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| Months since vaccination | Odds ratio | 95% confidence interval LL | 95% confidence interval UL | p-value | Positive/negative results |
|---|---|---|---|---|---|
| 12 months | 4.1 | 1.9 | 4.9 | 0.0003 | 48/405 |
| 8 months | 6.9 | 3.2 | 15.4 | 0.0000 | 65/376 |
| 4 months | 33.9 | 10.8 | 107.7 | 0.0000 | 120/334 |
