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Table 5 Prevalence ratio and absolute difference (%) of participation (n = 50 807) versus no participation*(n = 36 135) in the HUNT3 main questionnaire by different characteristics

From: The HUNT study: participation is associated with survival and depends on socioeconomic status, diseases and symptoms

Characteristic

Prevalence ratio

Difference in participation (%)

 

Crude

Adjusted

95% CI

Crude

Adjusted

95% CI (%)

Sex (women/men)

1.17

1.23

1.20, 1.26

9.2

12.6

11.8,13.3

20-39 year

1

1

Reference

0

0

Reference

40-59 year

1.63

1.45

1.40, 1.50

25.2

19.1

18.2, 20.0

60-79 year

1.88

1.74

1.68, 1.81

34.7

29.9

29.0, 30.8

80 + yrs

1.12

1.23

1.16, 1.30

4.8

10.7

9.2, 12.1

Education

9 year or less

1

1

Reference

0

0

Reference

10-12 year

1.28

1.27

1.23, 1.30

13.6

13.6

12.8, 14.5

University

1.39

1.36

1.31, 1.41

19.0

17.4

16.4, 18.4

Marital status

Unmarried

1

1

Reference

0

0

Reference

Divorced/Widower

1.27

1.01

0.97, 1.05

11.6

−1.8

−3.0, -0.6

Married/cohabits

1.64

1.29

1.25, 1.33

27.3

14.5

13.5, 15.4

Income

Quintile 1

1

1

Reference

0

0

Reference

Quintile 3

1.39

1.32

1.09, 1.60

15.9

15.1

10.0, 20.1

Quintile 5

1.49

1.42

1.17, 1.73

20.4

20.4

15.6, 25.1

Municipality

Urban / rural

0.93

0.91

0.89, 0.93

6.1

−5.6

−6.4, -4.7

Social security #

Disability pension

0.97

0.92

0.88, 0.96

−19.2

−6.5

−7.8, -5.2

Social benefit

0.43

0.61

0.56, 0.67

−32.8

−17.9

−20.2,-15.5

  1. *Participants that answered the nonparticipation questionnaire (QNP) were not included.
  2. ¤ Binomial regression, adjusted for all other variables except social security factors.
  3. #Analysis restricted to subjects below 65 years of age and all variables entered in the adjusted model.