Table 1 Characteristics of mothers giving birth in the pre- and post-AFFIRM study periods (based on available data)
Mean (SD) or n(%) | ||
|---|---|---|
Control (pre-AFFIRM) n = 157,692 | Intervention (post-AFFIRM) n = 227,860 | |
Maternal age (years) | 30.0 (5.8) | 30.2 (5.7) |
Ethnicity | ||
White Asian Black (African or Caribbean) Mixed Other Missing/not reported | 118,127 (74.9%) 10,966 (7.0%) 4288 (2.7%) 2845 (1.8%) 2272 (1.4%) 19,194 (12.2%) | 169,531 (74.5%) 15,144 (6.6%) 6172 (2.7%) 3221 (1.4%) 4126 (1.8%) 29,666 (13.0%) |
BMI – overweight or obese (≥ 25 kg/m2) | 61,950 (48.2%) | 95,413 (49.9%) |
Parity – nulliparous | 65,145 (42.4%) | 89,822 (40.8%) |
Estimated gestation at birth (weeks) | 39.1 (2.2) | 39.0 (2.2) |
Multiple births this pregnancy – yes | 2575 (1.6%) | 3794 (1.7%) |