Table 2.
Association of participating blood donors’ characteristics with seroprevalence of anti-SARS-CoV-2 antibodies, Saudi Arabia, 20–25 May 2020.
| Characteristic | Category | Number of participants | Seroprevalence (%) | OR | 95% CI | p* |
|---|---|---|---|---|---|---|
| Citizenship status | Citizen | 605 | 0.3 | 1.00 | Ref. | – |
| Non-citizen | 231 | 4.3 | 13.64 | 2.96−62.75 | 0.001 | |
| Education level | Higher education | 540 | 0.3 | 1.00 | Ref. | – |
| Secondary education | 218 | 4.3 | 6.81 | 1.79−25.95 | 0.005 | |
| Lower education | 75 | 1.3 | 2.41 | 0.24−23.55 | 0.447 | |
| Directorate of health affairs | Makkah | 86 | 8.1 | 1.00 | Ref. | – |
| Madinah | 73 | 4.1 | 0.48 | 0.12−1.94 | 0.306 | |
| Jeddah | 43 | 2.3 | 0.27 | 0.31−2.25 | 0.226 | |
| Qassim | 34 | 2.9 | 0.34 | 0.04−2.89 | 0.324 |
Abbreviations: CI = confidence interval; OR = odds ratio; p = p-value; Ref. = reference; SARS-CoV-2 = severe acute respiratory syndrome coronavirus 2.
*
5% significance level. Differences are relative to the variable listed first as a reference in each characteristic.