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Table 2 Median, interquartile range (IQR) and skewness of Aβ-positive voxels in clusters 1–4 across the diagnostic category

From: Boosting the diagnostic power of amyloid-β PET using a data-driven spatially informed classifier for decision support

  CN
Median (IQR)
EMCI
Median (IQR)
LMCI
Median (IQR)
AD
Median (IQR)
1 8126 (5163) 8666 (4682) 10393 (5218) 11685 (2986)
2 6107 (1652) 6229 (1543) 6631 (1292) 6780 (829)
3 7285 (6038) 8028 (5988) 10350 (7309) 12666 (4908)
4 2818 (5370) 3492 (6797) 8633 (9214) 11264 (5498)
  Skewness g1 Skewness g1 Skewness g1 Skewness g1
1 − 0.08 − 0.37 − 0.89 − 1.79
2 − 1.23 − 1.62 − 2.07 − 2.71
3 0.40 0.20 − 0.39 − 1.10
4 1.21 0.83 − 0.08 − 1.01