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Table 1 Stratified sample for RCT

From: A randomised controlled trial comparing opt-in and opt-out home visits for tracing lost participants in a prospective birth cohort study

Strata Mother/YP Gender Education Eligible participantsa Number in trial
1 Mother - Low 100 60
2 Mother - High 117 60
3 YP M Low 52 50
4 YP F Low 40 40
5 YP M High 61 50
6 YP F High 42 40
  1. afor whom we have found a ‘likely’ address in the Bristol area