Table 1.
Characteristics of SARS-CoV-2-Infected Symptomatic and Asymptomatic Persons in San Francisco Long-Term Care Facilities
| Characteristic | Total, No. (%) | Symptomatic, No. (%) N = 63 (34.2) |
Asymptomatic, No. (%) N = 121 (65.7) |
||
|---|---|---|---|---|---|
| HCW | Residents | HCW | Residents | ||
| SARS-CoV-2 infected | 184 | 31 (49.2) | 32 (50.8) | 45 (37.2) | 76 (62.8) |
| Age, median y (range) | 71.0 (21–99) | 54.0 (23–77) | 85.0 (57–98) | 48.0 (21–72) | 79.0 (47–99) |
| Hospitalizeda,b | 30/183 (16.4) | 0 | 24 (75.0) | 0 | 6/75 (8.0) |
| Diedb | 14 (7.6) | 0 | 10 (31.3) | 0 | 4 (5.3) |
| Tested at SFPHLc | 106 (57.6) | 11 (17.4) | 95 (78.5) | ||
| RT-PCR cycle threshold, median (range)d | 16.4 (3.0–29.7) | 11.5 (3.0–21.8) | 16.7 (3.3–29.7) | ||
Note. HCW, healthcare worker; SFPHL, San Francisco Public Health Laboratory; RT-PCR, reverse-transcription polymerase chain reaction.
Includes patients with known information only; when incomplete information available, the denominator is noted.
Hospitalization or death due to COVID-19 as recorded in the medical record or death certificate, as appropriate.
Testing of oropharyngeal or nasopharyngeal swabs was performed with the RealTime SARS CoV-2 molecular amplification assay using the Abbott m2000 platform. Cycle threshold values below 30.5 indicate a positive result.
Cycle threshold values for symptomatic persons were excluded if the time from symptom onset to specimen collection was ≥10 days or if persons tested positive prior to symptom onset.