Table 3.
Results of unadjusted Bernoulli analyses for space–time clustering within Atlanta (ATL) and Tampa/St. Petersburg (TAM) of adverse events associated with canine rabies vaccination during a 24-month period (2002/01–2003/12)
| City | Coordinates for most likely clustera | Radius (km) for most likely cluster | Time year/month (number of month) for most likely cluster | Observed/expected ratio | LLRb | P-value |
|---|---|---|---|---|---|---|
| ATL | 33.833355 N | 23.26 | 2002/11–2003/02 (4) | 20/3.82 = 5.24 | 18.28 | 0.002 |
| 84.618385 W | ||||||
| TAM | 27.509394 N | 28.39 | 2003/09–12 (4) | 12/1.93 = 6.23 | 12.64 | 0.129 |
| 82.718132 W | ||||||
Case and non-case data coordinates were based on geocoded addresses for individual dogs. Scan window was ≤25% of the geographic area and ≤25% of the study period.
There were no other statistically significant clusters identified.
LLR: log likelihood ratio statistic.