Table 2. Characteristics of COVID-19 cases with a re-positive PCR test and symptomatic cases with a negative PCR test (n = 50).
| Characteristics | Re-positive test |
P… | Negative test with COVID-19 symptoms |
P… | ||
|---|---|---|---|---|---|---|
| No n(%) |
Yes n(%) |
No n(%) |
Yes n(%) |
|||
| Demographics | ||||||
| Age | ||||||
| < 45 | 26 (65) | 3 (30) | 0.10 | 28 (66.7) | 1 (12.5) | 0.01 |
| 45–64 | 8 (20) | 5 (50) | - | 8 (19) | 5 (62.5) | - |
| 65+ | 6 (15) | 2 (20) | - | 6 (14.3) | 2 (25) | - |
| Sex | ||||||
| Male | 23 (57) | 4 (40) | 0.32 | 24 (57.1) | 3 (37.5) | 0.31 |
| Female | 17 (43) | 6 (60) | - | 18 (42.9) | 5 (62.5) | - |
| Nationality | ||||||
| Vietnamese | 25 (63) | 7 (70) | 0.66 | 27 (64.3) | 5 (62.5) | 0.92 |
| Other | 15 (38) | 3 (30) | - | 15 (35.7) | 3 (37.5) | - |
| Pre-existing condition | ||||||
| Yes | 7 (18.5) | 5 (50) | 0.03 | 9 (21.4) | 3 (37.5) | 0.33 |
| No | 33 (82.5) | 5 (50) | - | 33 (78.6) | 5 (62.5) | - |
| Disease characteristics | ||||||
| Symptoms at onset | ||||||
| Cough | 23 (57.5) | 5 (50) | – | 23 (54.8) | 5 (62.5) | – |
| Fever | 7 (17.5) | 3 (30) | - | 7 (16.7) | 3 (37.5) | - |
| Headache | 4 (10) | 0 (0) | - | 4 (9.5) | 0 (0) | - |
| Fatigue | 4 (10) | 0 (0) | - | 4 (9.5) | 0 (0) | - |
| Sputum production | 3 (7.5) | 2 (20) | - | 3 (7.1) | 2 (25) | - |
| Sore throat | 2 (5) | 2 (20) | - | 3 (7.1) | 1 (12.5) | - |
| Chill | 0 (0) | 1 (10) | - | 0 (0) | 1 (12.5) | - |
| Nasal congestion | 0 (0) | 1 (10) | - | 1 (2.4) | 0 (0) | - |
| Diarrhoea | 0 (0) | 1 (10) | - | 0 (0) | 1 (12.5) | - |
| Number of symptoms during infection | ||||||
| 1–2 | 24 (60) | 6 (60) | 1 | 26 (61.9) | 4 (50) | 0.53 |
| > 2 | 16 (40) | 4 (40) | - | 16 (38.1) | 4 (50) | - |
| Patient category | ||||||
| Pre-symptomatic | 15 (38) | 4 (40) | 0.66 | 15 (35.7) | 4 (50) | 0.3 |
| Symptomatic | 16 (40) | 5 (50) | - | 17 (40.5) | 4 (50) | - |
| Asymptomatic | 9 (23) | 1(10) | - | 10 (23.8) | 0 (0) | - |
| Severity | ||||||
| Asymptomatic | 9 (23) | 1 (10) | 0.009 | 10 (23.8) | 0 (0) | < 0.001 |
| Mild | 28 (70) | 4 (40) | - | 29 (69) | 3 (37.5) | - |
| Severe | 2 (5) | 2 (20) | - | 2 (4.8) | 2 (25) | - |
| Critical | 1 (3) | 3 (30) | - | 1 (2.4) | 3 (37.5) | - |
… Groups were compared using Pearson’s χ2 or Fisher’s exact test.