Table 3.

Bladder Cancer Odds Ratio and 95% Confidence Interval for Smoking Status, Adjusted for Area, Sex, Age, and a Component for Random Interviewer Effects, Spain, June 1998–June 2001

Smoking	All Subjects (N  = 2,394)		Overall Quality of Interview Score
			Unsatisfactory/Questionable (n  = 195)		Reliable (n  =  1,810)		High (n  = 389)
	Odds Ratio	95% Confidence Interval	Odds Ratio	95% Confidence Interval	Odds Ratio	95% Confidence Interval	Odds Ratio	95% Confidence Interval
Never	1.00		1.00		1.00		1.00
Occasional	1.42	0.93, 2.18	0.95	0.22, 4.07	1.40	0.86, 2.29	2.60	0.80, 8.51
Former	3.27	2.43, 4.40	4.79	1.71, 13.40	3.13	2.21, 4.43	4.48	2.12, 9.44
Current	6.18	4.56, 8.39	3.20	1.13, 9.04	6.86	4.80, 9.82	7.70	3.64, 16.30
			Smoking Section Quality Score
			Unsatisfactory/Questionable (n = 220)		Reliable (n  = 1,687)		High (n  = 485)
			Odds Ratio	95% Confidence Interval	Odds Ratio	95% Confidence Interval	Odds Ratio	95% Confidence Interval
Never			1.00		1.00		1.00
Occasional			2.69	0.61, 11.83	1.44	0.87, 2.39	1.36	0.45, 4.10
Former			2.68	1.00, 7.14	3.35	2.31, 4.84	4.14	2.20, 7.78
Current			2.54	0.94, 6.88	7.21	4.92, 10.56	7.87	4.11, 15.07