Table 1.
Prevalence estimates for SARS-CoV-2 and serology stratified by participant risk factors (N= 525 supermarket workers)a
| Characteristics | No. participants | SARS-CoV-2 prevalence 95% CI | P value | Seroprevalenceb 95% CI | P value |
|---|---|---|---|---|---|
| Overall | 525 | 21.0% (17.7–24.7) | 38.1% (34.0–42.3) | ||
| Age group (years) | 0.709 | 0.376 | |||
| 20–30 | 50 | 22.0% (12.6–35.5) | 36.0% (24.0–50.0) | ||
| 31–40 | 150 | 18.0% (12.6–25.0) | 32.7% (25.6–40.6) | ||
| 41–50 | 171 | 21.1% (15.6–27.8) | 40.9% (33.8–48.5) | ||
| >50 | 154 | 23.4% (17.3–30.7) | 40.9% (33.4–48.9) | ||
| Hypertension | 0.261 | 0.648 | |||
| Yes | 69 | 26.1% (17.1–37.7) | 40.6% (29.7–52.5) | ||
| No | 456 | 20.2% (16.7–24.1) | 37.7% (33.4–42.3) | ||
| Diabetes | 0.293 | 0.481 | |||
| Yes | 70 | 25.7% (16.8–37.2) | 34.3% (24.1–46.1) | ||
| No | 455 | 20.2% (16.8–24.2) | 38.7% (34.3–43.3) | ||
| Lung condition | 0.581 | 0.488 | |||
| Yes | 15 | 26.7% (10.4–53.4) | 46.7% (24.0–70.7) | ||
| No | 552 | 20.8% (17.5–24.5) | 37.8% (33.7–42.1) | ||
| Other conditions | 0.464 | 0.093 | |||
| Yes | 9 | 11.1% (1.5–50.1) | 11.1% (1.53–50.1) | ||
| No | 516 | 21.1% (17.8–24.9) | 38.6% (34.5–42.9) | ||
| Smoker | 0.040 | <0.001 | |||
| Yes | 207 | 16.4% (12.0–22.1) | 28.0% (22.3–34.5) | ||
| No | 318 | 24.0% (19.5–29.0) | 44.7% (39.3–50.2) |
a P values are based on chi-square test of the differences in risk factors and prevalence measures. These P values are not adjusted for the dependence of responses within supermarket locations.
bSeroprevalence defined as either a positive IgM or IgG rapid SARS-CoV-2 antibody test.