Figure 2.

Comparison of serum GAS levels at different time points between the 2 groups ($\overline{x}\pm s$). The abscissa represents T0, T1, T2, and T3, while the ordinate represents GAS level. The GAS levels at T0, T1, T2, and T3 in the study group were 1,249.35±54.33, 1,092.46±45.38, 859.45±37.43, and 733.63±31.64 µg/L, respectively. The GAS levels at T0, T1, T2, and T3 in the reference group were 1,257.46±54.59, 1,135.77±42.49, 925.31±36.78, and 817.52±33.98 µg/L, respectively. *, indicates that there were significant differences in the GAS levels at T1 between the 2 groups (t=5.486; P<0.000). **, indicates that there were significant differences in the GAS levels at T2 between the 2 groups (t=9.882; P=0.000). ***, indicates that there were significant differences in the GAS levels at T3 between the 2 groups (t=14.227; P=0.000).