Chilean reference of length at birth.

Background: To generate a reference of length at birth (LB) according to sex and gestational age (GA) of the Chilean population.

Methods: This cross-sectional observational study used public pooled Chilean newborn (NB) population data registered by the Civil Registry and Identification Service in Chile from 2000 to 2016. Multiple births, entries without information for LB, GA, and sex, and birth lengths <-4SD and > 4SD, were excluded.

Waist circumference percentiles for Hispanic-American children and comparison with other international references.

Introduction: Waist circumference (WC) constitutes an indirect measurement of central obesity in children and adolescents.

Objective: To provide percentiles of WC for Hispanic-American children and adolescents, and compare them with other international references.

Materials And Methods: The sample comprised 13 289 healthy children between 6 and 18 years coming from public schools of middle and low socioeconomic levels in different parts of Argentina, Cuba, Spain, Mexico, and Venezuela.

[Weight-for-age percentile curves for the population of Catamarca province (Argentina)].

Introduction: The assessment of fetal development and birth weight is a priority in the field of nutritional epidemiology and public health. Nowadays, the World Health Organization (WHO) does not have specific birth weight curves for the distinct gestational weeks considering that socio-economic, ecological and ethnic characteristics of the different human groups are found influencing their own growth patterns.

Objective: This research develops centile curves for weight by gestational age concerning to resident populations in the province of Catamarca.

Altitude effect on birth weight and prematurity in the Province of Catamarca (Argentina).

Objectives: To analyze the effect of altitude on weight and prematurity at birth in the Province of Catamarca (Argentina), between the years 1994 and 2003.

Methods: Records of 22,628 newborns were collected from the vital statistics of the census of Catamarca. Weight was recategorized to include low birth weight (<2,500 g), and gestational age was divided into births that had occurred before or after 37 weeks (preterm or at term births).

Weight and height percentiles calculated by the LMS method in Argentinean schoolchildren. A comparative references study.

Background: The Argentinean population is characterized by ethnic, cultural and socio-economic diversity.

Aim: To calculate the percentiles of weight-for-age (W/A) and height-for-age (H/A) of schoolchildren from Argentina employing the LMS method; and to compare the obtained percentiles with those of the international and national references.

Subjects And Methods: Anthropometric data of 18 698 students (8672 girls and 10 026 boys) of 3-13 years old were collected (2003-2008) from Buenos Aires, Catamarca, Chubut, Jujuy, La Pampa and Mendoza.

Anthropometric parameters in screening for excess of adiposity in Argentinian and Spanish adolescents: evaluation using receiver operating characteristic (ROC) methodology.

Background: Various anthropometric parameters have been proposed for defining overweight in adolescence, but few studies have evaluated their diagnostic accuracy in comparative terms, using samples from different regions.

Aim: To compare the performance of anthropometric parameters in determining the excess of adiposity in Argentinian and Spanish adolescents.

Subjects And Methods: The sample is composed of 1781 Argentinian and 1350 Spanish subjects, aged 12-17 years.