Effect and Safety Analysis of PRP and Yifu Combined with Ultrapulsed CO₂ Lattice Laser in Patients with Sunken Acne Scar

Table 4

Comparison of the occurrence of adverse reactions between the two groups (n (%)).

Groups	N	Erythema	Edema	Pigmentation	Total occurrence
Control group	350	30 (8.57)	35 (10.00)	35 (10.00)	100 (28.57)
Study group	350	21 (6.00)	25 (7.33)	14 (4.00)	60 (17.33)
χ^2					5.439
					<0.05