2.2.2. Comparison of Changes between Groups
A Mann–Whitney U test was conducted to verify whether there was a significant difference between the groups in the amount of change after 4, 8, and 12 weeks of pre-injection. Consequently, the changes in OVAS, MMO, HVAS, and HF did not show significant differences between the experimental and control groups at all time points. In contrast, TPs showed a significant difference between the groups in terms of the amount of change after 4 weeks (