Performance characteristics of self-reported symptoms in relation to seropositivity at study enrolment
| Symptom | Number of participants experiencing symptom (n) | Participants experiencing symptoms (%) | Sensitivity (%) | Specificity (%) | Positive predictive value (%) | Negative predictive value (%) |
| Fatigue | 676 | 73.1 | 53.8 | 71.1 | 83.5 | 36.2 |
| Cough | 563 | 61.3 | 53.5 | 62.9 | 69.5 | 46.1 |
| Myalgia | 553 | 59.8 | 56.6 | 65.4 | 71.6 | 49.4 |
| Fever >37.8°C | 480 | 52.1 | 58.3 | 64.7 | 64.2 | 58.8 |
| Sore throat | 425 | 46.0 | 44.5 | 50.9 | 43.5 | 51.8 |
| Shortness of Bbeath | 387 | 41.3 | 55.0 | 59.1 | 48.6 | 65.1 |
| Anosmia | 306 | 33.6 | 82.0 | 70.4 | 58.4 | 88.6 |
| Diarrhoea | 217 | 23.5 | 57.6 | 55.8 | 28.6 | 81.1 |
| Cough or fever or anosmia | 752 | 78.6 | 54.3 | 83.3 | 92.3 | 33.1 |