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Table 4 Poisson proportional hazard ratios for all-cause mortality and occupational sitting time (as continuous variable)

From: Temporal changes in occupational sitting time in the Danish workforce and associations with all-cause mortality: results from the Danish work environment cohort study

 

All-cause mortality

 

Follow-up 1991–2010a

Follow-up 2001–2010b

 

HR

95 % CI

HR

95 % CI

Occupational sitting time (per 10 hr/wk increase)

0.97

0.91; 1.05

1.09

0.97; 1.23

Age (years)

    

 21–40

1.00

Reference

1.00

Reference

 40–49

3.74

2.31; 6.06

4.36

2.00; 9.49

 50–59

9.98

6.38; 15.63

9.08

4.32; 19.09

 60–69

23.69

15.18; 36.98

21.56

10.27; 45.35

  ≥ 70

51.67

31.92; 83.63

59.56

24.08; 147.30

Gender

    

 women

1.00

Reference

1.00

Reference

 Men

1.63

1.35; 1.95

1.41

1,00; 1.98

Socio-economic status

    

 social class I (highest)

1.00

Reference

1.00

Reference

 social class II

1.13

0.80; 1.58

1.37

0.76; 2.46

 social class III

1.31

0.96; 1.78

1.64

0.96; 2.80

 social class IV

1.19

0.81; 1.74

1.30

0.68; 2.52

 social class V (lowest)

1.81

1.31; 2.49

2.02

1.15; 3.55

BMI (kg/m2)

    

 normal (<25)

  

1.00

Reference

 overweight (25- <30)

  

0.83

0.59; 1.16

 obese (30+)

  

0.86

0.52; 1.41

Smoking

    

 never

  

1.00

Reference

 former

  

1.34

0.87; 2.05

 current

  

2.00

1.36; 2.96

Leisure time physical activity (<2 h/wk of light intensity)

    

 No

  

1.00

Reference

 Yes

  

1.37

0.95; 1.99

At least daily fruit or vegetable consumption

    

 No

  

1.00

Reference

 Yes

  

0.61

0.44; 0.85

  1. aAdjusted for age, gender, socio-economic status and calendar year
  2. bAdjusted for age, gender, socio-economic status, BMI, smoking, leisure time physical activity and fruit and vegetable consumption