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Table 1 Number and participation rate according to age and gender in The Oslo Health Study in 2000–2001

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

  Number of participants * Participation rate (%)
Age (yrs) Men Women All Men Women All
30 1826 2288 4114 32.2 39.9 36.1
40 1547 1905 3452 37.6 50.1 43.7
45 1389 1757 3146 39.9 53.5 46.5
59–60 2117 2357 4474 53.4 57.3 55.4
75–76 1525 2059 3584 58.2 50.0 53.2
All 8404 10366 18770 42.4 49.3 45.9
  1. * Number attending the survey and/or submitting at least one of the questionnaires.