Mismatch Negativity and P50 Sensory Gating in Abstinent Former Cannabis Users

Table 3

(a) Mean (SD) MMN amplitude (μV) and latency (ms) at Fz and (b) median [range] P50 metrics (μV) at Cz for ex-cannabis users and healthy nonuser controls.

	Ex-cannabis users; ()	Controls; ()
(a) MMN
Duration MMN
Amplitude (μV)	−4.60 (1.26)	−5.65 (2.26)
Latency (ms)	183.9 (20.6)	183.8 (17.2)
Frequency MMN
Amplitude (μV)	−2.74 (1.21)	−3.34 (1.35)
Latency (ms)	167.6 (22.2)	173.1 (21.7)
Intensity MMN
Amplitude (μV)	−3.25 (1.51)	−2.92 (1.87)
Latency (ms)	153.6 (27.6)	142.4 (25.9)
(b) P50
P50 S1 amplitude	2.59 [0.36–5.14]	2.80 [0.39–9.52]
P50 S2 amplitude	1.83 [0.03–3.20]	1.27 [0.0–3.62]
P50 ratio	0.53 [0.01–4.19]	0.37 [0.0–1.41]
P50 difference score	1.66 [−1.15–3.12]	1.83 [−0.40–5.90]