Forced oscillation, integer and fractional-order modeling in asthma

•Our aim was to evaluate the use of fractional-order (FrOr) modeling in asthma.•We compared FrOr models with traditional parameters and an integer-order model FrOr parameters best fit the data, showing good associations with spirometry.•They also showed a high accuracy in the detection of the mild obstruction in asthma FrOr models provide meaningful information in asthmatic patients.