Fig. 2
Comparison of BCS scores in the three groups (\(\overline{x}\) ±s). Note: The abscissa indicates the low concentration group, medium concentration group, and high concentration group, respectively, and the ordinate indicates the BCS score, in points. The BCS scores of the low, medium, and high concentration groups were (1.15 ± 0.27), (2.31 ± 0.42), and (3.35 ± 0.51), respectively. * indicates a significant difference in BCS scores between the low and medium concentration groups (t = 12.725, P < 0.001). ** indicates a significant difference in BCS scores between the low concentration group and the high concentration group (t = 20.881, P < 0.001). *** indicates a significant difference in BCS scores between the medium concentration group and the high concentration group (t = 8.622, P < 0.001)