Table 5.
Participation rate in specific data collection undertaken in subgroups. ELFE study 2011–16
| Dust collection | Home visit | Home dust sampling | Accelerometry | Biologyb | Nursery school |
|||
|---|---|---|---|---|---|---|---|---|
| Teacher | Doctor | |||||||
| Age | Birth-2 months | 3.5 years | 3.5 years | 3.5 years | Birth 2011 | 3.5 years | 3–4 years | 4–5 years |
| 2011 | 2014–15 | 2014–15 | 2014–15 | 2014–15 | 2014–16 | 2016 | ||
| Eligiblea | 6390 | 11 453 | 1035 | 595c | 9053 | 3415 | 10 553 | 4458 |
| Participants | 3217 | 9293 | 837 | 463 | 5903 | 2125 | 5178 | 3124 |
| % of eligible | 51% | 81% | 81% | 78% | 65% | 62% | 49% | 70% |
| % of initial inclusions | 18% | 52% | 5% | 3% | 33% | 12% | 28% | 17% |
a
Defined as numbers of families with selection criteria who were effectively proposed to participate at the substudy.
b
Participants = numbers with at least one biological samples.
c
Defined by the availability of an accelerometer 15 days before home visit for the 2390 families who agreed to participate (65% of those contacted).