Table 1.

General characteristics of cases and controls.

Variables	Cases		Controls		p-Value
	n	%	n	%
Sex					<0.001
Men	308	67.1	1892	55.0
Women	151	32.9	1548	45.0
Age					<0.001
<59	140	30.5	1068	31.1
60–74	184	40.1	1784	51.9
>74	135	29.4	588	17.1
Educational level					<0.001
Less than primary education	138	30.1	651	18.9
Primary education	177	38.6	1153	33.5
Secundary education	96	20.9	951	27.7
University	48	10.5	685	19.9
Area of residence					<0.001
Asturias	14	3.1	194	5.6
Barcelona	100	21.8	1033	30.0
Cantabria	24	5.2	353	10.3
Granada	5	1.1	120	3.5
Huelva	15	3.3	155	4.5
León	123	26.8	440	12.8
Madrid	110	24.0	731	21.3
Murcia	1	0.2	7	0.2
Navarra	53	11.6	271	7.9
Valencia	14	3.1	136	4.0
First-degree family history					<0.001
Yes	71	15.5	208	6.1
No	363	79.1	3020	87.8
Unknown	25	5.5	212	6.2
Smoking habit					0.184
Never	186	40.5	1507	43.8
Former	161	35.1	1204	35.0
Current	111	24.2	711	20.7
Unknown	1	0.2	18	0.5
BMI					0.012
<25 kg/m2	112	24.4	1037	30.2
25–29 kg/m2	169	36.8	1155	33.6
≥30 kg/m2	99	21.6	586	17.0
Unknown	79	17.2	662	19.2