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Table 4 Similaritya of baseline clusters to the 3, 6, 9 & 12 months clusters

From: Phenotyping of difficult asthma using longitudinal physiological and biomarker measurements reveals significant differences in stability between clusters

Baseline Cluster (n)

3 months Cluster Similarity (n)

6 months Cluster Similarity (n)

9 months Cluster Similarity (n)

12 months Cluster Similarity (n)

A (15)

A

0.30 (6)

A

0.39 (6)

A

0.38 (7)

A

0.40 (8)

A

B

0.05 (1)

B

0.00 (0)

B

0.05 (1)

B

0.00 (0)

A

C

0.05 (1)

C

0.08 (2)

C

0.04 (1)

C

0.08 (2)

A

D

0.35 (7)

D

0.20 (7)

D

0.19 (6)

D

0.15 (5)

B (17)

A

0.10 (2)

A

0.05 (1)

A

0.06 (1)

A

0.05 (1)

B

B

0.73 (15)

B

0.91 (15)

B

0.82 (16)

B

0.97 (16)

B

C

0.00 (0)

C

0.00 (0)

C

0.00 (0)

C

0.00 (0)

B

D

0.00 (0)

D

0.03 (1)

D

0.00 (0)

D

0.00 (0)

C (39)

A

0.28 (9)

A

0.10 (3)

A

0.07 (2)

A

0.19 (6)

C

B

0.13 (4)

B

0.00 (0)

B

0.07 (2)

B

0.00 (0)

C

C

0.72 (23)

C

0.89 (33)

C

0.86 (33)

C

0.81 (29)

C

D

0.07 (3)

D

0.07 (3)

D

0.04 (2)

D

0.09 (4)

D (54)

A

0.20 (8)

A

0.27 (10)

A

0.14 (5)

A

0.25 (10)

D

B

0.10 (4)

B

0.03 (1)

B

0.08 (3)

B

0.00 (0)

D

C

0.03 (1)

C

0.00 (0)

C

0.09 (4)

C

0.05 (2)

D

D

0.78 (41)

D

0.80 (43)

D

0.81 (42)

D

0.80 (42)

  1. aSimilarity indices between two clusters were calculated using Sorensen’s Index, as SI = 2ab/(a + b), where a is the number of subjects found in cluster A; b is the number of subjects in cluster B and ab is the number of subjects shared by both the cluster