AX: integrated area of respiratory reactance between X5 and resonant frequency; BDR: bronchodilator responsiveness; BMI: body mass index; FEV1: forced expiratory volume in 1 s; Fres: resonant frequency; FVC: forced vital capacity; IQR: interquartile range; MMEF: maximal mid-expiratory flow rate; R5: whole-breath respiratory system resistance at 5 Hz; R5–19: difference in whole-breath respiratory resistance between 5 Hz and 19 Hz; X5: whole-breath respiratory system reactance at 5 Hz.
Declarations
Acknowledgments
The author thanks Mrs Manjula R, Mrs Rajyalakshmi Kundrapu and Mr Bheem Prasad Jaiswal for their assistance with study procedures.
Author contributions
SD: Conceptualization, Supervision, Writing—original draft, Writing—review & editing. AM: Investigation, Validation. Both authors read and approved the submitted version.
Conflicts of interest
The authors declare that they have no conflicts of interest.
Ethical approval
The study was approved by the Institutional Ethics Committee of All India Institute of Medical Sciences, Raipur, India (Approval No. 4046/IEC-AIIMSRPS/2023, dated 31 October 2023) and complies with the Declaration of Helsinki.
Consent to participate
Informed consent to participate in the study was obtained from all participants.
Consent to publication
Not applicable.
Availability of data and materials
The data of this manuscript could be available from the corresponding author upon reasonable request.
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