Table 2.
Effectiveness of Full and Half dose of ChAdOx1 nCoV-19 in the Viana population.
| Parameters | Full dose (n = 6,402) | Half dose (n = 16,570) | ||||
|---|---|---|---|---|---|---|
| All Cases | ||||||
| Age Groups | Cases/person-day | Incidence (per 1,000 person-year) |
1-RR (%) | Cases/person-day | Incidence (per 1,000 person-year) |
1-RR (%) |
| 18–29 | 16/100,379 | 58.2 | 48.3 | 72/597,962 | 43.9 | 61.0 |
| 30–39 | 21/159,195 | 48.1 | 67.0 | 61/501,607 | 44.4 | 69.6 |
| 40–49 | 27/209,403 | 47.1 | 74.9 | 43/348,504 | 45.0 | 76.0 |
| All | 64/468,977 | 49.8 | 65.1 | 176/1,448,073 | 44.4 | 68.9 |
| Cases Confirmed by RT-PCR | ||||||
| Age Groups | Cases/person-day | Incidence (per 1,000 person-year) |
Cases/person-day | Incidence (per 1,000 person-year) |
||
| 18–29 | 6/100,379 | 21.8 | 43/597,962 | 26.2 | ||
| 30–39 | 11/159,195 | 25.2 | 31/501,607 | 22.6 | ||
| 40–49 | 16/209,403 | 27.9 | 20/348,504 | 20.9 | ||
| All | 33/468,977 | 25.7 | 94/1,448,073 | 23.7 | ||
| Model-based Analysis Group Coefficient |
- 0.09 (-0.49 to 0.31) | |||||
CrI, Credibility Interval; Full dose, ChAdOx1 Full dose group; Half dose, ChAdOx1 Half dose group.