Table 4.
IRRs comparing fully vaccinated individuals with unvaccinated individuals by age at vaccination initiation in the screened population ages 23–29 years old
| Individuals, No. | CIN2+, No. | Person‐years | IR (95% CI)a | IRR (95% CI)2 | p values | |
|---|---|---|---|---|---|---|
| Unvaccinated | 602,882 | 4,765 | 1,623,109 | 294 (285;302) | Reference | Reference |
| Age at vaccination initiation | ||||||
| ≤16y | 298 | 0 | 93 | – | – | – |
| 17–19y | 5,227 | 1 | 4,669 | 21 (3;152) | 0.12 (0.02;0.85) | 0.033 |
| 20–29y | 6,665 | 32 | 13,221 | 242 (171;342) | 0.79 (0.56;1.12) | 0.183 |
a
Crude IRs reported per 100,000 person‐years.
IRRs reported were stratified on age at vaccination initiation, and adjusted for attained age, and parental education.