ASSESSMENT OF ASTHMA SEVERITY IN ADULTS WITH ASTHMA TREATED BY FAMILYPRACTITIONERS, ALLERGISTS, AND PULMONOLOGISTS

OBJECTIVES. Accurate measurement of asthma severity is critical for re search evaluating asthma health outcomes. There are,however, no widely accepted asthma severity measures. A severity-of-asthma score, which is based on self-reported information was previously developed and val idated in subjects recruited from pulmonary and allergy subspecialty p ractices. The purpose of this study was to validate the severity-of-as thma score in subjects treated by family practice physicians and to co mpare asthma severity in subjects treated by family practitioners (n = 150) with those seen by allergists (n = 217) and pulmonologists (n = 384). METHODS. The study was an ongoing panel study of adults with ast hma. Subjects were a random sample of board-certified family practice, allergy, and pulmonary physicians. Each physician registered patients with asthma aged 18 to 50 years. Of 869 subjects registered, 751 (86% ) completed structured telephone interviews. The family practice panel was recruited approximately 3 years after the subspecialty panel. RES ULTS. In the family practice subjects, the severity-of-asthma score de monstrated internal consistency (Cronbach's alpha 0.76) and concurrent validity, correlating strongly with asthma-specific quality of life, SE-36 General Health and Physical Functioning scales, and subject-perc eived asthma severity. After controlling for demographic characteristi cs, a 5-point score increment was associated with increased emergency department visits, urgent physician visits, and restricted activity da ys. The mean severity score was highest in the pulmonary group (11.8 /- 6.3), followed by the allergy(10.3 +/- 5.3) and family practice (9. 3 +/- 5.5) groups. CONCLUSIONS. The severity-of-asthma score was a val id measure in generalist-treated subjects. Asthma severity varied sign ificantly by physician specialty.