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Table 1 Characteristics of participants at waves 1, 3, 6 and 7

From: Self-medication with over-the-counter drugs and complementary medications in South Australia's elderly population

  1992-1993 1994-1995 2000-2001 2003-2004
  Wave 1 N = 2087 Wave 3 N = 1679 Wave 6 N = 791 Wave 7 N = 487
Variable N % N % N % N %
Age (years)         
   65-79 1224 58.6 893 53.2 216 27.3 47 9.7
   80+ 863 41.4 786 46.8 575 72.7 440 90.3
Gender         
   Female 1031 49.4 854 50.9 456 57.6 303 62.2
   Male 1056 50.6 825 49.1 335 42.4 184 37.8
Education
(Age when left school)
        
   <14 years 336 16.3 262 15.4 105 13.3 65 13.4
   ≥ 14 years 1725 83.7 1399 84.6 684 86.7 420 86.6
   Missing 26   18   2   2  
Tertiary education         
   Yes 700 33.9 570 34.2 278 35.2 177 36.5
   No 1367 66.1 1096 65.8 512 64.8 308 63.5
   Missing 20   13   1   2  
Income Level         
   <$12,000 686 35.5 559 40.9 165 30.3 116 35.6
   $12,000 - $30,000 1083 56.1 719 52.6 312 57.4 146 44.8
   >$30,000 161 8.3 90 6.6 67 12.3 64 19.6
   Missing 157   311   247   161  
Self-rated health         
   Excellent 191 9.2 129 8.2 64 9.8 16 3.9
   Very Good 599 28.8 410 25.9 181 27.7 85 20.5
   Good 633 30.4 534 33.8 224 34.3 171 41.2
   Fair 477 22.9 403 25.5 147 22.5 113 27.2
   Poor 181 8.7 106 6.7 37 5.7 30 7.2
   Missing 6   97   138   72  
  1. Missing data are not included in the calculation of the percentages