Table 1.
Girls in the RIPPLE and SHARE datasets: sample selection and characteristics
| RIPPLE N | SHARE N | Combined N | |
|---|---|---|---|
| Responded at baseline | 4,248 | 3,794 | 8,042 |
| Responded at age 16 follow-up | 3,230 | 3,118 | 6,348 |
| Reported intercourse at age 16 follow-up | 1,222 | 1,279 | 2,501 |
| Excluded: not asked questions on pregnancy | −368 | ||
| Excluded: not asked questions on contraception at FSI | −51 | ||
| Eligible sample | 1,222 | 860 | 2,082 |
| Modeling sample (complete information on pregnancy) | 1,109 | 843 | 1,952 |
| Composition of modelling sample (weighted percentages) | % | % | % |
|---|---|---|---|
| Ethnic group | |||
| White | 90 | 98 | 93 |
| Black | 1 | 0 | 1 |
| Asian | 0 | 0 | 0 |
| Other | 9 | 2 | 6 |
| Family structure | |||
| Live with both biological parents | 62 | 57 | 60 |
| Live with one or neither biological parent | 38 | 43 | 40 |
| Deprivation scorea | |||
| Zero | 28 | 18 | 24 |
| One | 31 | 27 | 30 |
| Two | 26 | 31 | 28 |
| Three or four | 15 | 23 | 18 |
FSI = first sexual intercourse.
a
Deprivation: count of social housing, father left school at 16, mother left school at 16, neither parent in FT employment.