Table 1.
Prevalence and amount of data available for each outcome and potential predictor measured during pregnancy
| Response sample* | Analysis sample† | Imputed sample‡ | ||||||
|---|---|---|---|---|---|---|---|---|
| Depression, 8 weeks | Never breastfed | Feelings of poor attachment | Feelings of hostility, 47 m | NEET, 61 m | ||||
| N = 10,070 | N = 7,976 | N = 8,253 | N = 8,159 | N = 8,265 | N = 12,412 | |||
| N | % | % | % | % | % | % | % | |
| Outcome | ||||||||
| Depression, 8 weeks | 11,695 | 10.1 | 9.6 | – | – | – | – | 10.4 |
| Never breastfed | 9,155 | 26.8 | – | 25.8 | – | – | – | 26.7 |
| Feelings of poor attachment | 9,340 | 7.0 | – | – | 6.9 | – | – | 7.2 |
| Feelings of hostility, 47 m | 9,226 | 14.6 | – | – | – | 14.4 | – | 14.9 |
| NEET, 61 m | 9,375 | 6.9 | – | – | – | – | 6.7 | 7.3 |
| Predictor | ||||||||
| Age < 20 years | 14,531 | 6.6 | 4.0 | 3.8 | 3.1 | 3.0 | 3.2 | 5.5 |
| No partner or not cohabitating | 13,485 | 8.8 | 6.6 | 6.3 | 6.0 | 5.8 | 5.6 | 8.3 |
| Financial difficulties | 12,011 | 10.0 | 9.2 | 9.4 | 8.4 | 8.3 | 8.6 | 9.3 |
| Depression | 12,177 | 13.9 | 12.3 | 12.3 | 11.6 | 11.5 | 11.6 | 13.0 |
| Smoking in first 3 months | 13,189 | 25.1 | 21.8 | 22.2 | 20.5 | 20.3 | 20.4 | 24.0 |
| Education less than O level | 12,340 | 30.1 | 27.1 | 28.7 | 24.6 | 24.1 | 24.4 | 29.2 |
| At least 1 of the six predictors | 10,955 | 51.2 | 49.3 | 50.6 | 46.3 | 46.0 | 46.3 | 57.1 |
| At least 2 of the six predictors | 10,955 | 22.8 | 21.1 | 21.6 | 18.9 | 18.5 | 19.0 | 24.7 |
NEET not in employment, education or training, and not had a baby since study child. * Response sample is the number who responded to specific questionnaire/assessment for each outcome or predictor. † Analysis sample includes respondents with complete data on the relevant outcome and all six predictors. ‡ Imputed sample includes data imputed on outcomes or predictors for participants who provided data on at least one of the five maternal outcomes