Table 2.

Acne scar grading according to Goodman and Baron

	PRP (n = 25)	Er-YAG laser (n = 25)	Both (n = 25)	P value
Pretreatment				0.831a
Macular	0 (0%)	0 (0%)	0 (0%)
Mild	4 (16%)	5 (20%)	3 (12%)
Moderate	13 (52%)	14 (56%)	14 (56%)
Severe	8 (32%)	6 (24%)	8 (32%)
Posttreatment				0.004a*
Macular	2 (8%)	5 (20%)	3 (12%)
Mild	7 (28%)	11 (44%)	17 (68%)
Moderate	11 (44%)	7 (28%)	5 (20%)
Severe	5 (20%)	2 (8%)	0 (0%)
P valuea	P1 = 0.001	P2 = 0.007	P3 < 0.001

* Significant

^aChi-square test was used to compare the proportion difference between groups

P1 = PRP versus laser, P2 = laser versus both, P3 = PRP versus both