Age at menarche of European, Afro-Caribbean and Indo-Pakistani schoolgirls living in London

SummaryAge at menarche is reported for 1,365 European, 530 Afro-Caribbean and 282 Indo-Pakistani schoolgirls taking part in a cross-sectional anthropometric survey in the London Area Health Authorities of Kensington, Chelsea and Westminster, and Brent and Harrow, in 1980–81. Mean ages at menarche are 13·59±0·37 years (European), 13·18±0·11 years (Afro-Caribbean) and 13·06±0·20 years (Indo-Pakistani). The European value is significantly higher than those for Afro-Caribbean and Indo-Pakistani girls, and for Europeans living in the same areas of London in 1966. Social class has an effect on age at menarche in Afro-Caribbean and European girls, but not Indo-Pakistani girls, whilst family size has an effect on age at menarche in Europeans and Indo-Pakistanis.