Subjects and methods
20 patients with stable COPD scores of P22 for anxiety on
BAI scoring participated in the study, further 20 patients,
matched for severity of dyspnea and disability, were chosen
and agreed to act as controls. Exclusion criteria for patient
are chest infection within 1 month of the start of the study.
Bronchodilators were omitted four hours before initial measurements on each day of the test .Verbal informed consent was accepted from all participants.