Table 1 Baseline characteristics of men and women included between 2012 and 2017 and 2012–2016, respectively in the CONSTANCES cohort

 Mean (SD) age, years

43.8 (10.9)

43.3 (10.9)

44.2 (10.9)

43.6 (10.9)

  Low

34.8

41.0

34.0

40.6

  Medium

25.2

32.5

25.5

32.7

  High

40.0

26.5

40.5

26.7

  Levels 0 to 1

3.0

2.1

3.0

2.1

  Level 2

3.6

3.7

3.7

4.0

  Levels 3 to 4

32.4

27.4

32.7

27.9

  Levels 5 to 6

31.3

41.9

31.2

41.7

  Levels 7 to 8

29.7

24.9

29.4

24.3

   < 2100

17.9

22.2

17.6

22.4

  2100–2800

14.6

16.1

14.8

16.2

  2800–4200

33.1

32.8

32.5

32.5

   > 4200

34.4

28.9

35.0

28.9

 Depression^a, %

9.6

17.8

9.9

18.1

  Do you have (or have you had) work and travel times requiring you not to sleep at night at least 50 days/year? -Yes, %

9.7

6.2

9.7

5.4

  Do you have (or have you had) work and travel times requiring you to go to bed after midnight at least 50 days/year? -Yes, %

15.1

8.3

15.2

8.3

  Do you work (or have you worked) more than one in two Sundays during the year? -Yes, %

13.2

14.5

13.2

14.4

  Do you work (or have you worked) more than one in two Saturdays during the year? -Yes, %

25.5

28.4

25.5

28.3

  Do you work the same number of hours each day? -No, %

47.5

49.7

46.9

49.2

  Do you work the same number of days each week? -No, %

23.2

24.4

23.2

24.0

  Do you work fixed hours? -No, %

42.5

36.0

42.0

35.8