Table 3.

Univariable Cox regression analysis after the LASSO regression analysis, without tumor invasion locations.

Variables	N	HR	95% CI	p
BMI				0.214
<25	161
≥25	138	0.723	[0.434,1.206]
T category				0.002
Ta	181	1 (reference)
T1	118	2.206	[1.332,3.652]
Prior recurrence status				<0.001
Primary	264	1 (reference)
Recurrent	35	3.369	[1.941,5.847]
Tumor number				0.016
Single	146	1 (reference)
Multiple	153	1.911	[1.127,3.241]
Gross hematuria				0.171
No	60	1 (reference)
Yes	239	1.682	[0.800,3.538]
Times of IVI				<0.001
0-1	36	1 (reference)
2-12	56	0.534	[0.296,0.961]	0.036
>12	207	0.081	[0.043,0.152]	<0.001
SII				0.003
<525.26	215	1(reference)
≥525.26	84	2.17	[1.308,3.599]

HR, hazard ratio; CI, confidence interval; BMI, body mass index, weight/height²; IVI,intravesical instillation; PLR, platelet-lymphocyte ratio; SII, systemic immune-inflammation index,platelet* neutrophil/lymphocyte; De Ritis ratio, aspartate transaminase/alanine transaminase. Bolded p-values indicate statistically significant correlations (p < 0.05).