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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Neurobiol Aging. 2014 Oct 7;36(0 1):S167–S177. doi: 10.1016/j.neurobiolaging.2014.05.039

Table 6.

12-month effect sizes for brain change. Mean % tissue atrophy over the interval, standard deviation (SD) of the atrophy (also in %), and n80 [with 95% confidence interval] for each of the two numerical summaries, and for both accelerated and nonaccelerated images across all 4 diagnostic groups (AD, EMCI, LMCI and CN). As expected, the change in the statistical ROI is higher than that detected in the overall temporal lobe ROI, as it focuses on voxels expected to change the most.

AD Accel Stat ROI
p<0.00001
NonAccel Stat ROI
p<0.00001
Accel Temporal
ROI
NonAccel Temporal
ROI
% Tissue
Atrophy
1.72 1.63 0.46 0.57
SD 1.20 0.99 0.78 0.65
n80 [CI] 123 [49, 445] 92 [46, 216] 710 [157, 40340] 323 [107, 3117]
LMCI Accel Stat ROI
p<0.00001
NonAccel Stat ROI
p<0.00001
Accel Temporal
ROI
NonAccel Temporal
ROI
% Tissue
Atrophy
1.29 1.41 0.45 0.43
SD 1.20 1.21 0.77 0.83
n80 [CI] 220 [119, 471] 186 [104, 391] 720 [305, 2896] 951 [335, 11061]
EMCI Accel Stat ROI
p<0.00001
NonAccel Stat ROI
p<0.00001
Accel Temporal
ROI
NonAccel Temporal
ROI
% Tissue
Atrophy
0.73 0.88 0.23 0.29
SD 0.94 1.06 0.72 0.81
n80 [CI] 420 [251, 892] 366 [222, 715] 2399 [630, 269830] 1896 [543, 88109]
CN Accel Stat ROI
p<0.00001
NonAccel Stat ROI
p<0.00001
Accel Temporal
ROI
NonAccel Temporal
ROI
% Tissue
Atrophy
0.59 0.74 0.09 0.22
SD 0.80 0.68 0.61 0.58
n80 [CI] 468 [223, 1542] 217 [126, 576] 11358 [1400, 6887100] 1768 [614, 20580]