Table 2. Summary Statistics of the Linear Models: on All Subjects for whom GABA, Genotypes, and Covariates Were Measured (n=150); on Those Who Were Not on Psychotropic Medication (n=147); and for the Analysis Including Only Covariates that Correlated with GABA (n=150).

	N	β	SE	95% CI	t-statistic	P-value
All subjects	150	−0.225	0.082	−0.39 to −0.07	−2.76	0.0066
No psychotropic medication	147	−0.234	0.082	−0.40 to −0.07	−2.85	0.0051
Only relevant covariates	150	−0.245	0.081	−0.40 to −0.09	−3.01	0.0031

Abbreviations: β, standardized regression coefficient; SE, standard error; 95% CI, 95% confidence interval.