Cases* | Comparisons* | p Value† | |
---|---|---|---|
C2 peak time (ms) | |||
120′ | 115 (83–193) | 99 (88–142) | 0.019 |
60′ | 115 (83–210)* | 106 (85–127) | 0.036 |
15′ | 128 (80–210)† | 108 (80–157) | 0.0002 |
C2 amplitude (µV) | |||
120′ | 24 (15–33) | 26 (8–54) | 0.091 |
60′ | 24 (19–34)* | 34 (12–59) | 0.003 |
15′ | 10 (10–20)† | 17 (2–30) | 0.003 |
*Data are medians with ranges given in brackets. Absent VEPs from cases are treated as having amplitudes of 0 µV and C2 peak times of 210 ms for 60′ (N=3) and for 15′ check sizes (N=19).
†p Values from Mann–Whitney tests.
VEPs, visual evoked potentials.