Table 2

Sociodemographic characteristics of the study population

Variables	Cases						Controls
	Total		Male		Female		Total		Male		Female
	N	Per cent	N	Per cent	N	Per cent	N	Per cent	N	Per cent	N	Per cent
Age (years)
18–24	2134	1.0	803	0.9	1331	1.2	153	0.6	82	0.5	71	0.6
25–49	56 127	27.5	14 321	15.8	41 806	36.9	4761	17.7	2629	17.6	2132	17.7
50–64	73 748	36.1	34 658	38.2	39 090	34.5	7849	29.1	4629	30.9	3220	26.8
> 65	72 119	35.3	40 975	45.1	31 144	27.5	14 207	52.7	7618	50.9	6589	54.9
Race/skin colour
White	108 095	59.0	50 489	61.8	57 606	56.7	20 068	80.6	11 119	80.6	8949	80.6
Black/brown	74 208	40.5	30 792	37.7	43 415	42.8	4751	19.1	2624	19.0	2127	19.1
Indian/yellow	955	0.5	431	0.5	524	0.5	83	0.3	50	0.4	33	0.3
Schooling
Illiterate	21 482	14.6	8752	13.9	12 730	15.2	3183	15.8	1437	12.6	1746	20.0
≤8 years	97 588	66.5	43 747	69.7	53 811	64.1	13 538	67.2	7798	68.4	5740	65.6
>8 years	27 670	18.9	10 296	16.4	17 374	20.7	3427	17.0	2162	19.0	1265	14.5
Marital status
With a partner	118 502	60.1	61 721	70.8	56 731	51.7	15 760	60.2	10 187	70.2	5573	47.7
Without a partner	78 551	39.9	25 448	29.2	53 103	48.3	10 436	39.8	4332	29.8	6104	52.3
Region of residence
North	15 931	7.8	5533	6.1	10 398	9.2	1016	3.8	597	4.0	419	3.5
Northeast	34 334	16.9	12 431	13.7	21 903	19.4	4998	18.6	2857	19.2	2141	17.9
Centre west	4310	2.1	1734	1.9	2576	2.3	358	1.3	199	1.3	159	1.3
Southeast	94 134	46.3	42 973	47.5	51 161	45.3	12 452	46.4	6932	46.5	5520	46.2
South	54 765	26.9	27 767	30.7	26 998	23.9	8040	29.9	4320	29.0	3720	31.1
Smoking
Yes	97 788	47.9	58 342	64.3	39 446	34.8	8344	30.9	6032	40.3	2312	19.2
No	106 343	52.1	32 417	35.7	73 926	65.2	18 627	69.1	8927	59.7	9700	80.8
Alcohol consumption
Yes	51 752	29.2	38 698	48.1	13 054	13.5	4219	16.9	3600	26.3	619	5.5
No	125 684	70.8	41 716	51.9	83 968	86.5	20 750	83.1	10 106	73.7	10 644	94.5
Total	204 131	100	90 759	44.5	113 372	55.5	26 971	100	14 959	55.5	12 012	44.5