Table 1.

Association of subjective effects measures with amplitude of low frequency fluctuations (ALFF) in blood-oxygenation level-dependent (BOLD) signal in left and right claustrum, insula, and putamen regions of interest. Statistics are limited to equations involving a subjective effect that significantly predicted ALFF in at least one region of interest. ß = standardized regression coefficient of the independent variable. Equations where the independent variable is significant (critical α = 0.05, uncorrected) are presented in bold font. MEQ: mystical experience questionnaire.

Equation (dependent variable ~ independent variable)	ß	t	F	p (unc)	R2adj
left claustrum ALFF ~ overall strength of drug effect	−0.0008	2.069	4.28	0.059	0.189
left claustrum ALFF ~ brief total MEQ	−0.008	2.239	5.01	0.043	0.223
left claustrum ALFF ~ ineffability	−0.0006	2.519	6.35	0.026	0.276
right claustrum ALFF ~ overall strength of drug effect	−0.001	3.269	10.7	0.006	0.409
right claustrum ALFF ~ brief total MEQ	−0.0008	1.975	3.9	0.069	0.172
right claustrum ALFF ~ ineffability	−0.0008	3.287	10.8	0.006	0.412
left insula ALFF ~ overall strength of drug effect	−2.67e-05	0.077	0.006	0.939	−0.076
left insula ALFF ~ brief total MEQ	−0.0002	0.660	0.436	0.521	−0.042
left insula ALFF ~ ineffability	−3.89e-05	0.172	0.029	0.866	−0.075
right insula ALFF ~ overall strength of drug effect	7.17e-05	0.342	0.117	0.738	−0.067
right insula ALFF ~ brief total MEQ	−4.49e-05	0.241	0.058	0.813	−0.072
right insula ALFF ~ ineffability	1.15e-06	0.008	7.03e-05	0.993	−0.077
left putamen ALFF ~ overall strength of drug effect	−9.03e-05	0.477	0.227	0.642	−0.058
left putamen ALFF ~ brief total MEQ	−1.78e-05	0.105	0.011	0.918	−0.076
left putamen ALFF ~ ineffability	3.38e-05	0.271	0.073	0.791	−0.071
right putamen ALFF ~ overall strength of drug effect	−0.0003	1.137	1.29	0.276	0.020
right putamen ALFF ~ brief total MEQ	−0.0002	0.829	0.687	0.422	−0.023
right putamen ALFF ~ ineffability	−0.0002	1.126	1.27	0.280	0.019