Table 1 Daily activity and education levels in rotating (day/night) shift workers and daytime workers (men and women analyzed separately)

Shift workers

(n = 54)

Daytime workers

(n = 67)

Shift workers

(n = 180)

Daytime workers

(n = 180)

Daily worktime (hours)

8.44 ± 1.42**

8.67 ± 1.29

8.22 ± 0.99**

8.25 ± 1.10

Duration of employment (years)

14.3 ± 7.2

16.6 ± 12.6

12.8 ± 7.9***

19.0 ± 11.6

Feature of work (%)

mental/light physical/heavy physical

1.8/84.9/13.3***

80.6/19.4/0

0.6/97.7/1.7***

77.6/22.4/0

Duration of sleeping in a workday (hours)

6.3 ± 0.9**

6.9 ± 0.9

6.2 ± 0.9***

7.0 ± 1.1

Duration of sleeping in a non-working day (hours)

7.6 ± 1.8**

8.0 ± 1.0

7.6 ± 1.1***

8.1 ± 1.3

Sport activity

yes/no (%)

31.4/68.6

46.3/53.7

17.3/82.7***

35.9/64.1

Weekly sport activity (min)

44.0 ± 95.6*

75.6 ± 102.8

21.9 ± 66.6***

40.0 ± 74.4

Smokers (%)

never/ex smokers/current smokers

57.5/16.6/25.9

53.8/32.8/13.4

46.1/16.1/37.8***

66.4/11.7/21.7

Coffee consumption

(dose/day)

1.9 ± 1.3**

1.1 ± 1.1

1.9 ± 1.2**

1.6 ± 1.3

Education level (%)

low/middle/high

12.9/85.2/1.9***

1.4/34.4/64.2

22.9/76.6/0.5***

2.7/45.6/51.7