Edited Magnetic Resonance Spectroscopy Detects an Age-Related Decline in Nonhuman Primate Brain GABA Levels

Table 1

A general linear model uses both age and GM/VOI as independent variables for predicting GABA+ level (multiple regression analysis (), dependent variable: GABA+/creatine ratio).

Independent variables	Estimate	Std. error (S.E.)	value	Pr(>)
(Intercept)	0.1777298	0.0321091	5.535
Age	−0.0011562	0.0004191	−2.759	0.022156
GM/VOI	−0.1837662	0.0713761	−2.575	0.029960

Residual standard error: 0.008431 on 9 degrees of freedom.
Multiple -squared: 0.6062, adjusted -squared: 0.5187.
-statistic: 6.927 on 2 and 9 DF, value: 0.01509.