approaching significanceP =0.0539
Lastly, the index of perivascular adrenergic nerve density (as measured by % vascular area tyrosine hydroxylase) was less in 2A ( P =0.0030; Figure 2H ) and 3A ( P =0.0043; Figure 2H ) versus 1A arteries, with the difference between 2A and 3A arteries approaching significance ( P =0.0539).