Fig. 3.

Association of amyloid positivity with youthful brain metabolism. Correlations to the youthful pattern of GI, FDG, oxygen metabolism, and CBF were measured for each individual PET session (Fig. 1). In this analysis, only the 313 sessions in cognitively unimpaired individuals were included. Among these individuals, known amyloid positivity (yellow dots) was associated with relatively preserved youthful GI as compared to other adults, adjusting for age and sex. This was not true for CMRGlc, CMRO₂ nor CBF. Blue dots reflect amyloid negativity or unknown status (presumed negative).