Table 1 Sample characteristics of N = 12,197 participants across two cohorts

Mental health problem

12.9

100.0

100.0

11.8^a

100.0

100.0

14.0^a

100.0

100.0

 Psychotherapy

^c

62.7

^c

62.8

^c

62.6

 No psychotherapy

^c

36.7

100.0

^c

36.4

^c

36.9

100.0

 No answer

^c

0.6

^c

0.8

^c

0.5

GP visit

72.1

82.2

84.4

71.4

83.5

85.9

72.8

81.1

83.2

 18–24

7.6

7.1

3.8

8.4^a

7.7

6.1^d

6.8^a

6.6

1.9^d

 25–34

11.8

12.6

11.6

12.2

11.3

8.0

11.4

13.7

14.6

 35–44

14.1

15.1

15.5

14.6

14.5

11.9^d

13.6

15.7

18.4^d

 45–54

19.7

24.0

22.0

20.5^a

26.6^b

24.5

18.9^a

21.8^b

20.0

 55–64

18.4

23.7

24.0

17.2

23.2

24.9

19.6

24.2

23.2

 65–74

14.6

8.6

9.7

14.0^a

8.5

11.1

15.5^a

8.7

8.6

 75+

13.8

8.8

13.4

13.0^a

8.2

13.4

14.5^a

9.4

13.3

Gender, women

52.6

64.2

61.6

52.8

65.6

63.6

52.3

63.0

60.0

 School, low

34.8

33.3

37.7

34.0

30.5^b

35.2

35.6

35.6^b

39.7

 School, middle

32.4

34.9

35.3

33.6

37.5

37.2

31.1

32.8

33.8

 School, high

31.9

31.3

26.6

31.7

31.6

27.5

32.1

31.0

25.8

 Degree

16.7

14.6

12.5

15.6^a

14.3

13.0

17.8^a

14.8

12.1

Single habiting

17.9

23.4

27.9

17.2^a

23.0

28.6

18.6^a

23.7

27.3

Health, poor

21.3

40.1

38.1

20.7

40.4

44.7^d

22.0

39.9

32.7^d

Rural residency

31.9

28.1

31.9

34.6^a

29.4

31.7

29.1^a

27.0

32.1