Table 5.

Growth factors ($\overline{\mathrm{x}}\pm \mathrm{s}$)

Item	Experimental group (n = 66)	Control group (n = 40)	t	P
TGF-β (μg/L)
Before treatment	22.07 ± 2.16	21.93 ± 2.08	0.328	0.744
After treatment	30.15 ± 3.04ab	25.42 ± 2.47a	8.313	0.000
IGF-1 (μg/L)
Before treatment	83.41 ± 10.29	82.87 ± 9.83	0.266	0.791
After treatment	95.72 ± 12.06ab	89.64 ± 11.25a	2.579	0.011
FGF-2 (ng/L)
Before treatment	23.58 ± 2.47	24.01 ± 2.53	0.861	0.391
After treatment	34.64 ± 3.59ab	28.39 ± 2.92a	9.298	0.000

Compared with before treatment, ^aP < 0.05; compared with control group, ^bP < 0.05. FGF-2 fibroblast growth factor-2, IGF-1 insulin-like growth factor-1, TGF-β transforming growth factor-β