Table 1.

General characteristics of the subjects

		Male		Female		Total
		N*	%	N	%	N	%
Total (N)		2868		2541		5409
Age (years)	20-29	385	13.4%	548	21.6%	933	17.2%
	30-39	903	31.5%	630	24.8%	1533	28.3%
	40-49	793	27.6%	630	24.8%	1423	26.3%
	50-65	787	27.4%	733	28.8%	1520	28.1%
Body mass index (BMI) (n = 5393)	<23	1040	36.4%	1472	58.1%	2512	46.6%
	23-25	741	25.9%	489	19.3%	1230	22.8%
	≥25	1077	37.7%	574	22.6%	1651	30.6%
Dietary supplementation (n = 4590)	Yes	922	40.3%	1182	51.4%	2104	45.8%
	No	1368	59.7%	1118	48.6%	2486	54.2%
Physical activity	Yes	254	8.9%	223	8.8%	477	8.8%
	No	2614	91.1%	2317	91.2%	4931	91.2%
Drinking	Yes	2249	78.4%	1252	49.3%	3501	64.7%
	No	619	21.6%	1289	50.7%	1908	35.3%
Smoking status	None/ex-smoker	1553	54.1%	2372	93.3%	3925	72.6%
	Current smoker	1315	45.9%	169	6.7%	1484	27.4%
Marital status	Married	2324	81.0%	1910	75.2%	4234	78.3%
	Unmarried	544	19.0%	631	24.8%	1175	21.7%
Income (quartile)	Low	154	5.4%	216	8.5%	370	6.8%
	Middle low	739	25.8%	645	25.4%	1384	25.6%
	Middle high	1020	35.6%	837	32.9%	1857	34.3%
	High	955	33.3%	843	33.2%	1798	33.2%
Education	Less than elementary school	121	4.2%	285	11.2%	406	7.5%
	Middle school	183	6.4%	258	10.2%	441	8.2%
	High school	889	31.0%	831	32.7%	1720	31.8%
	More than college	1675	58.4%	1167	45.9%	2842	52.5%
Shift work	Yes	532	18.5%	437	17.2%	969	17.9%
	No	2336	81.5%	2104	82.8%	4440	82.1%
Stability of work	Permanent worker	2432	84.8%	1831	72.1%	4263	78.8%
	Temporary worker	436	15.2%	710	27.9%	1146	21.2%
Employment type	Part-time worker	167	5.8%	638	25.1%	805	14.9%
	Full-time worker	2701	94.2%	1903	74.9%	4604	85.1%
Occupation	Office worker	1427	49.8%	1232	48.5%	2659	49.2%
	Service worker	291	10.1%	598	23.5%	889	16.4%
	Manufacturing worker	1150	40.1%	711	28.0%	1861	34.4%
Working hours/week	<40	413	14.4%	963	37.9%	1376	25.4%
	40-52	1561	54.4%	1188	46.8%	2749	50.8%
	52-60	332	11.6%	188	7.4%	520	9.6%
	≥60	562	19.6%	202	7.9%	764	14.1%

*Unweighted count.