| A) Confirmed COVID-19 (unvaccinated) | B) Confirmed COVID-19 (vaccinated) | C) Vaccinated |
---|---|---|---|
Study population | Age: 18-64 Norwegian residents No COVID-19 prior to January 1st, 2021 | Age: 18-64 Vaccinated with at least two doses Norwegian residents No COVID-19 prior to January 1st, 2021 | Age: 18-64 Norwegian residents No COVID-19 prior to January 1st, 2021 |
Inclusion criteria for treatment group | Confirmed COVID-19 cases between January 1st 2021 and August 1st 2021 | Confirmed COVID-19 cases at least 7 days after second vaccination dose between January 1st and September 1st 2021 | Ten percenta of the individuals among the 20-40 percentile that got the vaccine first in the age categories:18-24, 25-39, 40-44, 45-64 b |
Eligible for comparison group | The full study population, (except those in the treatment group) | The full study population (except those in the treatment group) | The full study population (except the vaccinated in the treatment group and the vaccinated among the 20 percentile) |
Excluded individuals and observations | Individuals who died, emigrated or were vaccinated before (hypothetical) treatment date were excluded entirely (C=10 421, T= 57). Individuals that died, emigrated, vaccinated or tested positive for COVID-19 after the treatment date were observed only until the date of this event (Person days: 123 678). | Individuals who died, emigrated or tested positive for COVID-19 before (hypothetical) treatment date (C=19, T=3). Individuals that died, emigrated, vaccinated or tested positive for COVID-19 after the treatment date were observed only until the date of this event (Person days: 154). | Individuals who died, emigrated or tested positive for COVID-19 before (hypothetical) treatment date (C=6 143, T= 770). Individuals that died, emigrated, vaccinated or tested positive for COVID-19 after the treatment date were observed only until the date of this event (Person days: 976 482). |