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Table 3 Mean differences from multiple comparisons between clusters

From: Comprehensive assessment of alterations in hand deformities over 11 years in patients with rheumatoid arthritis using cluster analysis and analysis of covariance

   Cluster 2 Cluster 3 Cluster 4 Cluster 5
Swan-neck deformity cluster 1 − 0.395 −0.583 −1.501 − 10.600*
cluster 2   − 0.188 −1.106 − 10.205*
cluster 3    −0.918 −10.017*
cluster 4     −9.099*
Boutonnière deformity cluster 1 0.681 −2.824* −0.108 1.723*
cluster 2   −3.505* −0.789 1.043
cluster 3    2.716* 4.547*
cluster 4     1.832
Ulnar drift cluster 1 −1.295* −1.008 −3.565* 0.021
cluster 2   0.286 −2.271* 1.316
cluster 3    −2.557* 1.029
cluster 4     3.586*
Kapandji index cluster 1 0.242 0.647 7.832* 6.834*
cluster 2   0.405 7.590* 6.592*
cluster 3    7.185 6.187
cluster 4     −0.998
  1. The numbers express mean differences between clusters
  2. Multiple comparisons were performed with post-hoc Bonferroni. *: p < 0.05