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Table 2 The association (odds ratio) between selected sociodemographic variables and attendance (yes/no) in the Oslo Health Study 2000–2001. Crude odds ratio and adjusted for all variables by logistic regression.

From: The Oslo Health Study: The impact of self-selection in a large, population-based survey

 

Invited N

Attendance (%)

Crude odds ratio **

Adjusted odds ratio **

(95% CI)

Sex

     

   Men

19839

42.4

Ref.

Ref.

 

   Women

21035

49.3

1.32

1.51

(1.44–1.59)

 

40874†

45.9

   

Age

     

   30

11404

36.1

Ref.

Ref.

 

   40+45

14668

45.0

1.45

1.38

(1.30–1.47)

   59–60

8072

55.4

2.20

2.37

(2.19–2.55)

   75–76

6730

53.2

2.02

  
 

40874

45.9

   

Marital status

     

   Unmarried

14067

39.1

Ref.

Ref.

 

   Married

18083

51.6

1.66

1.31

(1.23–1.39)

   Widowed

2545

48.7

1.48

1.08

(0.90–1.30)

   Separated/divorced

5900

43.2

1.19

0.89

(0.82–0.96)

   Reg. partnership

111

46.8

1.38

1.38

(0.92–2.06)

 

40706

45.8

   

Country of birth

     

   Norway

33519

47.2

Ref.

Ref.

 

   Western countries

2422

42.2

0.82

1.06

(0.96–1.17)

   Non-western

4933

39.3

0.72

0.99

(0.92–1.07)

 

40874

45.9

   

Residential region

     

   Outer east

16696

50.3

Ref.

Ref.

 

   Outer west

10167

49.9

0.98

0.75

(0.71 – 0.80)

   Inner west

5939

40.4

0.67

0.62

(0.58 – 0.67)

   Inner east

6215

40.2

0.66

0.79

(0.74 – 0.85)

 

39017

47.1

   

Education

     

   Lower secondary

6766

39.5

Ref.

Ref.

 

   Upper secondary

16808

46.5

1.33

1.42

(1.32 – 1.53)

   College/University

14906

48.7

1.46

1.86

(1.71 – 2.01)

   Unknown

1504

24.2

0.49

0.58

(0.50 – 0.68)

 

39984

45.3

   

Total income (NOK)

     

   < 100 000

5014

34.3

Ref.

Ref.

 

   - 199 000

9490

42.9

1.44

1.46

(1.33 – 1.60)

   - 399 000

19473

49.2

1.85

1.82

(1.68 – 1.98)

   400 000+

6178

44.3

1.52

1.44

(1.30 – 1.59)

 

40155

45.1

   

Disability benefit*

     

   No

30918

44.0

Ref.

Ref.

 

   Yes

2689

38.7

0.80

0.66

(0.60 – 0.73)

 

33607

43.6

   

Single parent benefit*

     

   No

33138

43.7

Ref.

Ref.

 

   Yes

469

35.8

0.72

0.89

(0.73 – 1.09)

 

33607

43.6

   

Rehabilitation benefit*

     

   No

33156

43.6

Ref.

Ref.

 

   Yes

451

42.4

0.95

0.93

(0.76 – 1.14)

 

33607

43.6

   

Sickness benefit*

     

   No

32166

43.5

Ref.

Ref.

 

   Yes

1441

44.9

1.06

0.89

(0.79 – 1.00)

 

33607

43.6

   

Unemployment benefit*

     

   No

32716

43.7

Ref.

Ref.

 

   Yes

891

38.5

0.81

0.95

(0.82 – 1.10)

 

33607

43.6

   
  1. † Numbers differ a little from text due to updating of data register with respect to number of deaths before screening * The numbers are based on invited individuals below 75 years, to be able to include social security benefits ** The crude odds ratios are based on the total sample, while the adjusted odds ratios are estimated based on the total sample excluding those 75–76 years of age to be able to include social security benefits in the model.
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International Journal for Equity in Health

ISSN: 1475-9276

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