marginally non-significantP =0.058
For the medulla, TBV had a significant positive effect on volume ( F 1,26 =11.44, P =0.002), while the effect of age was marginally non-significant ( F 1,26 =3.93, P =0.058) and HCV had no significant effect ( F 1,26 =0.0010, P =0.975) ( Fig. 6A ).