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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