Table 3.

The proportion of normal and abnormal PRVEPs test results.

Parameters		Results	Controls	Group A	Group B
60 min PRVEP test	P100 latency	Normal	N = 58 (58%)	N = 24 (24%)	N = 5 (6.6%)
		Abnormal	N = 42 (42%)	N = 76 (76%)	N = 71 (93.4%)
	P100 amplitude	Normal	N = 51 (51%)	N = 39 (39%)	N = 15 (19.7%)
		Abnormal	N = 49 (49%)	N = 61 (61%)	N = 61 (80.3%)
15 min PRVEP test	P100 latency	Normal	N = 50 (50%)	N = 4 (4%)	N = 0 (0%)
		Abnormal	N = 50 (50%)	N = 96 (96%)	N = 76 (100%)
	P100 amplitude	Normal	N = 49 (49%)	N = 24 (24%)	N = 8 (10.5%)
		Abnormal	N = 51 (51%)	N = 76 (76%)	N = 68 (89.5%)