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Table 5 Number (n) and percentage receiving disability benefit, association (odds ratio) with level of education among attendees and all invited. The Oslo Health Study 2000–2001.

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

Education * Attendees All invited
  n % Odds ratio (95% CI) n % Odds ratio (95% CI)
Men         
Age 40+45         
   Lower secondary 30 9.3 Ref.   143 14.4 Ref.  
   Upper secondary 41 3.3 0.34 (0.21 – 0.55) 159 5.0 0.31 (0.25 – 0.40)
   College/University 15 1.2 0.12 (0.06 – 0.23) 58 2.0 0.12 (0.09 – 0.17)
Age 59–60         
   Lower secondary 116 31.3 Ref.   318 38.9 Ref.  
   Upper secondary 142 15.5 0.40 (0.30 – 0.53) 338 20.0 0.39 (0.33 – 0.47)
   College/University 36 4.8 0.11 (0.08 – 0.17) 83 6.5 0.11 (0.08 – 0.14)
Women         
Age 40+45         
   Lower secondary 38 10.1 Ref.   119 13.8 Ref.  
   Upper secondary 77 5.0 0.47 (0.31 – 0.70) 199 6.7 0.45 (0.36 – 0.58)
   College/University 37 2.4 0.22 (0.14 – 0.36) 85 3.0 0.20 (0.15 – 0.26)
Age 59–60         
   Lower secondary 170 35.0 Ref.   396 39.7 Ref.  
   Upper secondary 224 19.9 0.46 (0.37 – 0.59) 449 23.7 0.47 (0.40 – 0.55)
   College/University 65 10.6 0.22 (0.16 – 0.30) 128 13.2 0.23 (0.18 – 0.28)
  1. * Testing of interaction between attendance and education in a logistic regression model including all men and women aged 40, 45, 59 and 60 years, and age and sex as covariates in addition to attendance and education, was not significant (p > 0.05).