Summary of measurements included in the growth model for 12 366 individuals included in models
| No of children with at least one measurement per growth period | Total no of measurements | % From either health visitor records or ALSPAC clinic measurements* | Median (IQR) no of measurements per child | |
| Overall | 100164 | 73.2% | 7 (5 to 10) | |
| Birth length | 9556 | 9556 | 100%† | N/A |
| Growth period 1‡ | 9636 | 11338 | 80.3% | 1 (1 to 1) |
| Growth period 2§ | 9942 | 17669 | 64.0% | 2 (1 to 3) |
| Growth period 3¶ | 9615 | 17319 | 72.5% | 1 (1 to 3) |
| Growth period 4** | 11359 | 44282 | 69.6% | 4 (3 to 5) |
↵* That is excluding parent-reported measurements from questionnaires.
↵† All birth length measurements either extracted from health records or measured by Avon Longitudinal Study of Parents and Children (ALSPAC) staff.
↵‡ 0–3 Months for boys, 0–2 months for girls.
↵§ 3–10 Months for boys, 2–11 months for girls.
↵¶ 10–29 Months for boys, 11–32 months for girls
↵** 29–120 Months for boys, 32–120 months for girls.
IQR, interquartile range.