Table I.

Mean number of symptoms (0–23) in an adult population according to demographic factors, lifestyle factors, and self-reported health.

	n	Mean (95% CI)		p-value
Gender:				< 0.001
Men	1455	5.1	(4.9–5.3)
Women	1772	6.7	(6.5–7.0)
Age groups:				<0.001
24–26	316	5.0	(4.5–5.4)
34–36	941	5.2	(4.9–5.5)
44–46	597	6.4	(6.0–6.8)
54–56	664	6.8	(6.4–7.2)
64–66	435	6.5	(6.1–7.0)
74–76 + 84–86	274	6.3	(5.8–6.8)
Civil status:				< 0.001
Married/cohabiting	2372	5.8	(5.6–6.0)
Separated/divorced	293	7.2	(6.6–7.8)
Widowed	146	6.9	(6.1–6.7)
Single	365	5.7	(5.2–6.2)
Education:				< 0.001
< 10 years	572	7.5	(7.1–7.9)
10–12 years	1520	6.3	(6.1–6.6)
University (1–4 yrs)	757	4.7	(4.4–4.9)
University (> 4 yrs)	346	5.0	(4.6–5.5)
Employment status:				< 0.001
Employed	2175	5.3	(5.1–5.5)
Homeworker	103	6.5	(5.6–7.5)
Unemployed	80	7.9	(6.8–9.1)
Long-term social
Security benefits	372	10.1	(9.6–10.6)
Retired	396	5.6	(5.2–6.1)
Student	84	4.4	(3.6–5.2)
Body mass index:				< 0.001
Underweight (≤ 20)	140	6.5	(5.7–7.3)
Normal (20.1–25.0)	1416	5.5	(5.3–5.8)
Overweight (25.1–29.9)	1193	6.0	(5.8–6.3)
Obese (≥ 30)	377	7.3	(6.8–7.8)
Smoking:				< 0.001
No	2367	5.6	(5.4–5.8)
Yes	835	7.0	(6.7–7.4)
Physical activity (per week):				< 0.001
> 4 h	635	5.5	(5.2–5.9)
2–4 h	1174	5.9	(5.6–6.1)
< 2 h	1053	6.2	(5.9–6.5)
None	311	6.8	(6.2–7.3)
Overall health:				< 0.001
Very good	781	2.3	(2.1–2.5)
Good	1308	5.1	(4.9–5.2)
Average	770	8.9	(8.6–9.2)
Poor	298	11.2	(10.7–11.7)
Very poor	50	13.4	(12.0–14.8)