Table 1 Sociodemographic characteristics of the participants, globally and by NUTS (Nomenclature of Territorial Units for Statistics) 2 region

Total

100

34.1

20.4

26.7

12.3

6.4

(3763/3763)

(1285/3763)

(768/3763)

(1005/3763)

(463/3763)

(242/3763)

Median age (years)

41

39

41

42

43

43

 < 0.001* (H = 40.7, df = 4)

(IQR)

(31–48)

(30–47)

(29–48)

(31–50)

(34–50)

(35–50)

Male sex (%)

49.8

47.6

48.2

47.7

59.4

57.1

 < 0.001* (χ²  = 27.3, df = 4)

(1867/3749)

(609/1280)

(369/765)

(478/1003)

(274/461)

(137/240)

Education level^a

 Basic (1–4)

1.9

1.6

2.8

1.2

2.7

1.7

 < 0.001* (χ²  = 122.2, df = 16)

(69/3659)

(20/1240)

(21/749)

(12/983)

(12/451)

(4/236)

 Basic (5–9)

16.8

20.7

16.3

10.8

20.0

16.9

(615/3659)

(257/1240)

(122/749)

(106/983)

(90/451)

(40/236)

 Secondary (10–12)

44.1

43.5

43.9

39.4

51.9

51.7

(1612/3659)

(540/1240)

(329/749)

(387/983)

(234/451)

(122/236)

 Bachelor's

25.8

22.9

27.6

32.3

19.3

20.3

(944/3659)

(284/1240)

(207/749)

(318/983)

(87/451)

(48/236)

 MSc/PhD

11.5

11.2

9.3

16.3

6.2

9.3

(419/3659)

(139/1240)

(70/749)

(160/983)

(28/451)

(22/236)

Occupation

 Student

9.9

8.9

13.3

11.0

6.9

4.2

(295/2993)

(90/1015)

(84/630)

(88/797)

(25/361)

(8/190)

 Unemployed

3.4

4.3

3.3

3.3

1.1

3.2

(101/2993)

(44/1015)

(21/630)

(26/797)

(4/361)

(6/190)

 Employed^b

84.9

85.4

80.6

83.3

88.9

90.0

(2541/2993)

(867/1015)

(508/630)

(664/797)

(321/361)

(171/190)

  Armed forces (0)

2.2

1.5

2.8

2.1

2.8

4.1

 < 0.001* (χ²  = 128.9, df = 12)

(57/2541)

(13/867)

(14/508)

(14/664)

(9/321)

(7/171)

  Managers, professionals, and technicians (1–3)

46.0

42.7

43.1

59.8

35.5

34.5

(1169/2541)

(370/867)

(219/508)

(397/664)

(114/321)

(59/171)

  Clerical support, service, and sales (4–5)

30.4

29.3

28.3

25.0

38.6

49.7

(773/2541)

(254/867)

(144/508)

(166/664)

(124/321)

(85/171)

  Agriculture, craft, industry, and elementary (6–9)

21.3

26.5

25.8

13.1

23.1

11.7

(542/2541)

(230/867)

(131/508)

(87/664)

(74/321)

(20/171)

Travel abroad

 Yes (previous 2 years)

23.7

24.9

22.1

26.8

17.5

21.3

0.001* (χ²  = 17.9, df = 4)

(874/3689)

(310/1247)

(167/755)

(267/996)

(79/452)

(51/239)

 ≥ 1 Endemic country ^c

58.6

52.3

54.4

54.7

76.0

55.3

0.015* (χ²  = 12.4, df = 4)

(450/768)

(162/310)

(81/149)

(129/236)

(57/75)

(21/38)