Table 1.
Case counts and estimated prevalences for COVID-19 and influenza coinfections from the Mayo Clinic EHR data.
| (a) Case counts of coinfections from COVID-19 cohort. | ||
|---|---|---|
| Cohort | Case count (%) | |
| All COVID-19 cases (confirmed by PCR test) | 197,364 (100.0%) | |
| COVID-19 cases with lab tests for influenza within +/− 14 days | 17,932 (9.1%) | |
| COVID-19 and influenza coinfection within +/− 14 days, with diagnosis of influenza confirmed by: | ||
| - Lab test | 103 (0.05%) | |
| - ICD-10 codes + manual review | 4 (0.00%) | |
| - Clinical notes + manual review | 13 (0.01%) | |
| - Any of the above | 120 (0.06%) | |
| (b) Case counts of coinfections from influenza cohort. | ||
| Cohort | Case count (%) | |
| All influenza cases during the study period (2020 January 1 to 2022 April 2) | 2,919 (100%) | |
| COVID-19 and influenza coinfection within +/− 14 days, with diagnosis of influenza confirmed by: | ||
| - Lab test | 103 (3.5%) | |
| c) Prevalence estimates. | ||
| Description | Cases/population | Prevalence (95% CI) |
| Estimated prevalence of COVID-19 and influenza coinfections from overall COVID-19 cohort | 120/197,364 | 0.061% [0.051%, 0.073%] |
| Estimated prevalence of COVID-19 and influenza coinfections from COVID-19 cohort with lab tests available | 103/17,932 | 0.574% [0.474%, 0.696%] |
| Estimated prevalence of COVID-19 and influenza coinfections from overall Influenza cohort | 103/2,919 | 3.53% [2.92%, 4.26%] |