ArticlePloS one2025
Age at menarche and its association with preschool BMI among girls in Northern Norway.
Article in PloS one, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- Urban-rural disparities in menarcheal timing: a longitudinal cohort study examining social determinants of health (SDOH), screen time, and hormonal influences among adolescent girls in West Bengal, India.BMC public health · 2026Article
- Is it time to offer routine screening for iron deficiency in healthy adolescent females?British journal of haematology · 2025Review
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6 authors.
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Abstract
backgroundA decreasing age of menarche has been reported across the Western world. Early menarche is associated with unfavorable health outcomes.
aimThe aims of this study were to describe the age at menarche in a general population sample in Norway and the associations between body mass index (BMI) categories at preschool (approximately 6 years of age) and age at menarche.
methodsWe used self-reported age at menarche among girls who participated in the population-based study Fit Futures 1 (FF 2010-2011), mostly born in 1994, to calculate age at menarche. The preschool BMI from health records was divided into BMI categories according to validated cutoffs on the basis of age and sex from the International Obesity Task Force (IOTF). We estimated the effect of preschool BMI on age at menarche via a linear regression model adjusted for socioeconomic status (SES).
resultsAmong 500 girls with a mean age of 16.5 years (standard deviation (SD) ± 1.4), 497 (99%) had completed menarche. The mean age at menarche was 13.0 years (SD ± 1.2). According to the fitted linear regression model, preschool obesity was a statistically significant predictor of age at menarche and was associated with menarche 9.5 months earlier than a normal preschool BMI was. R2 estimated that preschool BMI could explain 3% of the variance in age at menarche.
conclusionThe mean age at menarche in Northern Norway was 13.0 (SD ± 1.2) years, similar to previous Norwegian studies. Childhood obesity was associated with earlier age at menarche.
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