Various parameters for grading acne vulgaris

Abstract

Two 12-wk-long double-blind placebo-controlled studies of acne treatments were performed using 3 judges and 331 male college students. Global severity grades and papule, pustule, and comedo counts were performed every 2 wk. The data were evaluated using Pearson''s coefficeint of correlation, and results showed a high degree of correlation between global severity grades and lesion counts, as well as among judges. Data suggest that acne grading scales and papule counts are equally reproducible methods of grading inflammatory acne and that the comedo grading scale and comedo count are equally reproducible methods of grading comedonal acne.