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Table 3 Stated willingness to participate in health studies by demographic characteristics

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

  General population row % Case-control study participants row % Cohort study participants row %
  Number Very unwilling/Unwilling Neutral Very willing/Willing p valuea Number Very unwilling/Unwilling Neutral Very willing/ Willing p valuea Number Very unwilling/Unwilling Neutral Very willing/Willing p valuea
Whole group 1546 11 28 61   153 1 5 93   401 13 69 319  
Male 653 12 30 58 0.047 93 2 2 96 0.182 375 3 65 297 0.469
Female 893 10 27 61   60 0 10 90   26 0 4 22  
Age <40 years 428 12 36 52 <0.001 0 0 0 0 0.992 3 0 67 33 0.056
     40–60 years 637 11 29 60   20 0 0 100   156 3 21 76  
     >60 years 475 10 20 70   132 2 6 92   241 3 14 83  
ATSIb: Yes 22 18 18 64 0.967 3 0 0 100 0.643 3 0 67 33 0.059
     No 1512 11 28 61   148 1 5 93   393 3 17 80  
Country of birth
 Australia 1181 11 27 61 0.495 107 1 7 93 0.511 285 3 18 79 0.483
 Other 359 11 31 59   45 2 2 96   116 3 15 82  
Highest level education
 School 650 13 26 61 0.218 74 2.7 7 91 0.356 183 2 16 82 0.400
 Technical/trade certificate 341 9 35 57   46 0 2 98   126 6 17 77  
 Tertiary 535 10 27 64   31 0 6 94   89 2 19 79  
 Other 10 10 20 70   0 0 0 0   0 0 0 0  
Remoteness index
 Metropolitan 870 11 30 59 0.291 94 1 6 93 0.373 272 4 17 79 0.680
 Inner regional 345 12 24 64   43 2 5 93   98 3 18 79  
 Outer regional/Remote 331 11 28 62   16 0 0 100   31 0 16 84  
SEIFA Relative Disadvantagec
 Quintile 1 most disadvantaged 217 15 29 57 0.287 3 0 0 100 0.928 39 5 23 72 0.618
 Quintile 2 312 9 29 62   20 0 5 95   73 1 8 90  
 Quintile 3 340 11 28 61   42 2 5 93   72 0 22 78  
 Quintile 4 293 10 31 59   33 3 6 91   97 6 19 75  
 Quintile 5 least disadvantaged 384 12 25 64   55 0 5 95   120 3 17 80  
Previously done health survey Yes 384 6 21 73 <0.001 153 1 5 94 - 401 3 17 80 -
         No 1107 13 30 57   0 0 0 0   0 0 0 0  
Previously refused health survey  Yes 166 19 33 48 <0.001 11 0 9 91 0.585 38 5 18 76 0.501
        No refusal 1329 10 27 63   135 0 5 95   355 3 17 81  
Long-term disease/disability Yes 481 9 23 68 0.002 65 2 2 97 0.131 115 4 16 80 0.967
      No 1150 12 30 59   85 1 8 91   278 3 18 80  
Spontaneously raised privacy/health issue during interview Yes 19 26 21 53 0.245 2 0 0 100 0.708 5 20 40 40 0.021
       No 1527 11 29 61   151 1 5 93   396 3 17 80  
  1. aA chi squared test for trend was used for comparing the numbers for all variables except age, Remoteness index and SEIFA for which ordinal logistic regression was used
  2. bATSI is the acronym for Aboriginal and 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