Bronchodilator responsiveness using spirometry in healthy and asthmatic preschool children

Luis Miguel Borrego, Janet Stocks, Isabel Almeida, Sanja Stanojevic, João Antunes, Paula Leiria-Pinto, José E. Rosado-Pinto, Ah Fong Hoo

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Objective: To assess repeatability and reproducibility of spirometry measurements, and bronchodilator responsiveness (BDR), in healthy 3-6-year-old preschool children and those with asthma. Design: Spirometry was performed before and 20 minutes after administering either inhaled placebo (for repeatability) or 400 μg salbutamol (for BDR) on two separate occasions (reproducibility) 3-23 days apart in asthmatic preschoolers and healthy controls. Settings: Lung Function Laboratory, Hospital de Dona Estefania, Lisbon. Participants: Healthy preschool children and those with physician-diagnosed asthma, recruited from local Health Clinics and Outpatient Clinic. Main outcome measures: Paired measurements of forced expired volume in 0.75 s (FEV0.75) and forced mid-expiratory flows (FEF 25-75). Results: Technically successful baseline results were obtained in 86% of children assessed. Paired data were obtained in 43 asthmatic and 22 controls (median (range) age: 5.1 (3.4-6.8) years). Baseline FEV 0.75 was significantly lower in asthmatic children (mean (SD): 90 (15)% predicted) than in controls (102 (13) % predicted; p<0.001). Within-occasion coefficient of repeatability following placebo was similar in both groups, being 10.4% in asthma and 13.2% in controls for FEV0.75. Following bronchodilator, FEV0.75 increased significantly more in asthmatic preschoolers (mean (SD): 15.0 (12) %) than in controls (4.5 (5) %; p<0.001), with no significant difference between groups post-bronchodilator. Between-occasion variability was similar to within-day repeatability in controls, but almost twice as high in asthmatic children. Conclusions: BDR can be assessed reliably using FEV0.75 in wheezy preschoolers, provided within-subject variability and responsiveness in health are taken into consideration.

Original languageEnglish
Pages (from-to)112-117
Number of pages6
JournalArchives of Disease in Childhood
Volume98
Issue number2
DOIs
Publication statusPublished - 1 Feb 2013

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Bronchodilator Agents
Spirometry
Preschool Children
Asthma
Placebos
Hospital Laboratories
Albuterol
Glucosamine
Health
Ambulatory Care Facilities
Healthy Volunteers
Outcome Assessment (Health Care)
Physicians
Lung

Cite this

Borrego, Luis Miguel ; Stocks, Janet ; Almeida, Isabel ; Stanojevic, Sanja ; Antunes, João ; Leiria-Pinto, Paula ; Rosado-Pinto, José E. ; Hoo, Ah Fong. / Bronchodilator responsiveness using spirometry in healthy and asthmatic preschool children. In: Archives of Disease in Childhood. 2013 ; Vol. 98, No. 2. pp. 112-117.
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abstract = "Objective: To assess repeatability and reproducibility of spirometry measurements, and bronchodilator responsiveness (BDR), in healthy 3-6-year-old preschool children and those with asthma. Design: Spirometry was performed before and 20 minutes after administering either inhaled placebo (for repeatability) or 400 μg salbutamol (for BDR) on two separate occasions (reproducibility) 3-23 days apart in asthmatic preschoolers and healthy controls. Settings: Lung Function Laboratory, Hospital de Dona Estefania, Lisbon. Participants: Healthy preschool children and those with physician-diagnosed asthma, recruited from local Health Clinics and Outpatient Clinic. Main outcome measures: Paired measurements of forced expired volume in 0.75 s (FEV0.75) and forced mid-expiratory flows (FEF 25-75). Results: Technically successful baseline results were obtained in 86{\%} of children assessed. Paired data were obtained in 43 asthmatic and 22 controls (median (range) age: 5.1 (3.4-6.8) years). Baseline FEV 0.75 was significantly lower in asthmatic children (mean (SD): 90 (15){\%} predicted) than in controls (102 (13) {\%} predicted; p<0.001). Within-occasion coefficient of repeatability following placebo was similar in both groups, being 10.4{\%} in asthma and 13.2{\%} in controls for FEV0.75. Following bronchodilator, FEV0.75 increased significantly more in asthmatic preschoolers (mean (SD): 15.0 (12) {\%}) than in controls (4.5 (5) {\%}; p<0.001), with no significant difference between groups post-bronchodilator. Between-occasion variability was similar to within-day repeatability in controls, but almost twice as high in asthmatic children. Conclusions: BDR can be assessed reliably using FEV0.75 in wheezy preschoolers, provided within-subject variability and responsiveness in health are taken into consideration.",
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Bronchodilator responsiveness using spirometry in healthy and asthmatic preschool children. / Borrego, Luis Miguel; Stocks, Janet; Almeida, Isabel; Stanojevic, Sanja; Antunes, João; Leiria-Pinto, Paula; Rosado-Pinto, José E.; Hoo, Ah Fong.

In: Archives of Disease in Childhood, Vol. 98, No. 2, 01.02.2013, p. 112-117.

Research output: Contribution to journalArticle

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T1 - Bronchodilator responsiveness using spirometry in healthy and asthmatic preschool children

AU - Borrego, Luis Miguel

AU - Stocks, Janet

AU - Almeida, Isabel

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AU - Antunes, João

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AU - Rosado-Pinto, José E.

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N2 - Objective: To assess repeatability and reproducibility of spirometry measurements, and bronchodilator responsiveness (BDR), in healthy 3-6-year-old preschool children and those with asthma. Design: Spirometry was performed before and 20 minutes after administering either inhaled placebo (for repeatability) or 400 μg salbutamol (for BDR) on two separate occasions (reproducibility) 3-23 days apart in asthmatic preschoolers and healthy controls. Settings: Lung Function Laboratory, Hospital de Dona Estefania, Lisbon. Participants: Healthy preschool children and those with physician-diagnosed asthma, recruited from local Health Clinics and Outpatient Clinic. Main outcome measures: Paired measurements of forced expired volume in 0.75 s (FEV0.75) and forced mid-expiratory flows (FEF 25-75). Results: Technically successful baseline results were obtained in 86% of children assessed. Paired data were obtained in 43 asthmatic and 22 controls (median (range) age: 5.1 (3.4-6.8) years). Baseline FEV 0.75 was significantly lower in asthmatic children (mean (SD): 90 (15)% predicted) than in controls (102 (13) % predicted; p<0.001). Within-occasion coefficient of repeatability following placebo was similar in both groups, being 10.4% in asthma and 13.2% in controls for FEV0.75. Following bronchodilator, FEV0.75 increased significantly more in asthmatic preschoolers (mean (SD): 15.0 (12) %) than in controls (4.5 (5) %; p<0.001), with no significant difference between groups post-bronchodilator. Between-occasion variability was similar to within-day repeatability in controls, but almost twice as high in asthmatic children. Conclusions: BDR can be assessed reliably using FEV0.75 in wheezy preschoolers, provided within-subject variability and responsiveness in health are taken into consideration.

AB - Objective: To assess repeatability and reproducibility of spirometry measurements, and bronchodilator responsiveness (BDR), in healthy 3-6-year-old preschool children and those with asthma. Design: Spirometry was performed before and 20 minutes after administering either inhaled placebo (for repeatability) or 400 μg salbutamol (for BDR) on two separate occasions (reproducibility) 3-23 days apart in asthmatic preschoolers and healthy controls. Settings: Lung Function Laboratory, Hospital de Dona Estefania, Lisbon. Participants: Healthy preschool children and those with physician-diagnosed asthma, recruited from local Health Clinics and Outpatient Clinic. Main outcome measures: Paired measurements of forced expired volume in 0.75 s (FEV0.75) and forced mid-expiratory flows (FEF 25-75). Results: Technically successful baseline results were obtained in 86% of children assessed. Paired data were obtained in 43 asthmatic and 22 controls (median (range) age: 5.1 (3.4-6.8) years). Baseline FEV 0.75 was significantly lower in asthmatic children (mean (SD): 90 (15)% predicted) than in controls (102 (13) % predicted; p<0.001). Within-occasion coefficient of repeatability following placebo was similar in both groups, being 10.4% in asthma and 13.2% in controls for FEV0.75. Following bronchodilator, FEV0.75 increased significantly more in asthmatic preschoolers (mean (SD): 15.0 (12) %) than in controls (4.5 (5) %; p<0.001), with no significant difference between groups post-bronchodilator. Between-occasion variability was similar to within-day repeatability in controls, but almost twice as high in asthmatic children. Conclusions: BDR can be assessed reliably using FEV0.75 in wheezy preschoolers, provided within-subject variability and responsiveness in health are taken into consideration.

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