Table 5.
Comparison Between the Different Periods According to Flash VEP Including P2 (ms), N1P1 (μv) and N2P2 (μv)
| Flash VEP | Affected (n=30) | Follow-Up | F | p | |
|---|---|---|---|---|---|
| One Month (n=30) | Three Months (n=30) | ||||
| P2 (ms) | |||||
| Mean ± SD. | 143.6 ± 15.6 | 138.1 ± 13 | 132.5 ± 12.7 | 16.465* | <0.001* |
| Median (Min. – Max.) | 145(121–170) | 135(120–170) | 130(111–165) | ||
| Sig. bet. periods | p1=0.045*, p2=0.002*, p3<0.001* | ||||
| N1P1 (μv) | |||||
| Mean ± SD. | 3.9 ± 1.9 | 4.1 ± 2 | 4.2 ± 2 | 11.662* | 0.001* |
| Median (Min. – Max.) | 3.7(1–6) | 4 (1–6.5) | 4 (1–6.5) | ||
| Sig. bet. periods | p1=0.001*, p2=0.013*, p3=1.000 | ||||
| N2P2 (μv) | |||||
| Mean ± SD. | 7.9 ± 3.4 | 8.2 ± 3.2 | 8.6 ± 3.3 | 6.572* | 0.012* |
| Median (Min. – Max.) | 9.5(1.6–12) | 9.5(2.3–11.7) | 9.5(2.5–12) | ||
| Sig. bet. periods | p1=0.449, p2=0.031*, p3=0.018* | ||||
Notes: F: F-test (ANOVA) with repeated measures, Sig. bet. periods was done using post hoc test (adjusted Bonferroni). p: p value for comparing between the different periods. p1: p value for comparing between affected and one month follow-up. p2: p value for comparing between affected and three months follow-up. p3: p value for comparing between one month and three months follow-up. *: Statistically significant at p ≤ 0.05.