Table 5.
Interrater agreement for self-reported brand by dose compared with the Québec Vaccination Registry for all participants whose emergency department index visit occurred between March 24, 2020, and December 25, 2021.
| Dose and self-reported vaccine brand | Québec Vaccination Registry vaccine brand, n | Cohen κa (95% CI) | |||||
|
|
Pfizer | Moderna | Astra Zeneca or Covishield | Johnson & Johnson |
|
||
| 1 | 0.80 (0.75-0.84) | ||||||
|
|
Pfizer | 645 | 19 | <5 | 0 |
|
|
|
|
Moderna | 11 | 137 | 0 | 0 |
|
|
|
|
AstraZeneca or Covishield | <5 | 0 | 38 | 0 |
|
|
|
|
Johnson & Johnson | 0 | 0 | 0 | <5 |
|
|
|
|
Unknown, but vaccinated | 29 | 6 | <5 | 0 |
|
|
| 2 | 0.76 (0.70-0.83) | ||||||
|
|
Pfizer | 386 | 19 | <5 | 0 |
|
|
|
|
Moderna | 5 | 84 | 0 | 0 |
|
|
|
|
AstraZeneca or Covishield | 0 | 0 | 9 | 0 |
|
|
|
|
Unknown, but vaccinated | 16 | 5 | 0 | 0 |
|
|
| 3 | 0.59 (0.34-0.83) | ||||||
|
|
Pfizer | 24 | <5 | 0 | 0 |
|
|
|
|
Moderna | <5 | 7 | 0 | 0 |
|
|
|
|
Unknown, but vaccinated | <5 | <5 | 0 | 0 |
|
|
aCohen κ calculated without participants who answered “Unknown, but vaccinated” were 0.89 (95% CI 0.86-0.93) for first dose, 0.85 (95% CI 0.80-0.91) for second dose, and 0.70 (95% CI 0.43-0.97) for third dose.