Table 2 Fixed and random effects and residual standard deviation σ of Bayesian linear mixed effects model of association between age and GABA+/Cr, adjusted for voxel gray matter fraction (fGM).
Parameter | β | Est. Error | 95% CrI | \(\hat{R}\) | Bulk ESS | Tail ESS |
|---|---|---|---|---|---|---|
Fixed Effects | ||||||
Age | 0.07 | 0.22 | −0.40, 0.54 | 1.00 | 6155 | 4753 |
fGM | 0.07 | 0.17 | −0.27, 0.41 | 1.00 | 7243 | 4978 |
Random Effects | ||||||
σIntercept | 0.18 | 0.19 | 0.00, 0.71 | 1.00 | 6708 | 5934 |
σAge | 0.35 | 0.28 | 0.02, 1.09 | 1.00 | 5324 | 5348 |
σfGM | 0.20 | 0.20 | 0.01, 0.76 | 1.00 | 7153 | 7036 |
ρIntercept, Age | −0.00 | 0.51 | −0.89, 0.88 | 1.00 | 10,216 | 7991 |
ρIntercept, fGM | 0.01 | 0.51 | −0.89, 0.89 | 1.00 | 12,929 | 8762 |
ρAge,fGM | 0.10 | 0.50 | −0.84, 0.91 | 1.00 | 12,654 | 14,004 |
Residual Standard Deviation | ||||||
σ | 1.00 | 0.08 | 0.87, 1.16 | 1.00 | 17,365 | 12,983 |
