Table 3.

Unadjusted dependent measures for prosaccade and antisaccade tasks at each time point in each group for participants who repeated testing.

			C (N = 5)		PD (N = 9)		MSA (N = 6)
			T1	T2	T1	T2	T1	T2
Prosaccade	Error rate (%)	Mean (±SE) [Median]	0.4 (±0.4) [0.0]	1.7 (±0.8) [2.1]	1.4 (±0.8) [0.0]	1.5 (±0.8) [0.0]	1.5 (±0.7) [1.0]	2.7 (±2.7)a [0.0]
		Changes within groups, test statistics [p]	Z = 1.18 [p = 0.24]		Z = −0.00 [p = 1.00]		Z = 1.22 [p = 0.22]
		Changes among groups, test statistics [p]	χ2(2) = 1.09 [p = 0.58]
	Latency (ms)	Mean (±SE) [Min, Max]	241 (±12) [219, 287]	235 (±6) [202, 254]	247 ± 10 [207, 305]	254 (±9) [227, 297]	332 (±34)a [230, 403]	308 (±24)a [225, 358]
		Changes within groups, test statistics [p]	t(31) = −0.64 [p = 0.53]		t(31) = 0.88 [p = 0.39]		t(31) = −2.30 [p = 0.028]
		Changes among groups, test statistics [p]	F(2, 31) = 2.83 [p = 0.074]
Antisaccade	Error rate (%)	Mean (±SE) [Median]	16.2 (±2.0) [16.7]	12.5 (±2.5) [11.9]	37.6 (±7.8) [38.3]	34.8 (±8.8) [21.3]	37.8 (±10.8) [26.4]	45.7 (±12.8) [39.7]
		Changes within groups, test statistics [p]	Z = −0.97 [p = 0.33]		Z = −0.77 [p = 0.44]		Z = 1.35 [p = 0.18]
		Changes among groups, test statistics [p]	χ2(2) = 2.55 [p = 0.28]
	Latency (ms)	Mean (±SE) [Min, Max]	409 (±37) [312, 504]	378 (±38) [281, 505]	430 (±31) [284, 586]	407 (±27) [295, 539]	445 (±38) [315, 567]	440 (±33) [341, 555]
		Changes within groups, test statistics [p]	t(33) = −2.11 [p = 0.043]		t(33) = −2.24 [p = 0.032]		t(33) = −0.13 [p = 0.90]
		Changes among groups, test statistics [p]	F(2, 33) = 1.06 [p = 0.36]

C, controls; PD, Parkinson’s disease; MSA, multiple system atrophy.

p 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.

^aOne data point missing.