Table 1.

Characteristics of Participants in a Case-Control Study of Bladder Cancer, Spanish Bladder Cancer Study, 1998–2001

Characteristic	Cases (n = 686)		Controls (n = 750)		Odds Ratioa	95% Confidence Interval
	No.	%	No.	%
Sex
Male	603	87.9	652	86.9
Female	83	12.1	98	13.1
Mean age, years	64.57 (10.2)b		63.87 (10.0)
Geographical area
Alicante	58	8.5	66	8.8
Asturias	295	43.0	321	42.8
Barcelona	118	17.2	137	18.3
Manresa	26	3.8	26	3.5
Sabadell	62	9.0	55	7.3
Tenerife	127	18.5	145	19.3
High-risk profession
No	558	81.3	639	85.2	1.00	Reference
Yes	128	18.7	111	14.8	1.29	0.96, 1.74
Smoking status
Never smoker	128	18.7	272	36.3	1.00	Reference
Former smoker	276	40.2	315	42.0	2.64	1.89, 3.69
Current smoker	282	41.1	163	21.7	6.01	4.21, 8.58
Ptrend					<0.001
Quartile of fruit and vegetable consumption, g/dayc
0–421.8	166	29.5	137	24.9	1.00	Reference
>421.8–671.0	148	26.3	135	24.5	0.88	0.63, 1.23
>671.0–1,000.6	142	25.2	138	25.0	0.77	0.55, 1.08
>1,000.6	107	19.0	141	25.6	0.59	0.41, 0.83
Ptrend					0.023

^a Odds ratios from conditional logistic regression models stratified by matched set. Cases and controls were matched on sex, age (in 5-year groups), and geographical area.

^b Numbers in parentheses, standard deviation.

^c Numbers do not total 686 and 750 because of missing data (included in a separate category).