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.

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


† 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.

Søgaard et al. International Journal for Equity in Health 2004 3:3   doi:10.1186/1475-9276-3-3