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. Author manuscript; available in PMC: 2023 May 9.
Published in final edited form as: Med Image Anal. 2022 Aug 27;82:102571. doi: 10.1016/j.media.2022.102571

Table 8.

Ablation studies on the number of clusters used in k-means clustering.

Number of clusters NC vs. AD sMCI vs. pMCI
N km BACC SC RVRC BACC SC RVRC
{N/20,N/40,N/80} 81.8 0.77 102.1 70.7 0.78 103.1
{N/10,N/20,N/40} 82.2 0.82 104.2 70.8 0.84 105.8
{N/5,N/10,N/20} 82.1 0.87 106.5 71.1 0.88 108.2

The highest scores are in bold. N refers to the number of subjects, i.e., N=304 for NC vs. AD and N=328 for sMCI vs. pMCI.

Significantly lower scores (p<0.05, DeLong’s test for BACC, and paired two-tailed t-test for SC and RVRC) than the default setting, i.e., Nkm={N/5,N/10,N/20}.