Table 1.
Cohort characteristics ( N indicates the total sample with available data)
| Continuous variables | N | Mean (SD) | Categorical variables | N | % (with outcome specified) |
|---|---|---|---|---|---|
| Parental | Ethnicity | 1619 | |||
| Maternal age (years) | 1338 | 33.5 (4.3) | White Caucasian | 95.3 | |
| Paternal age (years) | 1291 | 35.7 (5.4) | Black | 1.3 | |
| Maternal height (cm) | 1237 | 165.9 (7.2) | Asian | 1.7 | |
| Maternal pre-pregnancy weight (kg) | 1203 | 66.3 (12.4) | Other | 1.7 | |
| Maternal pre-pregnancy BMI (kg/m 2 ) | 1173 | 24.1 (4.6) | |||
| Maternal pregnancy weight gain (kg) | 866 | 8.2 (6.7) | Maternal education | 780 | |
| Index of multiple deprivation | 920 | 8.9 (4.2) | University degree-level | 62.7 | |
| Other | 37.3 | ||||
| Smoking during pregnancy | 1575 | 5.5 | |||
| Maternal weight | 1173 | ||||
| Overweight (BMI > 25) | 30.6 | ||||
| Obese (BMI > 30) | 9.9 | ||||
| Primiparous pregnancy | 1629 | 43.4 | |||
| Recorded diabetic pregnancy | 1562 | 7 | |||
| Birth | |||||
| Gestational age | 1638 | 39.8 (1.6) | |||
| Birthweight (kg) | 1657 | 3.47 (0.55) | Small for gestational age | 1657 | 1.1 |
| Newborn length (cm) | 1599 | 51.4 (2.6) | Large for gestational age | 1657 | 2.7 |
| Newborn head circumference (cm) | 1602 | 35.3 (1.7) | |||
| Newborn mean skinfold thickness (mm) | 1599 | 6.3 (1.6) | Delivery (caesarian delivery) | 1630 | 30.2 |
| Infant sex (male) | 1660 | 51.7 | |||
| Infancy | |||||
| 3-month weight (kg) | 1340 | 6.15 (0.83) | Rapid infancy weight gain 0–12 months | 1179 | |
| 3-month length (cm) | 1335 | 61.1 (2.6) | Catch-up weight gain | 26 | |
| 3-month head circumference (cm) | 1342 | 40.7 (1.4) | Normal weight gain | 46.7 | |
| 3-month mean skinfold thickness (mm) | 1342 | 10.8 (2.0) | Catch-down weight gain | 27.3 | |
| 12-month weight (kg) | 1182 | 9.97 (1.19) | |||
| 12-month length (cm) | 1175 | 75.9 (2.9) | |||
| 12-month head circumference (cm) | 1179 | 46.4 (1.4) | |||
| 12-month mean skinfold thickness (mm) | 1178 | 11.3 (2.1) | |||
| 18-month weight (kg) | 1094 | 11.36 (1.32) | |||
| 18-month length (cm) | 1096 | 82.2 (3.2) | |||
| 18-month head circumference (cm) | 1088 | 47.8 (1.5) | |||
| 18-month mean skinfold thickness (mm) | 1096 | 10.8 (2.1) | |||
| 24-month weight (kg) | 1051 | 12.61 (1.47) | |||
| 24-month length (cm) | 1043 | 87.8 (3.4) | |||
| 24-month head circumference (cm) | 1051 | 48.7 (1.5) | |||
| 24-month mean skinfold thickness (mm) | 1057 | 10.3 (2.2) | |||
| Infancy nutrition | |||||
| Age stopped breastfeeding (months) | 436 | 5.3 (3.1) | 3-month feeding | 1319 | |
| Age started solids (months) | 652 | 5.0 (0.9) | Exclusively breastfed | 42.2 | |
| Mixed-fed | 24.9 | ||||
| Exclusively formula-fed | 29 | ||||
| S'tarted solids | 3.9 |