The Effectiveness of a 5% Retinoic Acid Peel Combined with Microdermabrasion for Facial Photoaging: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial

Table 5

Frequent adverse events reported in the study following treatment in intervention or control conditions.

Adverse events	Microdermabrasion; with tretinoin (%)	Microdermabrasion; with placebo (%)	value
Pruritus	9 (20%)	2 (4.4%)	0.02
Erythema	16 (35.6%)	9 (20%)	0.049
Scaling	13 (28.9%)	6 (13.3%)	0.036
Burning sensation	7 (15.6%)	0	0.006