Table 2.

Post hoc analysis of (a) GSH and (b) susceptibility after adjustment of age

Group comparison	Mean difference	S.E. of difference	t-statistic	P-value
(a) GSH conc.
Alzheimer’s disease versus HO	–0.592	0.108	–5.472	<0.001
Alzheimer’s disease versus MCI	–0.232	0.129	–1.789	0.074
HO versus MCI	0.36	0.130	2.765	0.006
(b) Susceptibility
Alzheimer’s disease versus HO	0.006	0.003	2.277	0.023
Alzheimer’s disease versus MCI	0.007	0.003	2.460	0.013
HO versus MCI	0.001	0.003	0.353	0.724

Based on estimated marginal means.