Differences in percentage predicted spirometric values obtained with thirteen reference equations applied to healthy children.

Background: There is limited information on the discrepancy between the spirometric values calculated with diverse spirometric prediction equations in normal children.

Objective: To determine the differences in percentage predicted (PP) values calculated through thirteen prediction equations (PEs) in healthy Chilean children.

Methods: We compared the PP values for FVC, FEV1, FEF25-75% and FEV1/FVC obtained by applying thirteen PEs, using GLI-2012 as a gold standard reference equation and including race neutral GLI-2022 in the analysis; PP values are from a group of 208 healthy Chilean children aged 7 to 17 years.

Allergic sensitization in low-income urban children: relationship with current symptoms of asthma and rhinitis.

Background: Recent information on the prevalence of allergic sensitization (AS) in children from low-income urban areas is limited.

Methods: We conducted a cross-sectional, randomized, population-based study to determine the prevalence of AS, and its relationship with asthma and rhinitis in low-income schoolchildren in Santiago, Chile. The parents answered a standardized questionnaire on respiratory symptoms, and a skin prick test (SPT) for common aeroallergens was performed on all children.

Hospital admission for symptoms exacerbation in 2,075 infants suffering from recurrent asthma-like symptoms: (EISL-3 South America).

Background: Contrary to what happens in children and adults, the prevalence and the factors related to hospitalisation for asthma/wheezing in infants with recurrent asthma-like symptoms are poorly known.

Methods: This study is part of the International Study of Wheezing in infants Phase 3; 2,079 infants (aged 12-18 months) with recurrent asthma-like symptoms, from 11 South American centres, were studied to determine the prevalence and the associated factors for wheezing exacerbation admission. Descriptive statistics and multivariate logistic regression were employed for analysis.

Prevalence and Determinants of Tobacco Smoking Among Low-Income Urban Adolescents.

Tobacco-smoking in children is one of the most crucial public health concerns, which could be highly prevalent in underprivileged populations. A cross sectional, random sampling survey was conducted to determine the prevalence of current tobacco-smoking and related risk factors among adolescents living in a low-income area of Santiago de Chile. Of the 2,747 adolescents participating in the study, 24.