Table 1 Sample characteristics stratified by gender (n = 2000) (n.a. = not available)

Sex

Male

967

(48.8)

48.6

Female

1033

(51.6)

51.4

Age*

18–29 years

335 (16.7)

190 (19.7)

145 (14.0)

17.2

18.1

16.5

30–45 years

550 (27.5)

250 (25.8)

300 (29.1)

24.7

25.8

23.6

46–65 years

644 (32.2)

302 (31.2)

342 (33.1)

33.4

34.4

32.4

≥ 66 years

471 (23.6)

226 (23.3)

245 (23.8)

24.7

21.7

27.6

BMI

<18.5 kg/m²

36 (1.8)

16 (1.7)

20 (2.0)

n.a.

n.a.

n.a.

18.5–24.99 kg/m²

1050 (53.9)

454 (47.7)

596 (59.8)

n.a.

n.a.

n.a.

>25 kg/m²

862 (43.1)

481 (50.6)

380 (38.2)

n.a.

n.a.

n.a.

Income groups household net income/month

(n = 1764)

(n = 868)

(n = 896)

<1500€

685 (38.8)

278 (32.0)

407 (45.4)

36.6

n.a.

n.a.

1500-3499€

936 (53.1)

502 (57.8)

434 (48.5)

55.4**

n.a.

n.a.

>3.500€

143 (8.1)

89 (10.2)

54 (6.1)

7.9***

n.a.

n.a.

Educational level

(n = 1973)

( n = 957)

(n = 1016)

No graduation

22 (1.1)

14 (1.4)

8 (0.8)

n.a.

n.a.

n.a.

10 years

350 (17.8)

153 (16.0)

197 (19.4)

39.3****

n.a.

n.a.

12 years

689 (34.9)

312 (32.6)

377 (37.1)

21.1

n.a.

n.a.

13 years

520 (26.4)

250 (26.2)

270 (26.5)

24.4

n.a.

n.a.

University degree

392 (19.9)

228 (23.8)

164 (16.2)

13.6

n.a.

n.a.