Table 4 K-Means clustering method.

From: Theoretical discrimination index of postural instability in amyotrophic lateral sclerosis

Cluster means

Cluster

Postural instability

APAamplitude (mm)

Braking index (%)

1

0

45.445855

16.5675477

2

1

24.736571

6.35800396

3

0

48.342983

61.8215083

  1. K cluster = 3, CCC best = 4.82779, Step = 5
  2. Eigenvalues 2.996682, 0.5347658, 0.4685522, 0
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