Table 1.
Summary of test–retest repeatability of different parameters using SD-tVEP
| Minimum | First quartile | Median | 95% CI | Third quartile | Maximum | IQR | |
|---|---|---|---|---|---|---|---|
| (A) 10% contrast | |||||||
| OD only | |||||||
| N75 Amp. (uV) | −2.73 | −1.25 | −0.95 | (−1.07, −0.85) | −0.82 | −0.53 | 0.43 |
| N75 Lat. (ms) | 64.00 | 74.94 | 79.67 | (75.67, 84.67) | 86.00 | 98.33 | 11.06 |
| P100 Amp. (uV) | 2.05 | 2.76 | 3.65 | (3.26, 4.95) | 5.64 | 8.51 | 2.88 |
| P100 Lat. (ms) | 105.67 | 110.28 | 115.17 | (112.0, 117.67) | 118.33 | 127.00 | 8.06 |
| Delta Amp. (N75-P100) (uV) | 2.86 | 3.55 | 4.63 | (4.12, 5.89) | 6.91 | 10.99 | 3.36 |
| OS only | |||||||
| N75 Amp. (uV) | −2.25 | −1.06 | −0.82 | (−0.95, −0.72) | −0.71 | −0.49 | 0.35 |
| N75 Lat. (ms) | 63.33 | 77.92 | 82.33 | (79.67, 85.00) | 88.14 | 97.67 | 10.22 |
| P100 Amp. (uV) | 1.75 | 2.83 | 3.35 | (2.93, 3.86) | 4.39 | 10.70 | 1.56 |
| P100 Lat. (ms) | 104.00 | 111.89 | 114.83 | (113.00, 116.67) | 119.67 | 124.33 | 7.78 |
| Delta Amp. (N75-P100) (uV) | 2.29 | 3.61 | 4.11 | (3.68, 4.91) | 5.18 | 12.83 | 1.57 |
| OU only | |||||||
| N75 Amp. (uV) | −2.21 | −1.15 | −1.02 | (−1.12, −0.81) | −0.72 | −0.31 | 0.43 |
| N75 Lat. (ms) | 57.00 | 70.92 | 76.67 | (73.33, 79.33) | 81.25 | 108.33 | 10.33 |
| P100 Amp. (uV) | 1.79 | 3.60 | 4.60 | (3.85, 5.64) | 6.06 | 12.83 | 2.46 |
| P100 Lat. (ms) | 95.67 | 104.33 | 109.33 | (105.67, 112.33) | 113.33 | 130.00 | 9.00 |
| Delta Amp. (N75-P100) (uV) | 2.26 | 4.51 | 5.55 | (4.68, 6.67) | 7.22 | 15.02 | 2.71 |
| (B) 85% contrast | |||||||
| OD only | |||||||
| N75 Amp. (uV) | −12.58 | −3.96 | −2.50 | (−3.23, −1.78) | −1.67 | −0.68 | 2.30 |
| N75 Lat. (ms) | 62.34 | 71.30 | 74.67 | (73.32, 77.33) | 77.44 | 83.66 | 6.14 |
| P100 Amp. (uV) | 1.74 | 2.38 | 4.46 | (2.88, 5.86) | 6.70 | 13.69 | 4.32 |
| P100 Lat. (ms) | 94.64 | 99.52 | 104.00 | (99.96, 106.00) | 107.05 | 111.34 | 7.53 |
| Delta Amp. (N75-P100) (uV) | 2.64 | 4.63 | 7.13 | (5.15, 9.31) | 10.18 | 26.30 | 5.55 |
| OS only | |||||||
| N75 Amp. (uV) | −13.88 | −4.19 | −2.57 | (−3.24, −1.78) | −1.69 | −0.86 | 2.49 |
| N75 Lat. (ms) | 69.99 | 75.22 | 78.00 | (75.34, 80.00) | 81.08 | 90.32 | 5.86 |
| P100 Amp. (uV) | 1.75 | 2.41 | 4.75 | (2.73, 6.12) | 6.31 | 15.15 | 3.90 |
| P100 Lat. (ms) | 96.30 | 100.89 | 103.99 | (101.98, 106.96) | 107.37 | 115.96 | 6.49 |
| Delta Amp. (N75-P100) (uV) | 3.01 | 4.61 | 6.98 | (5.07, 9.67) | 10.03 | 29.03 | 5.42 |
| OU only | |||||||
| N75 Amp. (uV) | −13.47 | −4.62 | −2.76 | (−4.10, −2.18) | −2.06 | −1.30 | 2.56 |
| N75 Lat. (ms) | 60.66 | 73.30 | 76.32 | (74.96, 78.00) | 79.14 | 88.03 | 5.84 |
| P100 Amp. (uV) | 1.79 | 2.59 | 4.72 | (2.99, 6.24) | 6.57 | 12.02 | 3.97 |
| P100 Lat. (ms) | 94.32 | 98.50 | 102.49 | (98.66, 105.66) | 107.33 | 115.16 | 8.83 |
| Delta Amp. (N75-P100) (uV) | 3.55 | 4.77 | 7.21 | (5.08, 11.16) | 11.67 | 25.50 | 6.90 |