Maternal characteristics of live singleton births by social class and time, Scotland 1980–2000
| Social class | 1980–1984 | 1985–1989 | 1990–1994 | 1995–2000 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Maternal age | I | 28.6 | 4.5 | 29.2 | 4.6 | 30.6 | 4.1 | 31.6 | 4.1 |
| Mean and SD, years | II | 28.2 | 4.6 | 28.7 | 4.6 | 29.4 | 4.6 | 30.5 | 4.7 |
| IIInm | 25.2 | 5.0 | 25.7 | 5.0 | 26.3 | 5.2 | 27.2 | 5.6 | |
| IIIm | 25.7 | 4.8 | 26.4 | 4.7 | 27.3 | 4.8 | 28.6 | 4.9 | |
| IV | 24.9 | 5.0 | 25.0 | 4.9 | 26.4 | 4.9 | 27.2 | 5.4 | |
| V | 24.2 | 4.9 | 24.6 | 4.7 | 26.1 | 4.8 | 27.6 | 5.1 | |
| Undetermined | 22.5 | 5.8 | 21.9 | 5.2 | 23.8 | 5.5 | 24.4 | 6.1 | |
| Total | 25.9 | 5.1 | 26.2 | 5.1 | 27.1 | 5.2 | 28.1 | 5.6 | |
| Maternal height | I | 162.2 | 6.2 | 162.6 | 6.2 | 163.4 | 6.3 | 164.0 | 6.3 |
| Mean and SD, cm | II | 161.5 | 6.2 | 162.0 | 6.2 | 162.7 | 6.3 | 163.4 | 6.4 |
| IIInm | 160.5 | 6.3 | 161.3 | 6.3 | 161.9 | 6.4 | 162.8 | 6.5 | |
| IIIm | 159.9 | 6.2 | 160.7 | 6.2 | 161.7 | 6.3 | 162.4 | 6.4 | |
| IV | 159.7 | 6.2 | 160.4 | 6.3 | 161.4 | 6.4 | 162.2 | 6.5 | |
| V | 159.0 | 6.2 | 159.8 | 6.3 | 161.2 | 6.5 | 162.1 | 6.6 | |
| Undetermined | 159.3 | 6.2 | 159.8 | 6.2 | 161.0 | 6.5 | 161.9 | 6.5 | |
| Total | 160.3 | 6.3 | 161.0 | 6.3 | 161.8 | 6.4 | 162.7 | 6.5 | |
| Single mothers, % | I | 2.9 | 3.4 | 1.7 | 4.0 | ||||
| II | 3.2 | 5.9 | 9.2 | 13.4 | |||||
| IIInm | 14.5 | 24.8 | 31.4 | 38.1 | |||||
| IIIm | 2.8 | 5.7 | 12.6 | 13.1 | |||||
| IV | 16.6 | 24.4 | 22.4 | 31.3 | |||||
| V | 7.4 | 8.1 | 20.6 | 20.5 | |||||
| Undetermined | 43.5 | 63.8 | 60.4 | 59.3 | |||||
| Total | 8.6 | 15.6 | 21.3 | 26.3 | |||||
| Parity 3+, % | I | 4.9 | 5.2 | 4.9 | 4.9 | ||||
| II | 6.4 | 6.2 | 5.2 | 4.8 | |||||
| IIInm | 5.6 | 4.7 | 5.0 | 4.2 | |||||
| IIIm | 7.2 | 7.0 | 6.0 | 6.5 | |||||
| IV | 7.7 | 7.7 | 6.8 | 6.8 | |||||
| V | 10.3 | 11.7 | 9.1 | 10.7 | |||||
| Undetermined | 8.1 | 7.8 | 8.7 | 10.1 | |||||
| Total | 7.1 | 6.9 | 6.3 | 6.5 | |||||