Table 1 Descriptive results per cluster (a) and results of cross-validation to test robustness of the clusters’ centers (b).

From: Gait classification for growing children with Duchenne muscular dystrophy

a

Cluster one

Cluster two

Cluster three

GCs (n)

181

59

190

Measurements (n)

91

17

45

Participants (n)

24

6

13

b

Reference membership

GCs in cluster one (n)

GCs in cluster two (n)

GCs in Cluster three (n)

Test membership: GCs in cluster one (n)

180

2

4

Test membership: GCs in cluster two (n)

1

27

0

Test membership: GCs in cluster three (n)

0

30

186

Sensitivity (%)

99.5%

45.8%

97.9%

Specificity (%)

97.6%

99.7%

87.5%

Misclassification rate (%) = 8.6%

  1. Number of GCs, measurements, and participants per cluster are given in (a). Confusion matrix between reference (i.e., cluster membership based on full dataset) and test memberships (i.e., predicted cluster membership after the 30-fold cross-validation) of the GCs with the sensitivity and specificity per cluster and overall misclassification rate are given in (b).
  2. Abbreviations in alphabetic order: GCs = gait cycles; n = number.
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