Change in lesion counts ‐ inflamed (percentage reduction from baseline)
Study	Subgroup	Salicylic acid	No treatment	P value
Akarsu 2012	long term: 12 weeks after start of treatment	98.2%	73.8%	Quote:"The mean percent reductions in NIL, IL and TL counts were significantly higher for patients in group 1 as opposed to the patients in group 2 at week 12".
NilFroushzadeh 2009	long term: 12 weeks after start of treatment	papules: 84.5% pustules: 90%	papules: 26.63% pustules: 80%	papules: P = 0.031; pustules: P > 0.05