4.13. Analysis.

Comparison 4: Topical salicylic acid versus other topical treatments, Outcome 13: Physicians' global evaluation of acne improvement (%)

Physicians' global evaluation of acne improvement (%)
Study	Time points	Salicylic acid	Topical treatments (comparator)	P value
split‐face trials
Kessler 2008	Good to fair improvement (treatment duration of 10 weeks, measured at two months post‐treatment)	81%	75% (30% glycolic acid)	Unclear, not reported. The author did not report whether there is any statistical difference between groups.