Increased Reid index is classically associated with?
The diagnostic feature of chronic bronchitis in the trachea and larger bronchi is enlargement of the mucus secretinggland . The magnitude of the increase insize is assessed by the ratio of the thickness of the submucosal gland layer to that of the bronchial wall (the Reid index--normally 0.4). Chronic smoking causes submucosal gland hyperophy and hyperplasia, leading to a Reid Index of >0.5 indicating chronic bronchitis.
Chronic Bronchitis
Emphysema
Bronchiectasis
Interstitial lung disease
COPD and Asthma