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Table 2 Demographic characteristics of participants

From: A telephone survey of factors affecting willingness to participate in health research surveys

  Australian population % (ABS data) [2024] General population sample % n = 1559 Case-control study sample % n = 153 Cohort study sample % n = 401
  Aged ≥18    
Malea 49 42 61 94
Female 51 58 39 6
Agea 18–39 years 40 28 0 1
   40–60 years 34 41 13 39
   >60 years 26 31 87 60
ATSI:ab Yes 2.5 1 2 1
       No 97.5 99 98 99
Country of birtha     
 Australia 73 77 70 75
 Other 27 23 30 25
Highest level of educationa 25–64 years only    
 School 41 42 49 46
 Technical/trade certificate 35 22 30 32
 Tertiary 24 35 21 22
 Other - 1 0 0
Remoteness indexa     
 Metropolitan 69 56 61 68
 Inner regional 20 22 28 24
 Outer regional/Remote 12 21 10 8
SEIFA Relative Disadvantageac     
 Quintile 1 least advantaged 20 14 2 10
 Quintile 2 20 20 13 18
 Quintile 3 20 22 27 18
 Quintile 4 20 19 22 24
 Quintile 5 most advantaged 20 25 36 30
Previously done health survey  Yes   26 100 100
              No   74 0 0
Previously refused health survey Yes   11 8 10
              No refusal   89 92 90
Long-term disease/disability      Yes   25 43 30
              No   75 56 71
  1. aChi squared test p < 0.05 of comparison between the Australian population (column 2) and the general population sample (column3)
  2. bAboriginal or Torres Strait Islander
  3. cSEIFA, Socio-Economic Indexes for Areas is an aggregate score of relative socio-economic disadvantage; the lower the score the higher the relative disadvantage