Table 2.

 VEP features in HIV infected patients with neurological manifestations (symptomatic patients), without neurological manifestations (asymptomatic patients), and laboratory reference values

	Symptomatic patients (n = 75)	Asymptomatic patients (n = 53)	References
Abnormal VEPs, n (%)	43 (57%)‡	22 (42%)
Mean latency (SD) (ms)	115 (14)*,†	109 (9)*	100 (5)
Mean amplitudes (SD) (μV)	8 (3)*,†	9 (5)*	15 (5)

*Significantly different from reference values, †significantly different from asymptomatic patients, ‡not significantly different from asymptomatic patients.