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Table 1 Attrition across Surveys 1 to 5 in the ALSWH, for women born in 1921-26.

From: The impact of attrition on the representativeness of cohort studies of older people

Survey Respondent Dead Frail Withdrawn Lost to Follow Up
1 100.0% - - - -
2 83.9% 4.5% 0.8% 4.7% 6.1%
3 69.6% 9.9% 2.6% 9.0% 9.0%
4 57.6% 18.4% 4.4% 10.9% 8.7%
5 44.7% 28.4% 5.1% 11.4% 10.4%
  1. Total number of women at each survey is 12 432.