Rationale: Despite the high burden of respiratory disease, no spirometry reference values for African children are available.Objectives: Investigate whether the Global Lung Initiative (GLI-2012) reference values for spirometry are appropriate for children in sub-Saharan Africa and assess the impact of malnutrition on lung function.Methods: Anthropometry and spirometry were obtained in children aged 6 to 12 years from urban and semiurban schools in three African countries. Spirometry z-scores were derived using the GLI-2012 prediction equations for African Americans. Thinness (body mass index z-score < -2) was a surrogate for malnutrition. Spirometry outcomes were compared with those of African American children from the third National Health and Nutrition Survey.Measurements and Main Results: Spirometry data were analyzed from 1,082 schoolchildren (51% boys) aged 6.0 to 12.8 years in Angola (n = 306), Democratic Republic of the Congo (n = 377), and Madagascar (n = 399). GLI-2012 provided a good fit with mean (SD) z-scores of -0.11 (0.83) for FEV1, -0.08 (0.86) for FVC, and -0.07 (0.83) for FEV1/FVC. Because of low scatter, the fifth centile corresponded to -1.3 z-scores in boys and -1.5 z-scores in girls. Malnourished African children had a normal FEV1/FVC ratio but significant reductions of similar to 0.5 z-scores (similar to 5%) in FEV1 and FVC compared with African American peers from the third National Health and Nutrition Survey. Children in Angola had the lowest, and those in Madagascar had the highest, zFEV(1) and zFVC.Conclusions: The results of this study support the use of GLI-2012 reference values for schoolchildren in sub-Saharan Africa. Malnutrition affects body growth, leading to a proportionately smaller FEV1 and FVC without respiratory impairment, as shown by the normal FEV1/FVC ratio.

Evaluation of the Global Lung Initiative 2012 Reference Values for Spirometry in African Children / Arigliani, M; Canciani, Mc; Mottini, G; Altomare, M; Magnolato, A; Clemente, Svl; Tshilolo, L; Cogo, P; Quanjer, Ph. - In: AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE. - ISSN 1073-449X. - 195:2(2017), pp. 229-236. [10.1164/rccm.201604-069300]

Evaluation of the Global Lung Initiative 2012 Reference Values for Spirometry in African Children

Altomare, M;
2017

Abstract

Rationale: Despite the high burden of respiratory disease, no spirometry reference values for African children are available.Objectives: Investigate whether the Global Lung Initiative (GLI-2012) reference values for spirometry are appropriate for children in sub-Saharan Africa and assess the impact of malnutrition on lung function.Methods: Anthropometry and spirometry were obtained in children aged 6 to 12 years from urban and semiurban schools in three African countries. Spirometry z-scores were derived using the GLI-2012 prediction equations for African Americans. Thinness (body mass index z-score < -2) was a surrogate for malnutrition. Spirometry outcomes were compared with those of African American children from the third National Health and Nutrition Survey.Measurements and Main Results: Spirometry data were analyzed from 1,082 schoolchildren (51% boys) aged 6.0 to 12.8 years in Angola (n = 306), Democratic Republic of the Congo (n = 377), and Madagascar (n = 399). GLI-2012 provided a good fit with mean (SD) z-scores of -0.11 (0.83) for FEV1, -0.08 (0.86) for FVC, and -0.07 (0.83) for FEV1/FVC. Because of low scatter, the fifth centile corresponded to -1.3 z-scores in boys and -1.5 z-scores in girls. Malnourished African children had a normal FEV1/FVC ratio but significant reductions of similar to 0.5 z-scores (similar to 5%) in FEV1 and FVC compared with African American peers from the third National Health and Nutrition Survey. Children in Angola had the lowest, and those in Madagascar had the highest, zFEV(1) and zFVC.Conclusions: The results of this study support the use of GLI-2012 reference values for schoolchildren in sub-Saharan Africa. Malnutrition affects body growth, leading to a proportionately smaller FEV1 and FVC without respiratory impairment, as shown by the normal FEV1/FVC ratio.
2017
spirometry; pediatrics; reference values; Africa; malnutrition
01 Pubblicazione su rivista::01a Articolo in rivista
Evaluation of the Global Lung Initiative 2012 Reference Values for Spirometry in African Children / Arigliani, M; Canciani, Mc; Mottini, G; Altomare, M; Magnolato, A; Clemente, Svl; Tshilolo, L; Cogo, P; Quanjer, Ph. - In: AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE. - ISSN 1073-449X. - 195:2(2017), pp. 229-236. [10.1164/rccm.201604-069300]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1629660
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 50
  • ???jsp.display-item.citation.isi??? 47
social impact