Table 1.
Principal characteristics of participants contributing to Panbio rapid antigen test-reverse transcription-polymerase chain reaction (RT-PCR) test pairs (Means and SD or percentage and N)
| Total (1060) | Female (597) | Male (463) | |
|---|---|---|---|
| Age | 47 (16) | 47 (16) | 46 (17) |
| Days of symptoms | 6 (8) | 6 (10) | 6 (5) |
| Asymptomatic subjects | 14% (145) | 14% (84) | 13% (61) |
| Fever | 33% (350) | 28% (169) | 39% (181) |
| Dry cough | 37% (391) | 38% (225) | 36% (166) |
| Cough and phlegm | 11% (114) | 10% (58) | 12% (56) |
| Phlegm | 9% (98) | 10% (58) | 9% (40) |
| Dyspnea | 24% (261) | 22% (132) | 28% (129) |
| Any comorbidity | 46% (485) | 46% (272) | 46% (213) |
| Diabetes | 14% (148) | 14% (81) | 14% (67) |
| Hypertension | 18% (195) | 19% (115) | 17% (80) |
| Obesity | 10% (102) | 10% (58) | 10% (44) |
| Any cancer | 10% (101) | 10% (62) | 8% (39) |
| Previous smoking | 27% (284) | 20% (121) | 35% (163) |
| Current tobacco smoker | 10% (107) | 7% (43) | 14% (64) |
| Former smoker | 18% (178) | 14% (79) | 25% (99) |
| Cigarettes per day in smokers | 4(4) | 3(3) | 5(5) |
| Influenza vaccine 2020-2021 | 49% (515) | 51% (304) | 46% (211) |
| COVID vaccine | 5% (49) | 5% (28) | 5% (21) |
| SpO2% | 90(10) | 91(10) | 89(10) |
| Breathing frequency | 21(6) | 21(5) | 22 (7) |
| Oxygen use in the moment of the test | 18% (190) | 13% (79) | 24% (111) |
| Site of recruitment | |||
| Emergency room visit | 57% (601) | 59% (350) | 54% (251) |
| Outpatient clinic | 35% (366) | 34% (202) | 35% (164) |
| Hospitalized | 9% (93) | 8% (45) | 10% (48) |
| Follow-up | |||
| Remained ambulatory | 79% (847) | 84% (449) | 75% (348) |
| Re-admission to hospital | 1% (15) | 2% (9) | 1% (6) |
| Positive RT-PCR test | 45% (472) | 41% (247) | 49% (225) |
Percentage (%) or mean (standard deviation) are shown.