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. 2023 Oct 11;23:228. doi: 10.1186/s12874-023-02053-w

Table 1.

Background characteristics (%)

Background population (n = 65,068) Baseline non-participants (n = 38,594) Baseline participants (n = 26,474) Baseline participants, participating in re-examination (n = 21,868) Baseline participants, not participating in re-examination (n = 4,606) Substitution approach to reconstruct background population Extrapolation approach to reconstruct background population
Socio-demographics
 Age
  50–59 36 38 33 31 39 36 43
  60–69 37 36 37 37 36 36 35
  70–77 28 26 30 31 26 27 22
 Legal sex
  Male 40 41 38 38 38 38 38
 Country of birth
  Sweden 79 73 88 89 83 85 80
 Civil status
  Married 55 52 61 62 55 57 50
 Education
  Primary 42 46 36 35 38 37 39
  Short secondary 28 26 30 30 30 30 30
  Long secondary 11 10 13 13 12 12 12
  Tertiary 19 17 22 22 20 21 19
 Employment status
  Employed 33 31 36 36 37 37 38
  Unemployed 8.6 10 5.8 5.6 7.0 6.5 7.9
 Sickness absence 3.5 3.9 2.8 2.5 4.0 3.5 4.9
  Retired 54 54 55 56 52 53 50
 Disposable income
  Quintile 1 20 23 16 16 17 16 17
  Quintile 2 20 22 17 17 19 18 20
  Quintile 3 20 20 20 20 21 20 21
  Quintile 4 20 18 23 24 22 23 21
  Quintile 5 20 17 24 25 22 23 20
Disease history
 Circulatory 16 17 16 16 17 16 18
  Diabetes 1.8 2.2 1.2 1.2 1.5 1.4 1.7
  Neoplasms 10 9.6 11 11 11 11 11
 Respiratory 5.7 6.1 5.1 5.0 5.9 5.6 6.5
  Digestive 13 12 13 13 15 14 16
  Mental 5.4 7.0 3.1 2.6 5.4 4.5 7.2
  MSE 10.7 13.6 4.4 5.4 8.4

Socio-demographics refer to December 31, 2000. Disease history refers to whether the individual was hospitalized for the disease type in question between January 1987 and August 2001. Throughout, individuals who had died or did not live in Sweden by September 1, 2001, were excluded. MSE refers to mean squared error, calculated across all prevalences in the table, in a comparison with the background population