Figure 3.

Comparison of MOT 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 MOT level. The MOT levels at T0, T1, T2, and T3 in the study group were 594.35±36.17, 526.47±33.49, 452.33±25.48, and 282.34±21.37 µg/L, respectively. The MOT levels at T0, T1, T2, and T3 in the reference group were 589.47±34.15, 561.26±34.87, 503.26±24.35, and 319.55±21.69 µg/L, respectively. *, indicates that there were significant differences in the MOT levels at T1 between the 2 groups (t=5.666; P<0.000). **, indicates that there were significant differences in the MOT levels at T2 between the 2 groups (t=11.378; P=0.000). ***, indicates that there were significant differences in the MOT levels at T3 between the 2 groups (t=9.622; P=0.000).