Table 2 Quantification of VEP components and comparison between groups

Good trials

63 (49)

60 (39)

45 (47)

H(2): 0.22, p = 0.894

–

    N1 latency

60 (15)

46 (30)

46 (16)

H(2): 6.85, p  = 0.033

Ctr/Del: p = 0.053

Ctr/Dup: p = 0.099

Del/Dup: p = 1.000

    P1 latency

94 (9)

92 (12)

90 (7)

H(2): 1.72, p = 0.422

–

    N2 latency

164 (71)

164 (44)

152 (81)

H(2): 0.13, p = 0.937

–

    P1-N2 time

72.0 (66.0)

72.0 (50.0)

72.0 (76.0)

H(2): 0.37, p = 0.858

–

    N1 amp

−4.5 (5.1)

−1.2 (5.4)

−3.4 (4.3)

H(2): 3.97, p = 0.137

–

    P1 amp

10.4 (8.1)

15.7 (11.2)

5.4 (9.5)

H(2): 11.92, p  = 0.003

Ctr/Del: p = 0.088

Ctr/Dup: p = 0.628

Del/Dup: p = 0.003

    N2 amp

−0.94 (11.5)

−7.45 (7.3)

−3.19 (7.2)

H(2): 1.55, p = 0.460

–

    N1-P1 amp

15.0 (17.5)

16.9 (6.1)

8.3 (11.1)

H(2): 6.81, p  = 0.033

Ctr/Del: p = 1.000

Ctr/Dup: p = 0.226

Del/Dup: p = 0.028

    P1-N2 amp

12.9 (17.6)

19.7 (16.4)

8.1 (10.3)

H(2): 10.48, p  = 0.005

Ctr/Del: p = 0.207

Ctr/Dup: p = 0.455

Del/Dup: p = 0.005