Phenotype | Birth length (crown-heel) was measured by ALSPAC staff who visited newborns soon after birth (median 1 day, range 1-14 days), using a Harpenden Neonatometer (Holtain Ltd). Birth weight was extracted from medical records. From birth to five years, length and weight mea- surements were extracted from health visitor records, which form part of standard childcare in the UK. In this cohort we had up to four measurements taken on average at six weeks and at 10, 21, and 48 months of age. For a random 10% of the cohort, we also have length/height mea- surements from eight research clinic visits, held between the ages of four months and five years of age. From age seven years upwards, all children were invited to annual clinics. In addi- tion, parent-reported child height and weight were also available from the questionnaires. BMI was derived from height and weight measurements (mean 9 measurements per individual) and calculated as the weight (in kg) divided by the square of height (in cm). |
Sample Ancestry | European |
Total number | 2,690 individuals |
Detailed numbers |
100.0% Male samples
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Participant Follow-up Time | Mean : 20.0 years |
Number of Cohort(s) | 1 |
Cohort Short Name
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Cohort Full Name
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Previous/other/additional names (e.g. sub-cohorts)
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ALSPAC | Avon Longitudinal Study of Parents and Children | — |