Timing of menarche in Norwegian girls: associations with body mass index, waist circumference and skinfold thickness
نویسندگان
چکیده
BACKGROUND Research studies show conflicting results regarding the association between menarche and body weight. The purpose of the present study was to investigate if anthropometric indicators of body composition, body mass index (BMI), waist circumference (WC), triceps (TSF) and subscapular skinfold (SSF) thicknesses, were differentially associated with age at menarche in Norwegian girls. METHODS The association between menarche and BMI, WC, TSF and SSF was investigated in 1481 girls aged 8-15.5 years, and in a subgroup of 181 girls with menarche during the 12 months prior to examination. Anthropometric measures were categorized as low (< -1SDS), average (-1 ≤ SDS ≤ +1) or high (> 1SDS), and menarche according to this classification was analysed with Kaplan-Meier curves and unadjusted and adjusted Cox regression. RESULTS The median age at menarche in the total sample was 13.1 years. In the unadjusted models, low categories of all traits were associated with later menarche, and high categories with earlier menarche. When adjusted for other covariates, earlier menarche was only related with a high BMI (Hazard Ratio 1.41, 95% confidence interval (CI) 1.07, 1.85), and later menarche with a low BMI (HR 0.53, 95%CI 0.38, 0.75) and low SSF (HR 0.54, 95%CI 0.39, 0.75). In girls with recent menarche, early menarche was significantly associated with a high BMI in the final model (HR 1.79, 95%CI 1.23, 2.62). CONCLUSIONS The timing of menarche was associated with the BMI, WC, TSF and SSF, but more strongly so with the BMI. These associations may be related to a common tempo of growth, as the mean age at menarche has remained stable during the last decades during a time period while the prevalence of overweight and obesity has increased significantly.
منابع مشابه
ASSESSMENT OF THE RELATION BETWEEN AGE AT MENARCHE, ANTHROP OMETRIC PARAMETERS AND INTELLIGENCE QUOTIENT IN MASHHAD, IRAN
The present study was initiated to derive an indirect method for estimating body fat mass (BFM) and to evaluate the correlation between indirect anthropometric techniques for this estimation and to examine the relation of these parameters and of IQ to age of menarche. A total of 578 adolescent girls of ten junior high schools in five educational districts of Mashhad, participated in a cros...
متن کاملASSESSMENT OF THE RELATION BETWEEN AGE AT MENARCHE, ANTHROP OMETRIC PARAMETERS AND INTELLIGENCE QUOTIENT IN MASHHAD, IRAN
The present study was initiated to derive an indirect method for estimating body fat mass (BFM) and to evaluate the correlation between indirect anthropometric techniques for this estimation and to examine the relation of these parameters and of IQ to age of menarche. A total of 578 adolescent girls of ten junior high schools in five educational districts of Mashhad, participated in a cros...
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