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The purpose of this study was to review published studies on the variability of age at menarche and age at menopause throughout the world, and to identify the main causes for age variation in the timing of these events. We first present a summary table including mean (or median) values of the age at menarche in 67 countries, and of the age at menopause in(More)
Available data on the long-term consequences of preschool stunting are scarce and conflicting. The objective of this study was to assess the amount of catch-up growth from preschool stunting and the effect of migration (change in environment) during adolescence. A cohort study from preschool age (1-5 y) to adulthood (18-23 y) was conducted among 2874(More)
OBJECTIVE To study the long-term impact of stunting during infancy on maturation, growth and fat distribution in adolescence. DESIGN A cohort of 406 Senegalese adolescent girls of rural origin underwent clinical and growth assessments every year from 1995 to 1999. SUBJECTS Mean coverage rate was 82% at each round. Adolescent girls were 11.4+/-0.5 y of(More)
Body dimensions, motor performance tests, and an aerobic stress test were measured on three different occasions on a group of 88 healthy Senegalese children, 3-6 years of age. The children were divided into 3 cohorts according to year of birth: 1985, 1984, and 1983. The children displayed linear growth approaching North American reference data but had(More)
OBJECTIVE To study the impact of preschool stunting on adolescent height and age at menarche in rural West Africa. DESIGN A longitudinal, population-based study. SETTING The Niakhar study area in Central Senegal. SUBJECTS 1650 children aged 12-17 y with known height-for-age at the age of 2-5 y. MAIN OUTCOME MEASURES Adolescent height; mean age at(More)
This study aimed to assess the timing of sexual maturation (breast development and menarche occurrence) among sub-Saharan African adolescent girls from rural areas. In the framework of a longitudinal study of growth at puberty, the stages of pubertal development (Tanner classification) and menarche occurrence were recorded at intervals between 1995 and 2000(More)
The objective of this paper was to document mercury contamination of Amerindian populations living along the Beni River in Bolivia and to examine risk factors related to their lifestyle. A cross-sectional survey was performed among 15 communities on the flood plains of the Beni River at the foothills of the Andes. Hair mercury content (H-Hg) served as a(More)
Severe polymetallic contamination is frequently observed in the mining communities of Bolivian Altiplano. We evaluated hair trace elements concentrations at the population level to characterise exposure profile in different contexts of contact with mining and metallurgical pollution. We sampled 242 children aged 7 to 12 years in schools from five Oruro(More)
OBJECTIVE The aim of this study was to measure habitual physical activity in a group of Sereer adolescent females from Senegal. The hypothesis tested was that physical activity levels of adolescent Senegalese girls differ according to location and living conditions and may have a negative impact on growth and nutritional status. DESIGN Studies of physical(More)
Relationships between anthropometric dimensions (stature, weight, arm and calf circumferences, and four subcutaneous skinfolds), and motor performances (dash, standing long jump, throw for distance and grip strength) were considered in 348 mild-to-moderately undernourished Senegalese children 5-13 years of age (168 boys and 180 girls). Weights and statures(More)