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Table 3 Comparison of participants and non-participants in the PRO-AGE study at the three study sites

From: The PRO-AGE study: an international randomised controlled study of health risk appraisal for older persons based in general practice

  London (U.K.)   Hamburg (Germany) *   Solothurn (Switzerland)  
  Participants Non-participants P-value Participants Non-participants P-value Participants Non-participants P-value
Randomised study
Age (years) 74.6 ± 6.3 (2503) 75.7 ± 7.3 (1292) <.0001 71.8 ± 7.6 (2580) 71.3 ± 8.1 (1234) 0.10 74.5 ± 6.0 (2284) 74.8 ± 6.8 (1098) 0.68
Female gender 54.9% (1375/2503) 58.3% (753/1292) 0.12 62.7% (1617/2580) 62.1% (821/1322) 0.70 56.6% (1293/2284) 52.7% (579/1098) 0.03
Concurrent comparison group
Age (years) 74.9 ± 6.5 (636) 75.9 ± 7.5 (667) 0.01 72.0 ± 8.2 (746) 71.3 ± 8.5 (631) 0.31 74.2 ± 6.0 (1171) 75.1 ± 6.8 (687) 0.01
Female gender 57.6% (366/636) 57.4% (383/667) 0.63 68.1% (508/746) 63.7% (690/1084) 0.001 57.0% (667/1171) 60.0% (412/687) 0.32
  1. PRO-AGE: PRevention in Older people – Assessment in GEneralists' practices
  2. Values are percentages (nominator/denominator) or means ± standard deviations (denominator).
  3. P-values based on multivariable logistic regression models including age and gender.
  4. * In Hamburg, information on age and gender was in part missing amongst non-participants due to state-mandated data protection regulations.