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Table 2 Attrition rates per sample and wave

From: Frailty effects on non-demented cognitive trajectories are moderated by sex and Alzheimer’s genetic risk

  Wave 1 Wave 2 Wave 3
  Return Non Return Return Non Return
Sample One n 58 49 9 (15.5%) 38 11 (22.4%)
Sample Two n 179 146 33 (18.4%)
Sample Three n 394 333 61 (15.4%) 300 33 (10%)
  1. Note. Results presented as n (% attrition). Due to ongoing data collection, Sample two did not contribute a third data point to this study