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