Seroprevalence of anti-SARS-CoV-2 antibodies by participant characteristics
| Characteristics | Tested | Seropositive | Seroprevalence | χ2 test |
| N | n | % | P value | |
| Age in years | ||||
| 14–19 | 192 | 7 | 3.7 | 0.19 |
| 20–24 | 588 | 42 | 7.1 | |
| 25–29 | 400 | 24 | 6.0 | |
| 30–34 | 210 | 9 | 4.3 | |
| ≥35 | 56 | 1 | 1.8 | |
| ANC | ||||
| Hiwot Fana Hospital | 695 | 35 | 5.0 | 0.260 |
| Haramaya Hospital | 19 | 0 | 0.0 | |
| Awoday Health Centre | 733 | 48 | 6.6 | |
| Residence | ||||
| Urban | 984 | 57 | 5.8 | 0.910 |
| Rural | 461 | 26 | 5.6 | |
| Number of children | ||||
| None | 520 | 32 | 5.8 | 0.370 |
| 1–5 | 778 | 45 | 5.5 | |
| 6–10 | 55 | 6 | 9.8 | |
| Trimester of visit | ||||
| First | 366 | 31 | 8.5 | 0.034 |
| Second | 658 | 32 | 4.9 | |
| Third | 423 | 20 | 4.8 | |
| Comorbidities | ||||
| None | 1439 | 81 | 5.6 | 0.019 |
| At least one* | 8 | 2 | 25.0 | |
| COVID symptoms† | ||||
| No | 1389 | 82 | 5.9 | 0.240 |
| Yes | 51 | 1 | 2.0 |
*Chronic liver, renal, cardiovascular or ‘other’ disease.
†At least one of cough, fever, headache or difficulty breathing.
ANC, antenatal clinic.