≥3 cm	0.435	1.642 (0.478−5.572)		0.046	4.998 (1.027−24.333)
Amount of tumors (≤3)
>3	0.402	1.520 (0.517−4.051)		0.777	0.793 (0.159−3.956)
Treatment group (BCG)
EPI	0.020	2.851 (1.182−6.881)		−	−