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Spirometric Reference Equations for Elderly Chinese in Jinan Aged 60-84 Years / 中华医学杂志(英文版)
Chinese Medical Journal ; (24): 1016-1022, 2018.
Artículo en Inglés | WPRIM | ID: wpr-687043
ABSTRACT
<p><b>Background</b>The interpretation of spirometry varies on different reference values. Older people are usually underrepresented in published predictive values. This study aimed at developing spirometric reference equations for elderly Chinese in Jinan aged 60-84 years and to compare them to previous equations.</p><p><b>Methods</b>The project covered all of Jinan city, and the recruitment period lasted 9 months from January 1, 2017 to September 30, 2017, 434 healthy people aged 60-84 years who had never smoked (226 females and 208 males) were recruited to undergo spirometry. Vital capacity (VC), forced VC (FVC), forced expiratory volume in 1 s (FEV), FEV/FVC, FEV/VC, FEV, peak expiratory flow, and forced expiratory flow at 25%, 50%, 75%, and 25-75% of FVC exhaled (FEF, FEF, FEF, and FEF) were analyzed. Reference equations for mean and the lower limit of normal (LLN) were derived using the lambda-mu-sigma method. Comparisons between new and previous equations were performed by paired t-test.</p><p><b>Results</b>New reference equations were developed from the sample. The LLN of FEV/FVC, FEFcomputed using the 2012-Global Lung Function Initiative (GLI) and 2006-Hong Kong equations were both lower than the new equations. The biggest degree of difference for FEV/FVC was 19% (70.46% vs. 59.29%, t = 33.954, P < 0.01) and for maximal midexpiratory flow (MMEF, equals to FEF) was 22% (0.82 vs. 0.67, t = 21.303, P < 0.01). The 1990-North China and 2009-North China equations predicted higher mean values of FEV/FVC and FEFthan the present model. The biggest degrees of difference were -4% (78.31% vs. 81.27%, t = -85.359, P < 0.01) and -60% (2.11 vs. 4.68, t = -170.287, P < 0.01), respectively.</p><p><b>Conclusions</b>The newly developed spirometric reference equations are applicable to elderly Chinese in Jinan. The 2012-GLI and 2006-Hong Kong equations may lead to missed diagnoses of obstructive ventilatory defects and the small airway dysfunction, while traditional linear equations for all ages may lead to overdiagnosis.</p>
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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Fisiología / Valores de Referencia / Pruebas de Función Respiratoria / Espirometría / Volumen Espiratorio Forzado / Estudios Transversales / Métodos Tipo de estudio: Estudio observacional / Estudio de prevalencia / Estudio pronóstico / Factores de riesgo Límite: Anciano / Aged80 / Femenino / Humanos / Masculino Idioma: Inglés Revista: Chinese Medical Journal Año: 2018 Tipo del documento: Artículo

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Texto completo: Disponible Índice: WPRIM (Pacífico Occidental) Asunto principal: Fisiología / Valores de Referencia / Pruebas de Función Respiratoria / Espirometría / Volumen Espiratorio Forzado / Estudios Transversales / Métodos Tipo de estudio: Estudio observacional / Estudio de prevalencia / Estudio pronóstico / Factores de riesgo Límite: Anciano / Aged80 / Femenino / Humanos / Masculino Idioma: Inglés Revista: Chinese Medical Journal Año: 2018 Tipo del documento: Artículo