TABLE 1. SARS-CoV-2 test status and cumulative incidence of SARS-CoV-2 infection, by housing location among orchard employees at a fruit grower (N = 3,013) — Okanogan County, Washington, May–August 2020.
| Measure | Residence no./total no. (%) | p-value | ||
|
Community housing
|
Farmworker housing
|
Total
|
||
| All testing | ||||
| Total employees with positive SARS-CoV-2 test results | 76/628 (12) | 102/2,385 (4) | 178/3,013 (6) | <0.001 |
| Total employees with positive SARS-CoV-2 test results or suspected COVID-19 | 88/628 (14) | 161/2,385 (7) | 249/3,013 (8) | <0.001 |
| Symptomatic testing (May–August 2020) | ||||
| Employees with positive test results during symptomatic testing (among all employees completing symptomatic testing)* | 72/100 (72) | 86/96 (90) | 158/196 (81) | 0.002 |
| Employees with positive test results during symptomatic testing (among total included employees) | 72/628 (11) | 86/2,385 (4) | 158/3,013 (5) | <0.001 |
| Employees with suspected COVID-19† | 12/628 (2) | 59/2,385 (2) | 71/3,013 (2) | 0.408 |
| Screening testing (August 2020) | ||||
| Employees with positive test results during screening testing§ | 4/552 (1) | 16/2,287 (1) | 20/2,839 (1) | 0.950 |
* An additional 16 employees were recorded as having been tested during symptomatic testing but did not have a test result recorded and were not listed as having a suspected case of COVID-19. Among these 16 employees, 14 were tested during screening testing. The other two employees, who never had a test result recorded, were excluded from analysis. All 16 employees were excluded from the calculation of percentage of positive test results during symptomatic testing.
† A suspected case was defined as the presence of symptoms compatible with COVID-19 in an employee who declined testing.
§ Employees who received negative test results during symptomatic testing or were considered to have suspected COVID-19 were tested during the screening testing. Employees who received positive test results during previous symptomatic testing were intended to be excluded from screening testing; however, five such employees were inadvertently retested and are excluded from this measure.