Rosacea Treatment Satisfaction: Matching Adjusted Indirect Treatment Comparison Analysis of Metronidazole Gel or Cream vs Azelaic Acid Foam

Objective To assess differences in patient-reported treatment side effects and concerns associated with azelaic acid 15% foam (AAF) vs metronidazole cream (MC) and metronidazole gel (MG). Methods This study used matching-adjusted indirect comparison (MAIC) to compare patient-reported outcomes from survey data evaluating rosacea treatments. Outcomes of interest included percentages of patients reporting concerns and side effects and measures of importance of the concerns and tolerability of the side effects. Patients in each analysis (MG vs AAF and MC vs AAF) were matched using stabilized inverse propensity scores. Results When compared to AAF, MG-treated patients more frequently reported concerns with treatment efficacy (54% vs 4%), application (7% vs 3%), and treatment side effects. MC-treated patients more frequently reported concerns with treatment efficacy (61% vs 5%) and dryness (8% vs 5%). AAF-treated patients more frequently reported concerns with cost of treatment compared with MG (7% vs 1%) and MC (9% vs 4%). Among patients reporting concerns, level of importance associated with these concerns was similar for AAF-treated patients compared with MG- and MC-treated patients. When compared to AAF-treated patients, MG-treated patients more frequently reported side effects of dryness (26% vs 15%) and uneven skin tone (3% vs 0%), and MC-treated patients more frequently reported side effects of burning (7% vs 3%), itching (7% vs 5%), and redness (7% vs 5%). MG- and MC-treated patients indicated greater intolerance for reported side effects than AAF-treated patients. Conclusions MG- and MC-treated patients more frequently reported treatment concerns and side effects than AAF-treated patients, and tolerability of those side effects was higher for patients treated with AAF. While treatment cost is a more frequent concern in patients treated with AAF, these patients less frequently reported concerns with treatment efficacy and reported similar or greater tolerance to side effects than patients treated with either MC or MG. J Drugs Dermatol. 2020;19(3): doi:10.36849/JDD.2020.3679.