Table 1.

Main characteristics of the studied sample

Variables	Men		Women		Total
	N	%	N	%	N	%
Total	8983	48.7%	9467	51.3%	18450	100.0%
Age
Mean, (SD)	48.9	17.7	51.0	18.7	50.0	18.2
< 30	1281	14.3%	1243	13.1%	2524	13.7%
30–39	1749	19.5%	1707	18.0%	3456	18.7%
40–49	1829	20.4%	1766	18.7%	3595	19.5%
50–59	1521	16.9%	1543	16.3%	3064	16.6%
60–69	1293	14.4%	1369	14.5%	2662	14.4%
70–79	850	9.4%	1148	12.1%	1998	10.8%
80–89	425	4.7%	588	6.2%	1013	5.5%
≥ 90	35	0.4%	103	1.1%	138	0.8%
Education level
Low	1956	21.8%	2347	24.8%	4303	23.3%
Middle	4155	46.2%	4127	43.6%	8282	44.9%
High	2872	32.0%	2993	31.6%	5865	31.8%
Social class
Low	4122	45.9%	4498	47.5%	8620	46.7%
Middle	3138	34.9%	3146	33.2%	6284	34.1%
High	1723	19.2%	1823	19.3%	3546	19.2%
BMI
< 25	3204	35.7%	5103	53.9%	8307	45.0%
25–30	4129	46.0%	2813	29.7%	6942	37.6%
> 30	1650	18.3%	1551	16.4%	3201	17.4%
Chronic conditions diagnosed
Acute myocardial infarction	287	3.2%	108	1.1%	395	2.1%
Other heart diseases	606	6.8%	629	6.6%	1235	6.7%
Arthrosis, arthritis or rheumatism	2443	27.2%	4115	43.5%	6558	35.5%
Chronic bronchitis, emphysema, COPD	488	5.4%	466	4.9%	954	5,2%
Diabetes	764	8.5%	716	7.6%	1480	8.0%
Cirrhosis, hepatic dysfunction	111	1.2%	98	1.0%	209	1.1%
Mental health problems	662	7.4%	1651	17.4%	2313	12.5%
Stroke	136	1.5%	112	1.2%	248	1.3%
Number of chronic conditions diagnosed
None	5393	60.0%	4466	47.2%	9859	53.5%
One or two	2313	25.8%	3008	31.8%	5321	28.8%
More than two	1277	14.2%	1993	21.0%	3270	17.7%

SD standard deviation, BMI body mass index, COPD chronic obstructive pulmonary disease