Table 6. Mean frequency results (Hz).
Before therapy mean (SD) | After therapy mean (SD) | 1-month follow-up mean (SD) | 3-months follow-up mean (SD) | *P value | |
---|---|---|---|---|---|
Open eyes | |||||
HILT | 0.39 (0.18) | 0.36 (0.22) | 0.36 (0.23) | 0.37 (0.23) | 0.8618 |
HILT (p) | 0.35 (0.21) | 0.35 (0.24) | 0.36 (0.23) | 0.36 (0.25) | 0.9022 |
LLLT | 0.36 (0.21) | 0.35 (0.25) | 0.36 (0.25) | 0.37 (0.25) | 0.9112 |
LLLT (p) | 0.36 (0.18) | 0.34 (0.20) | 0.37 (0.22) | 0.36 (0.23) | 0.9170 |
**P value | 0.7700 | 0.7890 | 0.7820 | 0.7330 | |
Closed eyes | |||||
HILT | 0.48 (0.20) | 0.45 (0.25) | 0.48 (0.31) | 0.50 (0.31) | 0.7180 |
HILT (p) | 0.51 (0.24) | 0.47 (0.30) | 0.47 (0.30) | 0.49 (0.31) | 0.7060 |
LLLT | 0.51 (0.25) | 0.48 (0.30) | 0.49 (0.29) | 0.50 (0.30) | 0.7205 |
LLLT (p) | 0.50 (0.21) | 0.48 (0.31) | 0.50 (0.30) | 0.51 (0.32) | 0.7200 |
**P value | 0.6890 | 0.6678 | 0.6780 | 0.7005 |
*Friedman ANOVA, level of significance (before vs after vs 1-month follow-up vs 3-months follow-up). **Kruskal-Wallis ANOVA, level of significance (HILT vs HILT (p) vs LLLT vs LLLT (p) group). SD: standard deviation; HILT: high-intensity laser therapy group; HILT (p): high-intensity laser therapy sham group; LLLT: low-level laser therapy group; LLLT (p): low-level laser therapy sham group.