Table 3: Comparison of the changes of tinnitus loudness in 3 periods of assessment within and between groups.

Tinnitus loudness (dB)PlaceboLaser value for between-group comparison
Mean ± SD valueMean ± SD value

Baseline 0.023 <0.001<0.001
Immediately after intervention

Baseline 0.183 <0.001<0.001
3 months after intervention

Immediately after intervention 0.421 0.0130.01
3 months after intervention