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To compare FEV1 and FVC, calculated using three sets of reference equations (devised by Polgar &amp; Promadhat, Hsu et al. and Mallozi in 1971, 1979 and 1995, respectively) and to determine whether the three are similar in predicting lung function in children and adolescents with distinct body mass indices (BMIs).

Comparação entre três equações de referência para a espirometria em crianças e adolescentes com diferentes índices de massa corpórea