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

Table 2

Comparison of the improvement of scar between the two groups (, score).

Groups	n	ECCA		VSS
		Before treatment	After treatment	Before treatment	After treatment
Control group	350	89.12 ± 7.08	69.21 ± 3.15	8.41 ± 1.14	5.65 ± 2.86
Study group	350	89.83 ± 6.98	49.38 ± 2.69	8.39 ± 1.21	3.55 ± 1.72
T		0.875	8.631	0.147	7.707
		>0.05	<0.05	>0.05	<0.05

Note. Compared with before treatment, .