Table 4. Comparison of EMG records of muscular activity for the right masseter between the two groups according to the assessment time.
*An independent-sample t-test was used to detect significant differences in EMG records of muscular activity for the right masseter (in µV) between the two groups.
BO, Botox group; PL, placebo; SD, standard deviation
| Assessment time | Group | Mean | SD | P-value* |
| Before injection | BO | 596.38 | 363.02 | 0.645 |
| PL | 533.09 | 226.19 | ||
| 2nd Week | BO | 258.80 | 160.40 | 0.013 |
| PL | 515.56 | 248.13 | ||
| 3rd Month | BO | 257.26 | 160.83 | 0.015 |
| PL | 528.66 | 274.92 | ||
| 6th Month | BO | 539.91 | 316.18 | 0.789 |
| PL | 574.61 | 251.81 |