Table 1 Patient characteristics for the entire cohort and by RT-PCR result subgroup (categorical data)
|  | Total (n = 9081) | Positive (n = 2084) | Negative (n = 6997) | p-value |
|---|---|---|---|---|
N (%) | N (%) | N (%) | ||
Symptomatic | 6871 (75.7) | 1993 (95.6) | 4878 (69.7) |  < 0.001 |
Age (yrs) | Â | Â | Â | 0.185 |
 18–39 | 3961 (43.6) | 867 (41.6) | 3094 (44.2) |  |
 40–64 | 4226 (46.5) | 1011 (48.5) | 3215 (46.0) |  |
 65–74 | 554 (6.1) | 127 (6.1) | 427 (6.1) |  |
  ≥ 75 | 340 (3.7) | 79 (3.8) | 261 (3.7) |  |
Male sex | 4280 (47.1) | 1049 (50.3) | 3231 (46.2) |  < 0.001 |
Cough | 3489 (38.4) | 1105 (53.0) | 2384 (34.1) |  < 0.001 |
Contacta COVID-19+ | 3179 (35.0) | 1004 (48.2) | 2175 (31.1) |  < 0.001 |
Breathing difficulties | 1034 (11.4) | 281 (13.5) | 753 (10.8) | 0.001 |
Runny nose | 3087 (34.0) | 870 (41.7) | 2217 (31.7) |  < 0.001 |
Sore throat | 2850 (31.4) | 629 (30.2) | 2221 (31.7) |  < 0.001 |
Ear pain | 546 (6.0) | 123 (5.9%) | 423 (6.0) | 0.834 |
Headache | 3502 (38.6) | 1080 (51.8) | 2422 (34.6) |  < 0.001 |
Fever | 1246 (13.7) | 584 (28.0) | 662 (9.5) |  < 0.001 |
Diarrhea | 1000 (11.0) | 261 (12.5) | 739 (10.6) | 0.013 |
Nausea | 787 (8.7) | 210 (10.0) | 577 (8.2) | 0.010 |
Loss of smell | 754 (8.3) | 529 (25.4) | 225 (3.1) |  < 0.001 |
Loss of taste | 715 (7.9) | 466 (22.4) | 249 (3.6) |  < 0.001 |
Diabetes | 289 (3.2) | 76 (3.6) | 213 (3.0) | 0.177 |
Immunosuppression | 92 (1.0) | 15 (0.7) | 77 (1.1) | 0.136 |
Chronic pulmonary disease | 149 (1.6) | 32 (1.5) | 117 (1.7) | 0.768 |
Chronic heart disease | 221 (2.4) | 51 (2.4) | 170 (2.4) | 0.936 |
Cancer | 226 (2.5) | 46 (2.2) | 180 (2.6) | 0.379 |
Healthcare worker | 409 (4.5) | 93 (4.5) | 316 (4.5) | 0.952 |
Respiratory allergies | 1121 (12.3) | 247 (11.8) | 874 (12.5) | 0.448 |
Smoking | 1408 (15.5) | 208 (10.0) | 1200 (17.2) |  < 0.001 |
Unusual fatigue | 2762 (30.4) | 845 (40.5) | 1917 (27.4) |  < 0.001 |
Obesity (BMI > 30) | 1212 (13.3) | 286 (13.7) | 926 (13.2) | 0.557 |
Muscle stiffness | 2481 (27.3) | 936 (44.9) | 1545 (22.1) |  < 0.001 |
Back pain | 2031 (22.4) | 784 (37.6) | 1247 (17.8) |  < 0.001 |
Loss of appetite | 930 (10.2) | 410 (19.7) | 520 (7.4) |  < 0.001 |
Loss of weight | 160 (1.8) | 78 (3.7) | 82 (1.2) |  < 0.001 |
Dizziness | 651 (7.2) | 206 (9.9) | 445 (6.4) |  < 0.001 |