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Martins C, Severo M, Silva D, Barros H, Moreira A. Development and validation of predictive equations for spirometry in Portuguese children. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. GLOBAL 2023; 2:100084. [PMID: 37780790 PMCID: PMC10509892 DOI: 10.1016/j.jacig.2023.100084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/16/2022] [Accepted: 10/19/2022] [Indexed: 10/03/2023]
Abstract
Background There are no data on lung function reference values for Portuguese children, and the contribution from the Portuguese data set in the Global Lung Function Initiative (GLI) is scant. Objectives We aimed to estimate new up-to-date reference values for Portuguese children by fitting a multivariable regression model to a general population sample. Further, we intended to assess the external validity of the obtained reference values and to compare them to the GLI reference values. Methods A random sample of 858 children from 20 primary schools were screened by health questionnaire, physical examination, and spirometry. Spirometric parameters recorded were FVC, FEV1, and FEF25-75. Multiple regression models were used to derive reference equations. Results Overall, 481 children, aged between 7 and 12 years, 267 boys (55.5%), were included. Boys had higher values for FVC and FEV1 than girls (P < .05). The strongest correlation was found for FVC with height (r = 0.71 for boys and 0.70 for girls), while the lowest correlation was observed in both sexes for FEF25-75 with age (r = 0.23). Height was the most significant predictor of FVC, FEV1, and FEF25-75 in our models. Weight and body mass index were not significant predictors for boys but had a significant effect on girls' equations for all spirometry parameters. Compared to obtained reference equations with GLI, they performed better for FVC in boys, FEV1 in girls, and FEF25-75 in both boys and girls. Conclusion We offer up-to-date reference values of spirometry for Portuguese children that can be used in clinical practice and research.
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Affiliation(s)
- Carla Martins
- Department of Immunoallergology, Centro Hospitalar de São João, University of Porto, Porto
- EPIUnit, Institute of Public Health, University of Porto, Porto
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto
- Basic and Clinical Immunology Unit, Department of Pathology, Faculty of Medicine, University of Porto, Porto
| | - Milton Severo
- EPIUnit, Institute of Public Health, University of Porto, Porto
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto
- Instituto de Ciências Biomédicas Abel Salazar, University of Porto, Porto
| | - Diana Silva
- Department of Immunoallergology, Centro Hospitalar de São João, University of Porto, Porto
- EPIUnit, Institute of Public Health, University of Porto, Porto
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto
- Basic and Clinical Immunology Unit, Department of Pathology, Faculty of Medicine, University of Porto, Porto
| | - Henrique Barros
- EPIUnit, Institute of Public Health, University of Porto, Porto
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto
- Predictive Medicine and Public Health Department of Public Health and Forensic Sciences and Medical Education, Faculty of Medicine, University of Porto (FMUP), Porto
| | - Andre Moreira
- Department of Immunoallergology, Centro Hospitalar de São João, University of Porto, Porto
- EPIUnit, Institute of Public Health, University of Porto, Porto
- Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto
- Basic and Clinical Immunology Unit, Department of Pathology, Faculty of Medicine, University of Porto, Porto
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Gatto F, Bedregal P, Ubilla C, Barrientos H, Caussade S. [Quality scale for preschool spirometry interpretation]. REVISTA CHILENA DE PEDIATRIA 2017; 88:58-65. [PMID: 28288226 DOI: 10.1016/j.rchipe.2016.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/08/2016] [Indexed: 06/06/2023]
Abstract
UNLABELLED Since 2007, there are international guidelines for implementation and interpretation of spirometry in preschool children. A percentage of these patients cannot obtain maneuvers that meet all eligibility criteria. The objective of this study was to develop a quality scale for interpreting these partially acceptable spirometry. MATERIAL AND METHOD Delphi methodology was used, which allows to reach consensus among experts analyzing a defined problem. We invited to participate pediatric pneumologists dedicated to lung function and who participated actively in scientific specialty societies in Chile. Successive rounds were conducted with questionnaires about criteria used to assess spirometry in preschool children. These criteria define the acceptability of spirometric maneuvers according to international guidelines. Proposed quality grades were very good, good, fair and bad. RESULTS Thirteen of the 15 invited experts accepted our invitation. In the first round 9 disagreed with the degree of regular quality. In the second round this was removed and 11 experts answered, 9 of them agreed with the use of this new version. The most contentious criterion was the end of expiration. CONCLUSION Most experts agreed with the final scale, using very good, good and bad judgments. This would help to improve the performance of spirometry in children between 2 and 5 years.
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Affiliation(s)
- Francisca Gatto
- Pediatría, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Paula Bedregal
- Departamento de Salud Pública, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Carlos Ubilla
- Departamento de Pediatría Norte, Hospital Roberto del Río, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Hortensia Barrientos
- Departamento de Pediatría, Hospital Clínico San Borja Arriarán, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Solange Caussade
- Departamento de Cardiología y Enfermedades Respiratorias Pediátricas, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
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