Abstract

Background: Guidelines advocate the use of spirometry to assess lung function in asthmatic. Inhaled corticosteroid(ICS) therapy is a mainstay of treatment for asthma, but the clinical response is variable. Aim: To assess the time variation of FEV1% in treated children with Persistent Asthma (PA). Methods: 110 children with PA, with two visits between September 2011 and December 2014 at the IBIM pediatric clinic were studied. Spirometry was performed using Pony FX, Cosmed, Italy; values were expressed as %pred using GLI-2012equation. The time trend of FEV1% for each subject was estimated through separate regressions. A linear regression model for the individual slopes (FEV1% average month variations) with respect to the intercepts (initial FEV1% values) was estimated. For the 71 children which had a FEV1%<100 at the first visit, we considered a logit model to evaluate the probability of recovering for different groups, controlling for ICS. Statistical analysis were performed by means of R. Results: For a patient with an initial FEV1%=70, the expected FEV1% month variation is 3.14 (p<0.0001), it decreases by 1.09 (p<0.0001) as the initial FEV1% increases by 10. Regarding to the probability of having an improvement in the lung function (positive variation), a significant difference is observed with respect to passive smoke exposure (PSE). Indeed, the probability of recovering is lower for PSE children (OR=0.30, IC95%=[0.11-0.85]). No significant differences have been found with respect to other subgroups (e.g. for gender, BMI). Conclusions: Children with a worst initial lung condition have a higher rate of increase of the FEV1%. Children with no PSE are more likely to recover from bad lung conditions.
Lingua originaleEnglish
pagine (da-a)-
Numero di pagine0
RivistaEuropean Respiratory Journal
Volume46
Stato di pubblicazionePublished - 2015

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Smoke
Lung
Asthma
Spirometry
Linear Models
Adrenal Cortex Hormones
Italy
Logistic Models
Guidelines
Pediatrics
Therapeutics

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@article{59e8c5cefa3149178d0b909b01d2d2e8,
title = "Lower probability of FEV1 improvement in asthmatic children exposed to passive smoke",
abstract = "Background: Guidelines advocate the use of spirometry to assess lung function in asthmatic. Inhaled corticosteroid(ICS) therapy is a mainstay of treatment for asthma, but the clinical response is variable. Aim: To assess the time variation of FEV1{\%} in treated children with Persistent Asthma (PA). Methods: 110 children with PA, with two visits between September 2011 and December 2014 at the IBIM pediatric clinic were studied. Spirometry was performed using Pony FX, Cosmed, Italy; values were expressed as {\%}pred using GLI-2012equation. The time trend of FEV1{\%} for each subject was estimated through separate regressions. A linear regression model for the individual slopes (FEV1{\%} average month variations) with respect to the intercepts (initial FEV1{\%} values) was estimated. For the 71 children which had a FEV1{\%}<100 at the first visit, we considered a logit model to evaluate the probability of recovering for different groups, controlling for ICS. Statistical analysis were performed by means of R. Results: For a patient with an initial FEV1{\%}=70, the expected FEV1{\%} month variation is 3.14 (p<0.0001), it decreases by 1.09 (p<0.0001) as the initial FEV1{\%} increases by 10. Regarding to the probability of having an improvement in the lung function (positive variation), a significant difference is observed with respect to passive smoke exposure (PSE). Indeed, the probability of recovering is lower for PSE children (OR=0.30, IC95{\%}=[0.11-0.85]). No significant differences have been found with respect to other subgroups (e.g. for gender, BMI). Conclusions: Children with a worst initial lung condition have a higher rate of increase of the FEV1{\%}. Children with no PSE are more likely to recover from bad lung conditions.",
author = "Giovanna Cilluffo and Salvatore Fasola and Giuliana Ferrante and Velia Malizia and Roberta Antona and {La Grutta}, Stefania and Laura Montalbano",
year = "2015",
language = "English",
volume = "46",
pages = "--",
journal = "European Respiratory Journal",
issn = "0903-1936",
publisher = "European Respiratory Society",

}

TY - JOUR

T1 - Lower probability of FEV1 improvement in asthmatic children exposed to passive smoke

AU - Cilluffo, Giovanna

AU - Fasola, Salvatore

AU - Ferrante, Giuliana

AU - Malizia, Velia

AU - Antona, Roberta

AU - La Grutta, Stefania

AU - Montalbano, Laura

PY - 2015

Y1 - 2015

N2 - Background: Guidelines advocate the use of spirometry to assess lung function in asthmatic. Inhaled corticosteroid(ICS) therapy is a mainstay of treatment for asthma, but the clinical response is variable. Aim: To assess the time variation of FEV1% in treated children with Persistent Asthma (PA). Methods: 110 children with PA, with two visits between September 2011 and December 2014 at the IBIM pediatric clinic were studied. Spirometry was performed using Pony FX, Cosmed, Italy; values were expressed as %pred using GLI-2012equation. The time trend of FEV1% for each subject was estimated through separate regressions. A linear regression model for the individual slopes (FEV1% average month variations) with respect to the intercepts (initial FEV1% values) was estimated. For the 71 children which had a FEV1%<100 at the first visit, we considered a logit model to evaluate the probability of recovering for different groups, controlling for ICS. Statistical analysis were performed by means of R. Results: For a patient with an initial FEV1%=70, the expected FEV1% month variation is 3.14 (p<0.0001), it decreases by 1.09 (p<0.0001) as the initial FEV1% increases by 10. Regarding to the probability of having an improvement in the lung function (positive variation), a significant difference is observed with respect to passive smoke exposure (PSE). Indeed, the probability of recovering is lower for PSE children (OR=0.30, IC95%=[0.11-0.85]). No significant differences have been found with respect to other subgroups (e.g. for gender, BMI). Conclusions: Children with a worst initial lung condition have a higher rate of increase of the FEV1%. Children with no PSE are more likely to recover from bad lung conditions.

AB - Background: Guidelines advocate the use of spirometry to assess lung function in asthmatic. Inhaled corticosteroid(ICS) therapy is a mainstay of treatment for asthma, but the clinical response is variable. Aim: To assess the time variation of FEV1% in treated children with Persistent Asthma (PA). Methods: 110 children with PA, with two visits between September 2011 and December 2014 at the IBIM pediatric clinic were studied. Spirometry was performed using Pony FX, Cosmed, Italy; values were expressed as %pred using GLI-2012equation. The time trend of FEV1% for each subject was estimated through separate regressions. A linear regression model for the individual slopes (FEV1% average month variations) with respect to the intercepts (initial FEV1% values) was estimated. For the 71 children which had a FEV1%<100 at the first visit, we considered a logit model to evaluate the probability of recovering for different groups, controlling for ICS. Statistical analysis were performed by means of R. Results: For a patient with an initial FEV1%=70, the expected FEV1% month variation is 3.14 (p<0.0001), it decreases by 1.09 (p<0.0001) as the initial FEV1% increases by 10. Regarding to the probability of having an improvement in the lung function (positive variation), a significant difference is observed with respect to passive smoke exposure (PSE). Indeed, the probability of recovering is lower for PSE children (OR=0.30, IC95%=[0.11-0.85]). No significant differences have been found with respect to other subgroups (e.g. for gender, BMI). Conclusions: Children with a worst initial lung condition have a higher rate of increase of the FEV1%. Children with no PSE are more likely to recover from bad lung conditions.

UR - http://hdl.handle.net/10447/221781

M3 - Article

VL - 46

SP - -

JO - European Respiratory Journal

JF - European Respiratory Journal

SN - 0903-1936

ER -