Published online December 1, 2005
PEDIATRICS Vol. 116 No. 6 December 2005, pp. e792-e797 (doi:10.1542/peds.2005-0487)

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ELECTRONIC ARTICLE

Office Spirometry in Primary Care Pediatrics: A Pilot Study

Stefania Zanconato, MD, PhD^*, Giorgio Meneghelli, MD, Raffaele Braga, Franco Zacchello, MD^*, Eugenio Baraldi, MD^* on behalf of the Working Group

^* Department of Pediatrics, University of Padova, Padova, Italy
Primary Care Pediatrics, Federazione Italiana Medici Pediatri, Italy
Valeas SpA, Milano, Italy

Objective. The aim of this study was to investigate the validity of office spirometry in primary care pediatric practices.

Methods. Ten primary care pediatricians undertook a spirometry training program that was led by 2 pediatric pulmonologists from the Pediatric Department of the University of Padova. After the pediatricians' training, children with asthma or persistent cough underwent a spirometric test in the pediatrician's office and at a pulmonary function (PF) laboratory, in the same day in random order. Both spirometric tests were performed with a portable turbine flow sensor spirometer. We assessed the quality of the spirometric tests and compared a range of PF parameters obtained in the pediatricians' offices and in the PF laboratory according to the Bland and Altman method.

Results. A total of 109 children (mean age: 10.4 years; range: 6–15) were included in the study. Eighty-five (78%) of the spirometric tests that were performed in the pediatricians' offices met all of the acceptability and reproducibility criteria. The 24 unacceptable test results were attributable largely to a slow start and failure to satisfy end-of-test criteria. Only the 85 acceptable spirometric tests were considered for analysis. The agreement between the spirometric tests that were performed in the pediatrician's office and in the PF laboratory was good for the key parameters (forced vital capacity, forced expiratory volume in 1 second, and forced expiratory flow between 25% and 75%). The repeatability coefficient was 0.26 L for forced expiratory volume in 1 second (83 of 85 values fall within this range), 0.30 L for forced vital capacity (81 values fall within this range), and 0.58 L/s for forced expiratory flow between 25% and 75% (82 values fall within this range). In 79% of cases, the primary care pediatricians interpreted the spirometric tests correctly.

Conclusions. It seems justifiable to perform spirometry in pediatric primary care, but an integrated approach involving both the primary care pediatrician and certified pediatric respiratory medicine centers is recommended because effective training and quality assurance are vital prerequisites for successful spirometry.

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Key Words: office spirometry • primary care pediatrics • asthma • children

Abbreviations: PF, pulmonary function • FEV₁, forced expiratory volume in 1 second • ATS, American Thoracic Society • FVC, forced vital capacity • FET, forced expiratory time • FEF_25–75, forced expiratory flow between 25% and 75% of expired FVC • ICC, intraclass correlation coefficient • GP, general practitioner

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Accepted Jun 24, 2005.

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