Comparative study of correlates of early age at menarche among Mexican and Egyptian adolescents

Article Abstract:

An estimated of 4,143 Mexican and Egyptian adolescents girls were studied to determine whether early age at menarche varied across body mass index (BMI), socioeconomic level, and urban rural residence. It was found that menarche at an earlier age was most strongly associated with overweight and obesity in both Mexican and Egyptian adolescents, while urban residence and high socioeconomic level were associated with Mexican adolescents only.

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Impact of seasonal scarcity on energy balance and body composition in peasant adolescents from Calakmul, Campeche Mexico

Article Abstract:

Two different strategies called household subsistence agricultural strategy (HSA) and household commercial agricultural strategy (HCA) was used on male and female adolescents from 16 peasant households to check if they could maintain energy balance during the annual scarcity season. The HSA females lost more muscle mass than the HSA males during the scarcity season, which shows more demanding work schedule throughout the year for females.

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Longitudinal models of long bone growth during adolescence

Article Abstract:

Multilevel modeling procedures were used to model longitudinal adolescent growth of the humerus, radius, femur, and tibia in boys and girls. Growth velocity variation is much higher among the girls and the tibia is the most variable of the four long bones.

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