Document Classification

Section Type: RESULTS

Text: Subepithelial collagen-band thickness increased by a median of 2. 17 m in the allergen group (interquartile range [IQR], 0. 70 to 3. 67) and 1. 94 m in the methacholine group (IQR, 0. 37 to 3. 24) (P < 0. 001 for the comparison of the two challenge groups with the two control groups) ; periodic acid-Schiff staining of epithelium (mucus glands) also increased, by a median of 2. 17 percentage points in the allergen group (IQR, 1. 03 to 4. 77) and 2. 13 percentage points in the methacholine group (IQR, 1. 14 to 7. 96) (P = 0. 003 for the comparison with controls).