Group characteristics of members of each cohort in the English and Welsh analysis
| Characteristics | Cohort | Non-bereaved mothers | Bereaved mothers |
|---|---|---|---|
| N | 1971–81 | 36 062 | 1120 |
| N | 1981–91 | 36 434 | 745 |
| N | 1991–01 | 30 956 | 481 |
| Mean age at start of census period in years (SD) | 1971–81 | 22.0 (5.7) | 21.9 (9.0) |
| Mean age at start of census period in years (SD) | 1981–91 | 22.4 (5.7) | 22.5 (8.4) |
| Mean age at start of census period in years (SD) | 1991–01 | 24.1 (5.2) | 23.8 (8.3) |