Table 2.

Comparison of eye tracking metrices between MS and HC groups

	MS (n = 33); mean (SD), n (%)	HC (n = 25); mean (SD), n (%)	t-test/x2	p-value	Cohen’s d
Total number of fixations in the test area	129.26 (38.41)	110.00 (33.53)	t = −2.054	p = 0.045	0.534
Total number of fixations in the key area	161.13 (55.98)	163.52 (46.56)	t = 0.167	p = 0.868	0.046
Mean fixation time in the test area (ms)	182.97 (66.98)	182.17 (30.16)	t = −0.053	p = 0.958	0.015
Mean fixation time in the key area (ms)	154.29 (21.09)	160.78 (33.81)	t = 0.867	p = 0.390	0.230
Total number of visits to the key area	44.71 (11.69)	40.48 (8.72)	t = −1.460	p = 0.150	0.410
Number of visits to key area per response	1.19 (0.53)	0.88 (0.24)	t = −2.545	p = 0.014	0.753
Average number of fixations in the key area per visit	3.73 (0.80)	4.04 (1.05)	t = 1.251	p = 0.216	0.332
Average number of fixations in the test area per visit	3.00 (0.54)	2.82 (1.30)	t = −0.672	p = 0.504	0.181
Average time spent in the key area per visit (ms)	556.71 (143.17)	626.21 (119.69)	t = 1.899	p = 0.063	0.526
Average time spent in the test area per visit (ms)	523.96 (129.93)	460.24 (122.74)	t = −1.836	p = 0.072	0.504
Mean saccade velocity, total (degrees/ms)	0.066 (0.017)	0.064 (0.011)	t = −0.422	p = 0.649	0.128
Mean saccade distance, total (degrees)	4.73 (0.71)	4.99 (0.96)	t = 1.18	p = 0.265	0.288
Mean saccade distance in the key area (degrees)	2.89 (0.40)	3.36 (0.80)	t = 2.83	p = 0.007	0.733
Mean saccade distance in the test area (degrees)	2.73 (0.63)	2.68 (0.77)	t = −0.32	p = 0.751	0.086
Mean saccade velocity in the key area (degrees/ms)	0.024 (0.001)	0.026 (0.001)	t = 0.876	p = 0.385	0.244
Mean saccade velocity in the test area (degrees/ms)	0.027 (0.01)	0.025 (0.001)	t = −0.824	p = 0.414	0.229

Abbreviations: MS Multiple Sclerosis, HC Healthy Controls