- We only computed generalized estimating equations (GEE) for those associations that were significant when assessed with Spearman correlations (Table 1). Standardized beta (β) and p values from GEE analyses between [18F]flortaucipir BPND (partial volume corrected) or [11C]UCB-J and MEG spectral measures (relative delta, theta and alpha power; absolute broadband power; and peak frequency) are shown. In green, significantly positive associations are shown; in red, significantly negative associations are shown