This page summarises data returns in the 4 Year In Home study, in which data were collected by means of home visits.
The figures shown in the table below are numbers of families (twin pairs).
Most of the figures in the table below are based on information logged in the TEDS admin database. However, figures for 'data in the dataset' are based on the final analysis dataset itself. Discrepancies between returns and actual data may arise because of logging errors, unusable data, and losses of data.
| Cohort (birth year of twins): | 1994 | 1995 | 1996 | TOTAL |
|---|---|---|---|---|
| Contacted to arrange visit | 366 | 347 | 279 | 992 |
| Visit completed | 303 | 285 | 250 | 838 |
| Percentage of contacted families visited | 82.8% | 82.1% | 89.6% | 84.5% |
| Data in the dataset (test data present for both twins) |
302 | 281 | 248 | 831 |