Table 2.
Support for geographical clusteringa
| Type and/or city | No. of sequences (N) | DNA |
Protein |
P (BaTS) | ||
|---|---|---|---|---|---|---|
| S | E | S | E | |||
| 2a | 65 | 20 | 0.2 | 10 | 0.04 | |
| 2b | 85 | 30 | 0.54 | 14 | 0.02 | |
| Birmingham | 12 | 11 | 0.86 | 5 | 0.3 | 1 |
| Stoke | 12 | 8 | 0.8 | 5 | 0.04 | 0.04 |
| Leicester | 7 | 5 | 0.64 | 4 | 0.37 | 1 |
| New Cross | 7 | 5 | 0.64 | 3 | 0.33 | 1 |
| Bow | 10 | 6 | 0.45 | 4 | 0.19 | 0.03 |
| Coventry | 9 | 4 | 0.33 | 4 | 0.33 | 0.05 |
| Cardiff | 6 | 3 | 0.33 | 3 | 0.33 | 1 |
| Huyton | 12 | 3 | 0.12 | 3 | 0.12 | 0.06 |
| Everton | 26 | 7 | 0.1 | 3 | 0.08 | 0.01 |
a
Simpson's index of diversity, where S is the number of different sequence types and E is the equitability index (where 1 is maximum diversity). This is shown for CPV types 2a and 2b and for hospitals with more than five sequences. P values calculated by BaTS (significant at <0.05), suggesting correlation between phylogeny and PDSA origin, are also indicated.