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Geographic distribution of chronic obstructive pulmonary disease prevalence in Africa, Asia and Australasia
DESIGN: Prevalence rates from population surveys on individuals aged ≥40, with spirometry-confirmed COPD, were searched systematically. The prevalence observed in 59 selected surveys and the geographic coordinates of the places where they were conducted informed a GIS computer programme. The prevalence was represented by an ascending chromatic scale (blue-green-yellow-orange-brown-red) in the GIS maps.
RESULTS: IDW-interpolation GIS maps were obtained of all the geographic areas investigated, and even from regions lacking data. Areas of high/very high prevalence were found in: Southern Africa and in most of the Central and Eastern Africa regions; in practically all of Central Asia; in the western regions of Southern Asia; in the southern regions of the East European Plain and the West Siberian Plain of Northern Asia; and in the Malay Archipelago. Intermediate prevalence predominated in Oceania and in most of the other regions of Africa and Asia.
CONCLUSION: Despite some biases inherent to the interpolation method used in the present study, our approach provided an understandable visual perspective of the COPD prevalence distribution in these geographic regions.
Keywords: GIS; Geographic Information System; IDW; interpolation; inverse distance weighting; spatial epidemiology
Document Type: Research Article
Affiliations: 1: Alpha1-Antitrypsin Deficiency Spanish Registry (REDAAT), Fundación Respira, Spanish Society of Pneumology and Thoracic Surgery (SEPAR). Barcelona 2: Materials and Energy Department, School of Mining Engineering, Oviedo University, Oviedo 3: Internal Medicine Department, County Hospital of Jarrio, Principality of Asturias 4: Clinical Analysis Laboratory, University Hospital of Cabueñes, Gijón 5: Pneumology Department, University Hospital San Cecilio, Granada 6: Pneumology Department, Hospital Universitari Vall d'Hebron/Vall d'Hebron Research Institute (VHIR), Barcelona 7: Instituto de Investigación Hospital Universitario de la Princesa (IISP), Universidad Autónoma de Madrid, Madrid 8: Pneumology Department, Hospital Universitari Vall d'Hebron/Vall d'Hebron Research Institute (VHIR), Barcelona, CIBER de Enfermedades Respiratorias (CIBERES). Barcelona, Spain
Publication date: 01 October 2019
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