Comparação entre valores espirométricos de referência obtidos a partir das equações de Knudson e de Pereira Adultos

Correlation between trunk control, respiratory muscle strength and spirometry in patients with stroke: An observational study

“…The consistence of the measures was confirmed by using a difference smaller than 10% between the performed maneuvers. Percentage values relative to the predicted indexes were used for age, weight, height and sex of the tested individual, according to the Knudson's equations (Knudson et al, 1976; Ladosky et al, 2001) We used percentages because these are related to the body features of each individual and thus better represent the patients.…”

Novos valores de referência para espirometria forçada em brasileiros adultos de raça branca

“…The comparison of a small number of normal individuals to find an approximate equation can be misleading. (11,12) Reference values are obtained from a population sample. Five variables must be considered: sample selection; anthropometric variables; diverse variables; test selection/measurement instrument; and regression models.…”

Validação de novos valores previstos brasileiros para a espirometria forçada na raça branca e comparação com os valores previstos obtidos por outras equações de referência

“…A comparison between the theoretical values obtained for Brazilians in 1992 (3) and those obtained by Knudson et al (6) revealed that the discrepancies result in the spirometric diagnosis constantly changing. (7) However, various laboratories continue to use the values obtained by Knudson et al as reference values.…”