Table 1 Sample characteristics for each period. Note: Values are frequency counts (percentage) unless specified
Delta (3rd June–1st Sept 2021) | Delta (1st Sept–27th Nov 2021) | Omicron (13th Dec–2nd Feb 2022) | |||||||
|---|---|---|---|---|---|---|---|---|---|
All residents | Negative test | Influenza vaccinated | All residents | Negative test | Influenza vaccinated | All residents | Negative test | Influenza vaccinated | |
Number of individuals [n] | 2,722,708 | 321,676 | 937,054 | 2,716,029 | 376,864 | 932,416 | 2,708,637 | 445,427 | 906,193 |
Registered positive test | 3.4% | 4.6% | 2.2% | 4.3% | 5.7% | 4.4% | 10.5% | 17.4% | 9.7% |
Explanatory variables | |||||||||
Vaccination status | |||||||||
Unvaccinated | 47.2% | 35.7% | 23.5% | 36.0% | 21.1% | 22.0% | 31.8% | 19.7% | 22.4% |
1 dose | 16.2% | 18.1% | 9.8% | 6.5% | 7.6% | 1.2% | 5.3% | 5.6% | 3.7% |
2 doses | 36.5% | 46.0% | 66.4% | 57.3% | 71.0% | 76.5% | 32.8% | 35.9% | 16.4% |
3 doses | 0.2% | 0.3% | 0.2% | 0.2% | 0.4% | 0.3% | 30.1% | 38.9% | 57.5% |
Previous infection | 6.4% | 9.4% | 5.4% | 9.2% | 13.1% | 7.1% | 14.0% | 16.1% | 12.6% |
Deprivation Score [mean (sd)] | 28.8 (20.9) | 25.7 (19.6) | 25.1 (19.7) | 28.8 (20.9) | 25.7 (19.7) | 25.0 (19.7) | 28.8 (20.9) | 25.2 (19.5) | 25.1 (19.7) |
Covariates | |||||||||
Age [mean (sd)] | 41.7 (23.5) | 43.1 (22.4) | 53.1 (26.7) | 41.6 (23.5) | 43.8 (21.0) | 53.0 (26.6) | 41.5 (23.4) | 43.0 (22.0) | 50.5 (27.5) |
Sex | |||||||||
Female | 50.2% | 59.2% | 54.3% | 50.2% | 57.0% | 54.4% | 50.2% | 57.1% | 54.3% |
Male | 49.8% | 40.8% | 45.7% | 49.8% | 43.0% | 45.6% | 49.8% | 42.9% | 45.7% |
Ethnic group | |||||||||
White | 73.2% | 78.4% | 82.8% | 73.2% | 77.1% | 82.7% | 73.1% | 77.5% | 82.0% |
Asian or Asian British | 1.4% | 1.0% | 1.0% | 1.4% | 1.0% | 1.0% | 1.4% | 1.1% | 1.1% |
Black or Black British | 0.7% | 0.6% | 0.5% | 0.7% | 0.6% | 0.5% | 0.7% | 0.6% | 0.5% |
Mixed ethnicity | 1.7% | 1.7% | 1.3% | 1.7% | 1.6% | 1.3% | 1.7% | 1.6% | 1.4% |
Prefer not to say/Missing | 8.2% | 5.0% | 2.6% | 8.2% | 6.0% | 2.6% | 8.2% | 5.8% | 2.7% |
Other ethnicity | 14.8% | 13.3% | 11.9% | 14.8% | 13.6% | 11.9% | 14.8% | 13.4% | 12.4% |
Registered health issue | 51.1% | 59.3% | 64.8% | 51.0% | 56.6% | 64.7% | 51.0% | 57.7% | 63.4% |