Table 2. Distribution of demographic variables among subjects in the Central and Eastern European Renal Cancer study.

	Cases		Controls		p-value
	N	%	N	%
All subjects	987		1298
Center
Bucharest, Romania	91	9.2	132	10.2
Lodz, Poland	81	8.2	197	15.2
Moscow, Russia	288	29.2	368	28.4
Czech Republic1	527	53.4	601	46.3	<.0001
Sex
Male	589	59.7	838	64.6
Female	398	40.3	460	35.4	0.02
Age at Interview (y)
<50	163	16.5	228	17.6
≥50	824	83.5	1070	82.4	0.51
Smoking Status
Never	454	46.1	528	40.7
Former	225	22.9	316	24.4
Current	305	31.0	452	34.9	0.03
Body Mass Index (kg/m2)
<25	288	29.2	457	35.4
25–30	429	43.5	556	43.1
30+	270	27.4	278	21.5	0.001
Family history of cancer2
No	654	66.3	932	71.8
Yes	333	33.7	366	28.2	0.004
Self-Reported Hypertension
No	539	54.7	800	61.7
Yes	447	45.3	497	38.3	0.001

¹Four centers: Brno, Olomuc, Prague, and Ceske.

²First degree relative with any cancer.