Table 2.

MRS Metabolite, MMN Amplitude and 40 Hz ASSR Power

	M (SD) EPP	M (SD) Control	Test statistic	95% CI	Effect size (d)
Metabolite concentration (i.u.)
Glx	4.93 (1.44)	4.07 (1.18)	t [51] = 2.24*	[1.64, 0.09]	0.62
NAA	4.23 (1.05)	3.71 (0.82)	t [51] = 1.85	[1.08, −0.04]	0.52
Cho	0.96 (0.23)	0.73 (0.18)	t [51] = 3.80**	[0.35, 0.11]	0.97
Cre	3.34 (0.86)	2.75 (0.77)	t [51] = 2.50*	[1.07, 0.12]	0.68
Ins	2.76 (0.88)	2.40 (0.66)	t [51] = 1.59	[0.83, −0.10]	0.45
Electrophysiological measure
MMN (μV)	−2.71 (2.76)	−2.27 (2.40)	t [45] = 0.54	[1.20, −2.07]	−0.17
40 Hz Power (μV2)	0.05 (0.05)	0.05 (0.04)	t [45] = 0.28	[0.02, −0.03]	−0.09

Note. Group differences were tested using t-tests. EPP = Early Phase Psychosis, Glx = Glutamate+Glutamine, NAA = N-Acetylasparate, Cho = Choline, Cre = creatine, Ins = Myoinositol, MMN = mismatch negativity.

^*p < 0.05,

^**p < 0.001