Table 3 Characteristics of all patients and those with a smoking history according to urinary pH levels after TURBT.

	All Pts			Pts with a smoking history			Pts with a smoking history (propensity matched)
	No. of pH < 6.0	No. of pH ≥ 6.0	P value	No. of pH < 6.0	No. of pH ≥ 6.0	P value	No. of pH < 6.0	No. of pH ≥ 6.0	P value
Age			0.219			0.025			0.353
Younger than 70 years	298	309		186	187		168	157
70 years or older	307	276		184	131		118	129
Sex			0.001			0.007			0.716
Male	521	462		354	288		271	269
Female	84	123		16	30		15	17
Smoking history			0.018			0.240			0.674
Positive	370	318		212	168		160	155
Negative	235	267		158	150		126	131
Grade			0.644			0.296			0.551
G1–2	374	354		232	187		173	166
G3	231	231		138	131		113	120
Pathological T stage			0.304			0.918			0.652
Ta	402	405		255	218		194	199
T1	203	180		115	100		92	87
Multiple			0.387			0.080			0.802
Yes	293	298		197	148		139	136
No	312	287		173	170		147	150
Concomitant CIS			0.568			0.749			0.260
Yes	71	75		40	32		24	32
No	534	510		330	286		262	254
Intravesical chemotherapy			0.111			0.958			0.771
Yes	59	42		33	28		25	27
No	546	543		337	290		261	259
BCG			0.919			0.573			0.615
Yes	311	299		191	171		154	148
No	294	286		179	147		132	138

NMIBC, non-muscle invasive bladder cancer; Pts, patients; No, number; CIS, carcinoma in situ; Chemo, chemotherapy.

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