Table 3.

Average AChE activity with PMP PET

Region	Mean ± sd				P
	All subjects PMP	ET PMP	EPT PMP	No-HT PMP	EPT vs. no-HTa	ET vs. no-HTa	ET vs. EPTb	ANOVAc
n	50	13	21	16
Left hippocampus	0.047 ± 0.005	0.046 ± 0.006	0.049 ± 0.004	0.045 ± 0.005	0.048	0.954	0.121	0.036
Right hippocampus	0.043 ± 0.005	0.041 ± 0.006	0.045 ± 0.005	0.041 ± 0.005	0.073	1.000	0.123	0.041
Posterior cingulate	0.028 ± 0.002	0.027 ± 0.003	0.029 ± 0.002	0.027 ± 0.003	0.045	0.974	0.024	0.031
Reference region	0.034 ± 0.003	0.033 ± 0.005	0.035 ± 0.003	0.034 ± 0.002	0.430	0.872	0.086	0.205

PMP measure is k₃ (min⁻¹).

^aTukey honestly significant difference post hoc test.

^bANCOVA controlling for years on HT.

^cANOVA comparison between all three treatment groups.