|Title||Early puberty in 11-year-old girls: Millennium Cohort Study findings.|
|Publication Type||Journal Article|
|Year of Publication||2017|
|Authors||Kelly, Y, Zilanawala, A, Sacker, A, Hiatt, R, Viner, R|
|Journal||Arch Dis Child|
|Keywords||Adiposity, Asia, Western, Child, Female, Humans, Income, Longitudinal Studies, Menarche, Menstruation, Prospective Studies, Puberty, Precocious, Socioeconomic Factors, Stress, Psychological, United Kingdom, West Indies|
OBJECTIVE: Early puberty in girls is linked to some adverse outcomes in adolescence and mid-life. We address two research questions: (1) Are socioeconomic circumstances and ethnicity associated with early onset puberty? (2) Are adiposity and/or psychosocial stress associated with observed associations?
DESIGN: Longitudinal data on 5839 girls from the UK Millennium Cohort Study were used to estimate associations between ethnicity, family income, adiposity and psychosocial stress with a marker of puberty.
MAIN OUTCOME MEASURE: Reported menstruation at age 11 years.
RESULTS: All quoted ORs are statistically significant. Girls in the poorest income quintile were twice as likely (OR=2.1), and the second poorest quintile nearly twice as likely (OR=1.9) to have begun menstruation compared with girls in the richest income quintile. Estimates were roughly halved on adjustment for Body Mass Index and markers of psychosocial stress (poorest, OR=1.5; second poorest, OR=1.5). Indian girls were over 3 times as likely compared with whites to have started menstruation (OR=3.5) and statistical adjustments did not attenuate estimates. The raised odds of menstruation for Pakistani (OR=1.9), Bangladeshi (OR=3.3) and black African (OR=3.0) girls were attenuated to varying extents, from about a third to a half, on adjustment for income and adiposity.
CONCLUSIONS: In contemporary UK, excess adiposity and psychosocial stress were associated with social inequalities in early puberty, while material disadvantage and adiposity were linked to ethnic inequalities in early puberty among girls.
|Alternate Journal||Arch. Dis. Child.|
|PubMed Central ID||PMC5339561|