Odds ratio (95% confidence interval) for change in prevalence of adverse circumstances in Natsal 2000 compared with Natsal 1990 in women aged 18 to 27 years by motherhood before the age of 18
| Birth before age 18 years | Test for interaction | ||
|---|---|---|---|
| No | Yes | p Value | |
| Test for interaction: a statistical test to examine whether the change between 1990 and 2000 was statistically significantly different for women who had a child before 18 compared with those who did not. | |||
| Education and participation | |||
| No academic qualification | 0.67 (0.53, 0.85) | 1.14 (0.66, 1.96) | 0.080 |
| Not in education/work/training | 0.68 (0.57, 0.80) | 1.16 (0.62, 2.18) | 0.100 |
| Material circumstances | |||
| Living in social housing | 1.00 (0.84, 1.18) | 1.23 (0.68, 2.23) | 0.500 |
| In social class IV/V/unemployed | 1.15 (0.96, 1.39) | 0.68 (0.30, 1.51) | 0.207 |
| Family relationships and parity | |||
| Currently living as lone adult | 1.19 (0.99, 1.43) | 1.06 (0.63, 1.81) | 0.702 |
| Have three or more children | 0.62 (0.40, 0.97) | 0.94 (0.52, 1.70) | 0.276 |
| Health related factors | |||
| Current smoker | 1.03 (0.89, 1.20) | 0.76 (0.44, 1.31) | 0.277 |
| BMI ⩾25 kg/m2 | 1.37 (1.15, 1.63) | 1.37 (0.73, 2.55) | 0.998 |
| Ill for three months or more in past five years | 1.33 (1.07, 1.65) | 1.61 (0.63, 4.12) | 0.699 |