Table 2

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 periodTotal no of measurements% From either health visitor records or ALSPAC clinic measurements*Median (IQR) no of measurements per child
Overall10016473.2%7 (5 to 10)
Birth length95569556100%N/A
Growth period 196361133880.3%1 (1 to 1)
Growth period 2§99421766964.0%2 (1 to 3)
Growth period 396151731972.5%1 (1 to 3)
Growth period 4**113594428269.6%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.