| At birth | |
| Weight g | 3272.9±459.6 |
| <3000 | 16009 (20.5) |
| 3000–3499 | 35759 (45.9) |
| ≥3500 | 26243 (33.6) |
| Gestational age weeks | 39.7±1.2 |
| <37 | 1822 (2.3) |
| 37–42 | 74007 (94.9) |
| ≥42 | 2182 (2.8) |
| LBW | 2897 (3.7) |
| Pre-term# | 1822 (2.3) |
| SGA | 8200 (10.5) |
| Current assessment | |
| Age yrs | |
| 13 | 20849 (26.7) |
| 14 | 26545 (34.0) |
| 15 | 25500 (32.7) |
| 16 | 5117 (6.6) |
| Height cm | 159.9±7.7 |
| Weight g | 52.8±11.3 |
| BMI | 20.6±3.5 |
| Parental education level yrs | |
| <7 | 18544 (23.8) |
| 7–9 | 19952 (25.6) |
| 10–12 | 26017 (33.4) |
| ≥13 | 13498 (17.3) |
| Number of smokers at home | |
| 0 | 34802 (44.6) |
| 1 | 25403 (32.6) |
| ≥2 | 17806 (22.8) |
| Incense burning | |
| Yes | 41427 (53.1) |
| Active smoking | |
| Yes | 1718 (2.2) |
| Alcohol use | |
| Yes | 1016 (1.3) |
| History of rhinitis | |
| Yes | 17185 (22.3) |
| History of eczema | |
| Yes | 5892 (7.6) |
Data are presented as mean±sd or n (%). LBW: low birthweight (denotes birthweight <2,500 g); SGA: small for gestational age; BMI: body mass index. #: pre-term denotes gestational age <37 weeks.