Table 2.
Eligibility of called potential CDC COVID-19 Vaccine Pregnancy Registry participants by manufacturer of first COVID-19 vaccine dose received, January 2021 – August 2022 (N = 65,076)*.
| Pfizer-BioNTech | Moderna | Janssen | Overall | |||||
|---|---|---|---|---|---|---|---|---|
| (N = 38,179) | (N = 24,660) | (N = 2,230) | (N = 65,076) | |||||
| n | (%) | n | (%) | n | (%) | n | (%) | |
| Unreachable | 23,093 | (35.5) | 14,409 | (22.1) | 1,446 | (2.2) | 38,955 | (59.9) |
| Reached | 15,086 | (23.5) | 10,251 | (15.7) | 784 | (1.2) | 26,121 | (40.1) |
| Refused participation | 761 | (5.0) | 467 | (4.6) | 29 | (3.7) | 1,257 | (4.8) |
| Not eligible** | 725 | (4.8) | 654 | (6.4) | 24 | (3.1) | 1,403 | (5.4) |
| Eligible | 13,600 | (90.1) | 9,130 | (89.1) | 731 | (93.2) | 23,461 | (89.8) |
| Declined enrollment | 63 | (0.5) | 45 | (0.5) | 7 | (1.0) | 115 | (0.5) |
| Eligible and enrolled | 13,537 | (99.5) | 9,085 | (99.5) | 724 | (99.0) | 23,339 | (99.5) |
| Withdrew | 28 | (0.4) | 26 | (0.3) | 5 | (0.7) | 59 | (0.3) |
| Lost to follow-up | 342 | (2.5) | 299 | (3.3) | 75 | (10.4) | 716 | (3.1) |
| Analytically ineligible*** | 44 | (0.3) | 45 | (0.5) | 1 | (0.1) | 90 | (0.4) |
| Total analytically eligible† | 13,491 | (99.7) | 9,035 | (99.5) | 723 | (99.9) | 23,249†† | (99.6) |
Potential participants called included those who were initially called by CDC or provided consent for contact in response to the Pregnancy Follow-up Survey (PFUS) to assess willingness to participate. Potential participants with unknown manufacturer of first dose (n = 7) were all unreachable and are included in the overall column, though there is no distinct column for participants with unknown manufacturer of first dose.
Includes reached potential participants who were ineligible based on timing of vaccination, did not provide enough information to determine eligibility, or spoke a language other than English or Spanish.
Deemed analytically ineligible based on gestational age at pregnancy outcome and date of outcome relative to timing of vaccination.
Analytically eligible is not mutally exclusive from participants who withdrew or were lost to follow-up, but excludes those who withdrew and requested data exclusion (n = 7) and those who were deemed analytically ineligible.
23,249 participants reported and contributed data on a total of 23,265 eligible pregnancies to the registry.