TABLE 4.
Measures of congruency and diversity among subtyping tests for Salmonella Enteritidis
| Subtyping method | Adjusted Rand index |
Adjusted Wallace coefficient (95% confidence interval)a |
Simpson's reciprocal index (1/D) | ||||
|---|---|---|---|---|---|---|---|
| SNP-PCR | PFGE | Phage type | SNP-PCR | PFGE | Phage type | ||
| SNP-PCR | 0.566 (0.440–0.692) | 0.470 (0.307–0.632) | 12.17 | ||||
| PFGE | 0.210 | 0.129 (0.067–0.190) | 0.264 (0.081–0.447) | 3.54 | |||
| Phage type | 0.316 | 0.365 | 0.238 (0.123–0.353) | 0.588 (0.396–0.780) | 6.55 | ||
a
Wallace coefficient is the probability that two isolates grouped together when tested by A (e.g., SNP-PCR) will remain clustered when tested by B (e.g., PFGE).