Table 2.
Comparison of the symptoms changes pre- and post-treatment between the two study groups
| 20 Hz (n=33) Mean (SD) |
Sham (n=27) Mean (SD) |
Time | Group | Interaction between group and time of measurement | Effect size2 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Before | After | Before | After | F | p | F | p | F | p | ||
| PANSS-total | 68.15 (5.535) | 54.58（7.604） | 69.93 (6.528) | 59.85（7.735） | 171.687 | 0.000* | 5.533 | 0.026* | 3.764 | 0.057 | 0.061 |
| PANSS-positive | 14.61 (3.381) | 11.58(2.424) | 15.26 (2.669) | 12.19(2.573) | 107.405 | 0.000* | 0.901 | 0.346 | 0.006 | 0.941 | 0.000 |
| PANSS-negative | 21.70(3.349) | 16.39(2.806) | 22.63 (3.824) | 19.04(4.100) | 218.809 | 0.000* | 4.328 | 0.042* | 8.090 | 0.006* | 0.122 |
| PANSS-general | 31.85 (3.022) | 26.61(3.824) | 32.04 (3.391) | 28.63(3.387) | 63.894 | 0.000* | 2.470 | 0.121 | 2.876 | 0.095 | 0.047 |
| SANS | 48.09 (11.204) | 33.91(7.776) | 50.33 (12.551) | 41.00(12.713) | 132.484 | 0.000* | 3.013 | 0.088 | 5.632 | 0.021* | 0.089 |
| CGI | 4.88 (0.331) | 3.79 (0.600) | 4.93 (0.550) | 4.11 (0.641) | 211.336 | 0.000* | 2.259 | 0.138 | 4.436 | 0.040* | 0.071 |
Abbreviations: PANSS, Positive and Negative Syndrome Scale; SANS, Scale for the Assessment of Negative Symptoms. CGI, Clinical Global Impression.