Table 2 Mean N100 amplitude, T1w/T2w-ratio in AC1 and AC2 in SCZ_spect and HC.

	N100 amplitude (microvolts) Mean (SE) [95% CI]	AC1 T1w/T2w-ratio Mean (SE) [95% CI]	AC2 T1w/T2w-ratio Mean (SE) [95% CI]
SCZ_spect [n = 33]	12.19 (1.29) [9.65–14.74]	0.89 (0.002) [0.88–0.89]	0.88 (0.002) [0.87–0.88]
HC [n = 144]	15.30 (0.61) [14.09–16.51]	0.89 (0.001) [0.89–0.89]	0.88 (0.001) [0.88–0.88]
SCZ_spect vs. HC	est = -3.11	est = -1.87e–04	est=7.20e–04
	se=1.43	se=2.32e–03	se=2.34e–03
	p = 0.03*	p = 0.94	p = 0.76
	Cohen’s d = 0.42	Cohen’s d = 0.02	Cohen’s d = 0.06
	Hedges´g = 0.42	Hedges´g = 0.02	Hedges´g = 0.06

Table 2 shows mean N100 amplitude, T1w/T2w-ratio in AC1, primary auditory cortex and in AC2, secondary auditory cortex in SCZ_spect, schizophrenia spectrum disorder, and in HC, healthy controls. Estimated marginal means were calculated using analysis of covariance, where N100 amplitude, T1w/T2w-ratio in AC1 or T1w/T2w-ratio in AC2 were set as dependent variables with age, sex and diagnosis as independent variables. Estimated marginal means are provided with SE, standard error of the mean, and 95% CI, confidence interval. In addition, Table 2 shows differences in means between SCZ_spect and HC. Est, estimate; p, p-value; **, significant p-value (p < 0.017); *, nominally significant p-value that did not meet the adjusted threshold for statistical significance after Bonferroni correction. The bold values indicate significant or nominally significant p-values; N100 amplitude was nominally (p = 0.03) lower in SCZ_spect compared to HC. T1w/T2w-ratios in AC1/AC2 did not differ between SCZ_spect and HC.

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