<prompt> Reids Index is? -Increased in Chronic BronchitisDecreased in Chronic BronchitisIncreased in Bronchial AsthmaDecreased in Bronchial Asthma  <response>: There is histologic definition of chronic bronchitis by increased Reid index. Reid index is the ratio between thickness of the submucosal mucus glands i.e. hyperophy and hyperplasia in the cailage-containing large airways to that of the total bronchial wall. TEXTBOOK OF PATHOLOGY 6TH EDITION HARSH MOHAN PAGE NO:478 