Table 1. Demographics and the delivery details for all mothers.
| Characteristic | Normal (n = 8) | Smoker (n = 10) | ||||
| Mean | SD | Range | Mean | SD | Range | |
| Maternal age (years) | 29.5 | 4.9 | 20–33 | 24.7 | 4.2 | 18–29 |
| Weight (kg) | 71.1 | 11.2 | 59–92 | 65.9 | 13.8 | 55–88 |
| Height (cm) | 167.5 | 6.5 | 162–176 | 166.4 | 4.1 | 160–175 |
| BMI | 24.5 | 3.7 | 20–30 | 23.4 | 5.5 | 18–33 |
| Parity | 0.5 | 0.8 | 0–2 | 1.2 | 1.2 | 0–3 |
| Cigarette smoked per day | N/A | N/A | N/A | 9 | 4 | 4–15 |
| Gestational age at delivery (weeks+days) * | 39.9 | 1.4 | 37.3–41.9 | 39.8 | 1.4 | 37.7–41.6 |
| Birth weight (g) * | 3547 | 597 | 2880–4220 | 3036 | 582 | 2170–4140 |
| Education | 1 with 0 GCSEs, 1 with <5 GCSEs, 4 with >5 GCSEs, 1 with A-Levels and 1 with a degree | 2 with 0 GCSEs, 5 with <5 GCSEs and 3 with >5 GCSEs | ||||
| Delivery | 2 Emergency Caesarean, 1 elective Caesarean deliveries | 2 Ventouse deliveries | ||||
*
Note that the estimated means and standard deviations for gestation at delivery and birth weight were corrected for fetal sex, maternal education (education was re-coded as an ordinal variable: 0 = 0 GCSEs; 1 = <5 GCSEs; 2 = >5 GCSEs/A-levels/degree), and maternal age as derived from the ANCOVA (IBM SPSS Statistics Version 20, NY, USA).