Volume 28, Number 3—March 2022
Research
SARS-CoV-2 Period Seroprevalence and Related Factors, Hillsborough County, Florida, USA, October 2020–March 2021
, Shari Pilon-Thomas, Michael J. Schell, Martha Abrahamsen, Jessica Y. Islam, Kimberly Isaacs-Soriano, Kayoko Kennedy, Christopher W. Dukes, Junmin Whiting, Julie Rathwell, Jonathan A. Hensel, Leslie N. Mangual, Ernst Schonbrunn, Melissa Bikowitz, Dylan Grassie, and Yan Yang
Table 1
Factors associated with severe acute respiratory syndrome coronavirus 2 antibody prevalence among residents, univariate and multivariable models, Hillsborough County, Florida, USA, October 2020–March 2021*
| Characteristic | Unadjusted OR (95% CI) | Adjusted OR† (95% CI) |
|---|---|---|
| Age group, y | ||
| 18–44 | Referent | Referent |
| 45–54 | 0.88 (0.56–1.37) | 1.13 (0.64–1.98) |
| 55–64 | 0.71 (0.46–1.12) | 0.86 (0.48–1.55) |
| >65 |
0.71 (0.43–1.18) |
1.64 (0.80–3.35) |
| Sex | ||
| M | Referent | Referent |
| F |
0.95 (0.67–1.35) |
0.88 (0.57–1.38) |
| Marital status | ||
| Married or living together | Referent | Referent |
| Single, never married | 0.91 (0.60–1.37) | 1.05 (0.61–1.80) |
| Divorced, separated , or widowed |
0.49 (0.28–0.86) |
0.40 (0.20–0.77) |
| Living with chronic disease‡ |
0.88 (0.61–1.28) |
0.56 (0.34–0.93) |
| Essential worker status | ||
| Not essential worker | Referent | Referent |
| Hospital, clinic, grocery store, public services | 1.89 (1.26–2.84) | 2.40 (1.42–4.07) |
| Financial services, banking, or other |
0.91 (0.55–1.52) |
0.70 (0.37–1.31) |
| Mean hours/week interacting with virus-positive contact |
1.02 (1.01–1.02) |
1.01 (1.001–1.01) |
| Relationship to virus-positive contact | ||
| No known contact with virus-positive person | Referent | Referent |
| Family member | 8.79 (5.62–13.77) | 4.62 (2.49–8.58) |
| Friend or other | 5.52 (3.43–8.90) | 4.22 (2.44–7.30) |
| Co-worker |
2.89 (1.51–5.53) |
2.04 (0.95–4.40) |
| Does not avoid groups of people | 1.65 (1.12–2.43) | 1.71 (1.06–2.76) |
| Ever had coronavirus disease symptoms | 9.24 (6.33–13.48) | 9.14 (5.93–14.08) |
*Based on a 863-person sample size. The following variables were included in the backward selection modeling approach: age, sex, race, ethnicity, marital status, smoking status, living with chronic disease, lung problem, work environment during pandemic, practiced mask use since start of pandemic, practiced social distancing since start of pandemic, mean hours/week interacting with virus-positive contact, traveled out of state after February 2020, relationship to virus-positive contact, avoid groups of people, only going outside the home for essential trips, and ever had coronavirus disease symptoms. OR, odds ratio. †Results from the full model, which included all variables, listed in Appendix Table. ‡Including cancer, heart disease, diabetes, autoimmune disease, kidney disease, liver disease, and being immunosuppressed.