Odds ratio (95% confidence interval) for adverse outcomes according to whether or not women had a child before the age of 18 years compared with women who were not sexually active before the age of 18 years, by year of survey
| Natsal 1990 | Natsal 2000 | |||||
|---|---|---|---|---|---|---|
| Sexual intercourse before 18 years | Sexual intercourse before 18 years | |||||
| Yes | Yes | |||||
| Birth before 18 years | Birth before 18 years | |||||
| Circumstances at time of survey | No | No | Yes | No | No | Yes |
| Education and participation | ||||||
| No academic qualification | 1.00 | 1.63 (1.22, 2.20) | 8.86 (5.79, 13.6) | 1.00 | 2.03 (1.30, 3.20) | 19.0 (10.5, 34.3) |
| Not in education/work/training | 1.00 | 1.62 (1.34, 1.95) | 8.37 (5.38, 13.0) | 1.00 | 1.92 (1.42, 2.62) | 17.5 (10.1, 30.3) |
| Material circumstances | ||||||
| Living in social housing | 1.00 | 1.63 (1.32, 2.00) | 8.27 (5.48, 12.49) | 1.00 | 1.50 (1.14, 1.99) | 10.2 (6.10, 17.2) |
| Social class IV/V/unemployed | 1.00 | 1.44 (1.10, 1.88) | 9.86 (5.08, 19.1) | 1.00 | 1.14 (0.84, 1.55) | 5.15 (2.93, 9.05) |
| Family relationships and parity | ||||||
| Currently living as lone adult | 1.00 | 1.47 (1.12, 1.94) | 5.17 (3.38, 7.91) | 1.00 | 1.79 (1.34, 2.40) | 5.64 (3.52, 9.04) |
| 3+ children | 1.00 | 1.73 (1.07, 2.80) | 19.6 (11.4, 33.8) | 1.00 | 7.22 (1.45, 36.0) | 111 (21.8, 563) |
| Health related factors | ||||||
| Current smoker | 1.00 | 2.88 (2.36, 3.50) | 5.86 (3.96, 8.69) | 1.00 | 3.70 (2.79, 4.89) | 5.93 (3.66, 9.63) |
| BMI ⩾25 kg/m2 | 1.00 | 1.20 (0.95, 1.52) | 1.36 (0.89, 2.08) | 1.00 | 1.25 (0.92, 1.69) | 1.44 (0.82, 2.50) |
| Ill for three months or more in past five years | 1.00 | 1.57 (1.14, 2.17) | 1.41 (0.64, 3.10) | 1.00 | 1.27 (0.91, 1.76) | 1.53 (0.80, 2.92) |