Table 2.
Time point 1 unadjusted dependent measures for prosaccade and antisaccade tasks for control (C), Parkinson’s disease (PD), and multiple system atrophy (MSA) groups.
| C (N = 20) | PD (N = 21) | MSA (N = 11) | Test statistics [pa] | ||
|---|---|---|---|---|---|
| Prosaccade | Error rate, %, mean (±SE) [Min, Median, Max] | 0.6 (±0.4) [0.0, 0.0, 8.5] | 1.5 (±0.5) [0.0, 0.0, 8.5] | 2.7 (±1.0) [0.0, 2.1, 9.3] | χ2 (2) = 6.06 [p = 0.048] |
| Latency, ms, mean (±SE) [Min, Max] | 260 (±10) [202, 379] | 267 (±8) [207, 353] | 318 (±20) [230, 403] | F(2, 48) = 40.92 [p < 0.001] | |
| Antisaccade | Error rate, %, mean (±SE) [Min, Median, Max] | 18.2 (±3.0) [0.0, 16.8, 54.3] | 43.2 (±4.9) [4.4, 45.5, 79.1] | 42.6 (±8.0)b [16.7, 34.1, 85.0] | χ2(2) = 86.26 [p < 0.001] |
| Latency, ms, mean (±SE) [Min, Max] | 431 (±19) [312, 581] | 446 (±18) [284, 586] | 456 (±30)b [315, 577] | F(2, 46) = 1.77 [p = 0.18] | |
ap Values (p) for age adjusted group effects using generalized linear model with Poisson link for error rate and one way analysis of variance for latency.
bAs indicated in the Section “Data Analysis,” 2 MSA subjects did not perform the antisaccade task (n = 9 for these means).