Table 1.
Observed and Adjusted Seroprevalences in the Different Demographic Groups of the Study Population
| Demographic Group | Population Size | Samples, No | Seroprevalence, Mean (95% CI), % | COVID-19– Related Deaths, No. | IFR, % | |
|---|---|---|---|---|---|---|
| Unadjusted | Adjusted | |||||
| Sex | ||||||
| Male | 459 189 | 3092 | 9.06 (8.07–10.12) | 6.49 (.16–17.67) | 606 | NA |
| Female | 494 556 | 3543 | 6.72 (5.92–7.59) | 4.23 (.13–13.14) | 627 | NA |
| Care type | ||||||
| Primary | NA | 2531 | 5.69 (4.82–6.66) | 2.95 (.10–8.23) | NA | NA |
| Secondary | NA | 4104 | 9.11 (8.25–10.04) | 6.73 (.21–17.44) | NA | NA |
| Age group, y | ||||||
| 18–44 | 455 739 | 1662 | 5.05 (4.05–6.22) | 3.10 (.10–9.05) | 8 | 0.06 |
| 45–64 | 310 813 | 2202 | 9.36 (8.17–10.65) | 6.67 (.16–17.84) | 103 | 0.50 |
| 65–74 | 106 435 | 1244 | 7.48 (6.08–9.08) | 5.18 (.15–13.98) | 164 | 2.97 |
| >75 | 80 758 | 1527 | 8.84 (7.46–10.38) | 5.78 (.17–14.96) | 958 | 20.52 |
| Overall | 953 745 | 6635 | 7.81 (7.17–8.48) | 5.29 (.13–15.10) | 1233 | NA |
Abbreviations: CI, confidence interval; COVID-19, coronavirus disease 2019; IFR, infection fatality rate; NA, not available.