Timeliness of vaccinations in the Safety Monitoring of Adverse Reactions to Tdap Vaccine in Pregnancy (SMART VIP) cohort and the non-study Canterbury infant population
| Total (n) | On-time (n) | Overdue (n) | Overdue (%) | Risk ratio (95% CI) | p Value | |
|---|---|---|---|---|---|---|
| 6 weeks | ||||||
| Non-study | 5776 | 5374 | 402 | 7.1 | 1 | |
| SMART VIP cohort | 403 | 394 | 9 | 2.2 | 0.32 (0.17 to 0.62) | <0.0001 |
| 3 months | ||||||
| Non-study | 5781 | 5082 | 699 | 12.1 | 1 | |
| SMART VIP cohort | 398 | 392 | 6 | 1.5 | 0.12 (0.06 to 0.28) | <0.0001 |
| 5 months | ||||||
| Non-study | 5781 | 4764 | 1017 | 17.6 | 1 | |
| SMART VIP cohort | 398 | 375 | 23 | 5.8 | 0.33 (0.22 to 0.49) | <0.0001 |