Socioeconomic status and age at menarche in indigenous and non-indigenous Chilean adolescents

Amigo, Hugo; Vásquez, Sofía; Bustos, Patricia; Ortiz, Guillermo; Lara, Macarena

doi:10.1590/s0102-311x2012000500016

Cited by 27 publications

(16 citation statements)

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“…This is consistent with recent findings that showed an inverse association between age at menarche and BMI among school girls, which was evident across all socio-economic groups [39,57,58]. Our findings are also consistent with that reported from the United States [24,59], Croatia [60], and Chile [61] where early sexual maturation was associated with obesity among school girls. There are several explanations for the association between age at menarche and obesity, but the specific mechanisms remain unclear.…”

Section: Discussionsupporting

confidence: 93%

Age at menarche and its relationship to body mass index among adolescent girls in Kuwait

et al. 2013

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BackgroundDespite the increasing rates of childhood obesity and rapid change in socio-economic status, the mean age at menarche remains mostly unknown among contemporary girls in Kuwait and other countries in the Gulf region. This study aimed to estimate the mean age at menarche among schoolgirls in Kuwait and investigate the association between age at menarche and obesity.MethodsA cross-sectional study was conducted on 1,273 randomly selected female high school students from all governorates in Kuwait. Overweight was defined as higher than or equal to the 85th percentile and obesity as higher than or equal to the 95th percentile using growth charts provided by the Centres for Disease Control and Prevention (CDC, 2000). Data on menarche, socio-demographic status, physical activity and diet were collected using confidential self-administered questionnaire.ResultsOut of 1,273 students, 23 (1.8%) were absent or refused to participate. The mean age at menarche was 12.41 years (95% CI: 12.35-12.48). The prevalence of early menarche, defined as less than 11 years of age, was 8.5% (95% CI: 7.0-10.2%). The prevalence of obesity and overweight was 18.3% (95% CI: 16.2-20.6%) and 25.8% (95% CI: 23.42-28.30%), respectively. Age at menarche was inversely and significantly associated with odds of overweight and obesity after adjusting for potential confounders, odds ratio 0.84 (0.77-0.93); (p = 0.001).ConclusionAge at menarche among contemporary girls in Kuwait is similar to that in industrialized countries. There is an inverse association between age at menarche and obesity or overweight. Trends in menarcheal age should be monitored and time of sexual maturation and its related factors should be taken into account in strategies that aim to combat obesity.

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Section: Discussionsupporting

confidence: 93%

Age at menarche and its relationship to body mass index among adolescent girls in Kuwait

et al. 2013

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“…Finally, girls who were excluded from our analyses because they were missing prospective diet assessments were slightly younger at Tanner stage 4 and at menarche than were included girls, and this difference could have potentially introduced bias. Despite these exclusions, the mean dairy intake, age at Tanner stage 4, and age at menarche in our cohort were comparable with other contemporary Chilean cohorts, thereby suggesting that the girls who were included in our analysis were still representative of public-school children of low-middle socioeconomic status in Santiago (61)(62)(63).…”

Section: Discussionsupporting

confidence: 67%

Dairy intake in relation to breast and pubertal development in Chilean girls,

Gaskins

Pereira

Quintiliano

et al. 2017

The American Journal of Clinical Nutrition

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Background: Frequent dairy consumption in childhood has been related to higher growth-hormone concentrations that may affect mammary gland and pubertal development. Objective: We evaluated the relation of dairy intake to breast composition at Tanner stage 4 and age at menarche. Design: A total of 515 Chilean girls are included in the Growth and Obesity Cohort Study. The subjects have been followed longitudinally since they were 3-4 y old (from 2006 to the present). Starting in 2013, diet was assessed every 6 mo via a 24-h recall. The breast fibroglandular volume (FGV) was measured with the use of dual-energy X-ray absorptiometry at Tanner stage 4. The date of menarche was reported every 6 mo. Our analysis included 290 girls with data on prospective diet and breast composition and 324 girls with data on prospective diet and age at menarche. Results: The mean 6 SD breast FGV and percentage of fibroglandular volume (%FGV) (i.e., FGV divided by total breast volume times 100) at Tanner stage 4 was 81.7 6 32.2 cm 3 and 42.0% 6 16.7%, respectively. Only sweetened, artificially flavored milk-based drinks were associated with the %FGV with girls who consumed .125 g/d having a %FGV that was 4.5% (95% CI: 0.9%, 8.1%) higher than that of girls who consumed none (P-trend = 0.007). Yogurt intake was associated with a lower FGV. Specifically, girls who consumed .125 g yogurt/d had 210.2 cm 3 (95% CI: 220.2, 20.3 cm 3 ) less FGV than did girls who consumed no yogurt (P-trend = 0.03). The majority (90.7%) of girls in our cohort attained menarche before the data analyses with a mean 6 SD age at menarche of 11.9 6 0.7 y. In multivariable models, low-fat dairy, low-fat milk, and yogurt intakes were associated with a later age at menarche. In particular, girls who consumed .125 g yogurt/d had menarche, on average, 4.6 mo (95% CI: 1.9, 7.4 mo) later than girls who consumed no yogurt (P-trend = 0.01). Conclusion: More-frequent consumption of sweetened, artificiallyflavored milk-based drinks is associated with a higher %FGV, whereas higher yogurt intake is associated with a lower FGV and delayed age at menarche in Chilean girls.Am J Clin Nutr 2017;105:1166-75.

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“…To our knowledge, this is one of the few cohort health studies to have been conducted in an indigenous population in South America. Others include a growth study of indigenous and nonindigenous girls in Chile's Araucanía Region (Amigo, Lara, Bustos, & Muñoz, ; Amigo, Vásquez, Bustos, Ortiz, & Lara, ) and a 9‐year panel study carried out among the Tsimane' indigenous people in Bolivia to access the impact of modernization and market exposure on overall health, nutrition, and perception of wellbeing (Gurven et al, ; Leonard et al, ). In Brazil, an ongoing prospective birth cohort study addresses social determinants of child respiratory health among the Guarani Mbya (Cardoso et al, ).…”

Section: Introductionmentioning

confidence: 99%

The Xavante Longitudinal Health Study in Brazil: Objectives, design, and key results

Welch

Ferreira

Tavares

et al. 2019

American J Hum Biol

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Objective The Xavante Longitudinal Health Study was developed to permit granular tracking of contemporary health challenges faced by indigenous communities in Brazil, taking into consideration ongoing historical processes that may be associated with increases in child undernutrition, adult obesity, and cardiovascular disease risks. Methods This was an open‐cohort study with six semiannual data collection waves from 2009 to 2012. The study was undertaken in two Xavante villages, Pimentel Barbosa and Etênhiritipá, State of Mato Grosso, Central Brazil. No sampling technique was used. Data collection placed emphasis on growth and nutrition of children under five and nutrition status, blood pressure, and blood glucose levels of adolescents and adults. Results Baseline data collection began in July/August 2009 with a population census (656 individuals). Between the first and final waves, the study population increased by 17%. At baseline, stunting and wasting was elevated for most age groups <10 years. Overweight, obesity, and increased risk of metabolic complications were expressive among individuals >17 years, disproportionately affecting females. Anemia was elevated in most age groups, especially among females. Mean systolic and diastolic blood pressure was moderate. The overall prevalence of high blood pressure was relatively low. Conclusions Our findings reveal marked health disparities relative to the Brazilian national population and a complex dietary health epidemiology involving the double burden of malnutrition, rapidly changing nutritional indicators, and elevated metabolic disease risk. The topically broad multidisciplinary focus permitted construction of the richest longitudinal data set of socio‐epidemiological information for an indigenous population in Brazil.

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Socioeconomic status and age at menarche in indigenous and non-indigenous Chilean adolescents

Abstract: Abstract

Cited by 27 publications

References 16 publications

Age at menarche and its relationship to body mass index among adolescent girls in Kuwait

Age at menarche and its relationship to body mass index among adolescent girls in Kuwait

Dairy intake in relation to breast and pubertal development in Chilean girls,

The Xavante Longitudinal Health Study in Brazil: Objectives, design, and key results

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