Roberto Ribeiro

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OBJECTIVE To evaluate age of menarche and anthropometric data of schoolgirls of different socioeconomic levels in Cascavel, state of Parana, in Southern Brazil. METHODS A cross-sectional study was carried out in 2006 with 2,761 girls evaluated in 27 private and public schools. Age at menarche was obtained by the status quo method. Sexual maturity was(More)
OBJECTIVE To evaluate the influence of body composition on bone mass in children and adolescents. METHODS A cross-sectional study with 267 healthy students of both sexes (141 males and 126 females) aged 8 to 18 years. Weight, height, body mass index, lean mass, fat mass, fat mass index, body fat percentage, waist and hip circumferences, and waist-to-hip(More)
The purpose of this study was to evaluate bone mass by phalanges ultrasound in healthy white and black schoolchildren in relationship to socioeconomic level, pubertal stage, and body composition. Included were 1,356 healthy schoolchildren aged from 6 to 11 years from different socioeconomic levels and both genders; all were placed into white and black(More)
The aim of the present study was to evaluate quantitative ultrasound parameters of the finger phalanges bones (AD-SoS, amplitude-dependent speed of sound, and BTT, bone transmission time) of schoolchildren, using a DBM Sonic device (IGEA, Carpi, Italy), to obtain normative values for the Brazilian population. The sample consisted of 1,775 healthy(More)
OBJECTIVE To evaluate the association between quantitative ultrasonography at hand phalanges (QUS) and dual energy X-ray absorptiometry (DXA), and between these methods with food intake and history of bone fractures. SUBJECTS AND METHODS After two years of follow up of 270 schoolchildren, 10 of them, who showed bone mass below - 2 SD in QUS, were included(More)
AIMS To establish normative data for phalangeal quantitative ultrasound (QUS) measures in Brazilian students. METHODS The sample was composed of 6870 students (3688 females and 3182 males), aged 6 to 17 years. The bone status parameter, Amplitude Dependent Speed of Sound (AD-SoS) was assessed by QUS of the phalanges using DBM Sonic BP (IGEA, Carpi, Italy)(More)
OBJECTIVE To estimate the prevalence of low cardiorespiratory fitness and its association with excess body fat, considering the sexual maturation and economic level in female adolescents. METHODS Cross-sectional, epidemiological study of 1,223 adolescents (10-17 years) from the public school system of Cascavel, PR, Brazil, in 2006. We analyzed the(More)
OBJECTIVE To evaluate the nutritional status of pupils from public schools of two cities in the western part of the state of Parana according to socioeconomic status and race. METHODS 1,443 children (aged 6 - 11 years) of both genders, classified as white or black and with different socioeconomic status were evaluated by weight, height and body mass(More)
AIM To evaluate body composition of black and white schoolchildren in Brazil. METHODS The study included 1,443 children aged 6-11 years, both genders, black and white skin colors. The measures of weight, height, BMI, brachial perimeter, tricipital and subscapular skinfolds, lean and fat area of the arm were transformed into standard deviation scores(More)