Journal of Population Sciences
From: Inequalities at birth: stable socioeconomic differences in birth outcomes in three British cohorts
Cohort: | NCDS (1958) | B70 (1970) | MCS (2001) | |||
---|---|---|---|---|---|---|
 | Mean/% | SE | Mean/% | SE | Mean/% | SE |
Outcome variables | Â | Â | Â | Â | Â | Â |
 Birth Weight (g) | 3300.91 | 4.59 | 3299.78 | 4.51 | 3404.51 | 6.16 |
 LBW | 7.23 |  | 6.64 |  | 5.46 |  |
Independent variables | Â | Â | Â | Â | Â | Â |
Maternal education | Â | Â | Â | Â | Â | Â |
 High | 24.99 |  | 33.19 |  | 33.64 |  |
 Low | 75.01 |  | 66.81 |  | 66.36 |  |
 Smoking in pregnancy (SIP) | 34.06 |  | 43.10 |  | 23.15 |  |
Controls | Â | Â | Â | Â | Â | Â |
 Child is female | 48.61 |  | 48.10 |  | 48.50 |  |
 Maternal height (cm) | 161.01 | 0.051 | 161.02 | 0.051 | 164.34 | 0.082 |
Maternal age | Â | Â | Â | Â | Â | Â |
  < 19 | 5.61 |  | 9.88 |  | 4.97 |  |
 20–29 | 61.01 |  | 66.87 |  | 40.49 |  |
 30–39 | 30.86 |  | 21.29 |  | 51.13 |  |
 40 +  | 2.52 |  | 1.97 |  | 3.41 |  |
Marital status | Â | Â | Â | Â | Â | Â |
 Married | 96.43 |  | 93.13 |  | 54.96 |  |
 Non-Married | 3.57 |  | 6.87 |  | 45.04 |  |
Birth order | Â | Â | Â | Â | Â | Â |
 First born | 36.51 |  | 37.67 |  | 42.66 |  |
 Second born | 31.26 |  | 32.71 |  | 36.85 |  |
 Third + born | 32.23 |  | 29.62 |  | 20.48 |  |
Timing of prenatal care access | Â | Â | Â | Â | Â | Â |
 Before 12th week | 20.93 |  | 31.39 |  | 43.8 |  |
 12th to 23rd week | 62.50 |  | 43.05 |  | 52.36 |  |
 After 23rd week | 16.04 |  | 24.94 |  | 1.41 |  |
 No visits | 0.53 |  | 0.63 |  | 2.43 |  |
 N | 15,500 |  | 15,552 |  | 14,619 |  |