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Biomedical subjects

J Fleta

Publications and source records attributed to J Fleta.

At least 37 records · Page 2Linked to original sources
PubMed1998

Skinfold thickness measurements are better predictors of body fat percentage than body mass index in male Spanish children and adolescents.

OBJECTIVE: To develop equations, from some simple anthropometric measurements, for the prediction of body density from underwater weighing in male spanish children and adolescents. SUBJECTS: One hundred and seventy-five males, aged 7.0-16.9 y, participated in this study, they were recruited from primary and secondary schools. MEASUREMENTS: Body weight and height and skinfold thicknesses by anthropometry, body density by underwater weighing. RESULTS: Correlations between body density and body mass index (BMI) were high until 14.0-16.9y. Correlations between body density and log sigma 4 skinfolds were higher than those with BMI at all ages. Log sigma 4 skinfolds explained between 61% (14.0-16.9 y) and 68% (11.0-13.9 y) of the body density variance. Regression equations for body density from BMI and triceps skinfold thickness explained between 51% (14.0-16.9y) and 68% (7.0-10.9 y) of the body density variance. CONCLUSIONS: The best estimators of body density in the children and adolescents studied were log sigma 4 skinfolds and a combination of BMI and triceps skinfold.

Adipose Tissue↗
PubMed1998

Fat distribution in obese and nonobese children and adolescents.

BACKGROUND: It is not known whether fat deposition in obese children and adolescents occurs in the body's central or peripheral regions. METHODS: A representative sample of children was drawn from the schools of Zaragoza, Spain. The population selected comprised 1728 children ranging in ages from 6 to 14.9 years. Of the original sample, 368 children (21.29%) were excluded because of chronic diseases or refusal to participate. The waist-to-hip circumference ratio and the triceps-to-subscapular skin-fold thickness ratio were calculated and served as indexes of body fat distribution. The children were divided into tertiles according to standard deviation score of body mass index. RESULTS: Both in boys and in girls, waist-to-hip circumference ratio was higher in tertile 3 than in the other two tertiles, and triceps-to-subscapular skinfold thickness ratio was lower in tertile 3 than in the other two tertiles. Waist-to-hip circumference ratio was higher and triceps-to-subscapular skinfold thickness ratio was lower in obese than in nonobese children and adolescents of both sexes. CONCLUSIONS: Increased adiposity may be accompanied by an increase of fat depot in the abdominal region. In obese children and adolescents, fat deposition seems to occur in the body's central regions.

Adipose Tissue↗
PubMed1997

Indices of body fat distribution in Spanish children aged 4.0 to 14.9 years.

BACKGROUND: Reference values for the main indices of body fat distribution in children are not available. METHODS: The study population comprised 1638 Caucasian children and adolescents: 848 boys and 790 girls, with ages ranging from 4.0 to 14.9 years, and living in the central part of Spain (Provincia de Zaragoza). The waist-to-hip circumference ratio and the triceps-to-subscapular skinfold thickness ratio were measured. RESULTS: In boys, mean waist-to-hip circumference ratio ranges from 0.834, at 13.5 years, to 0.896 at 4.5 years. In girls, waist-to-hip circumference ratio ranges from 0.756, at 14.5 years, to 0.877, at 4.5 years. We observed a decrease of waist-to-hip circumference ratio with age, especially in girls. In boys, triceps-to-subscapular skinfold thickness ratio ranges from 1.360, at age 14.5, to 1.704, at age 5.5. In girls, triceps-to-subscapular skinfold thickness ratio ranges from 1.468, at age 13.5, to 1.727, at age 9.5. We observed a decrease with age only in boys. CONCLUSIONS: We present reference values for the main indices of body fat distribution, which could be useful in clinical practice. However, research is needed that will compare these indices with data on body fat distribution obtained by a gold standard method, such as computed tomography or magnetic resonance imaging.

Adolescent↗
PubMed1996

Seasonality of cryptosporidiosis in children.

The seasonal distribution of cryptosporidiosis in children in Aragón, a region in northeastern Spain, was determined. Over a period of six years (October 1988 to September 1994), 10,034 stool samples from 4,508 children with gastrointestinal symptoms were analyzed for this purpose. The age of the patients ranged from 1 month to 14 years. Cryptosporidium oocysts were identified in 87 (1.93%) patients. Prevalence was highest (6.20%) in children aged 1 to 3 years old. The prevalence was significantly higher in the autumn-winter period (October to March) than in the spring-summer period (April to September) in the whole population (2.41% vs. 1.35%, p = 0.010) and in the 1- to 3-year-old age group (8.44% vs. 3.20%, p = 0.002), but not in the other age groups. A possible relationship of this pattern to attendance at child care centres is suggested.

Adolescent↗
PubMed1995

Detection of Cryptosporidium oocysts in extra-intestinal tissues of sheep and pigs.

Extra-intestinal infections by Cryptosporidium parvum have been detected in pigs and sheep. Detection was carried out by imprints of the mucosa of different organs and viscera in 55 sheep and 57 pigs slaughtered at three abattoirs in Zaragoza (northeast Spain). Imprints were stained by using a modified Ziehl-Neelsen technique. In addition to intestinal infections, cryptosporidial oocysts were found in the gall-bladders of two pigs which were 2 months old, and in some organs of sheep aged 5 days or more, including the gall-bladder (5), mesenteric lymph nodes (2), trachea (7), lung (3) and the uterus of one lamb.

Animals↗
PubMed1989

Relationship of body fat distribution to metabolic complications in obese prepubertal boys: gender related differences.

Our purpose was to assess the relationship of obesity and body fat distribution to serum glucose values, insulin concentration and insulin resistance in obese prepubertal boys. Thirteen obese and 15 control prepubertal boys were studied. Biceps, triceps, subscapular and suprailiac skin fold thicknesses were measured. Percentage of body fat and total body fat were calculated. Body fat distribution was assessed by analyzing the central (supra-iliac, subscapular)/peripheral (biceps, triceps) ratios. During an oral glucose tolerance test, serum glucose and insulin were measured and insulin/glucose was calculated. Body fat data and body fat distribution indices were significantly higher in the obese group. The obese population presented significantly elevated values of insulin and insulin/glucose. In the obese group insulin showed significant correlations with percentage of body fat, total body fat and subscapular skin fold thickness, whereas insulin/glucose had significant positive correlations with percentage of body fat, total body fat and supra-iliac skin fold thickness. In obese boys significant positive correlations were also shown by subscapular/supra-iliac with insulin and insulin/glucose, and by subscapular/triceps with insulin. In prepubertal boys obesity is centripetal and an upper central body fat distribution seems to be first associated with an abnormal glucose-insulin homeostasis.

Adipose Tissue↗
PubMed1987

Relationship of body fat distribution to metabolic complications in obese prepubertal girls.

The purpose of this study is to assess the relative effects of body fat distribution and obesity "per se" on serum glucose, insulin, and insulin resistance. Seventeen obese and nine nonobese control prepubertal girls were studied. Biceps, triceps, subscapular, and suprailiac skinfold thickness were measured. Percentage of body fat (% BF) and total body fat (TBF) were calculated. Body fat distribution was assessed by analyzing the central (suprailiac, subscapular)/peripheral (biceps, triceps) ratios. Oral glucose tolerance test was performed. Serum glucose and insulin were measured and insulinogenic index (insulin/glucose) was calculated. Body fat anthropometric data and body fat distribution indexes were significantly higher (p less than 0.001) in the obese group. The obese population presented significantly elevated values of glucose, insulin, and insulinogenic indexes (p less than 0.01-p less than 0.001). In the obese group, insulin showed significant positive correlations (p less than 0.05-p less than 0.001) with biceps, subscapular, and suprailiac skinfolds, % BF and TBF, whereas the insulinogenic index had positive correlations with suprailiac skinfold and TBF (p less than 0.05). Obese girls showed positive correlations between the body fat distribution indexes and insulin or insulinogenic indexes (p less than 0.05-p less than 0.001). In prepubertal girls obesity is of the centripetal (central) type. This pattern has an important role in determining the alterations in the glucose-insulin homeostasis that characterize the childhood nutritional obesity.

Adipose Tissue↗
PubMed1986

Intoxication of 76 children by chlorine gas.

A collective intoxication with chlorine gas in 76 children (21 males, 55 females; the median age was 9.9 years) is reported. They were treated with a combination of oxygen gas (O2) and corticosteroids until the symptoms disappeared.

Accidents↗