A recent investigation reveals that vocal cord dysfunction is often wrongly diagnosed as asthma.
Dr. Miles M. Weinberger, of the University of Iowa, and his colleagues carried out this study on 49 patients who were reported to be suffering from this dysfunction from 1989 to 2002. Of the 49 patients, 41 were reported to be suffering from asthma who were of the age group 8 - 25 years. According to the study, asthma co-existed as a condition in just 12 patients!
The study reveals that vocal cord dysfunction is of two types; one in which exertion causes the symptoms while the other type is the one in which asthma symptoms occur spontaneously. Of the 49 patients, 29 were found to be suffering from the former type of vocal cord dysfunction while 20 of them from the latter type.
This study is cited in "Annals of Allergy, Asthma, and Immunology."