General characteristics of study subjects
Variable | Positive (n=320) | Negative (n=3,070) | P-value |
---|---|---|---|
Age (y) | 49.8±17.3 | 43.1±14.5 | <0.01 |
Sex | <0.01 | ||
Male | 118 (36.9) | 1,605 (52.3) | |
Female | 202 (63.1) | 1,465 (47.7) | |
Fever (≥37.8°C) at the time of visit | 75 (23.4) | 283 (9.2) | <0.01 |
Contact history | 196 (61.3) | 1,232 (40.1) | <0.01 |
Symptomatic | 257 (80.3) | 1,803 (58.7) | <0.01 |
Symptom duration (d) | 5.0±6.8 | 3.2±5.9 | <0.01 |
Symptom | |||
Cough | 154 (48.1) | 876 (28.5) | <0.01 |
Sputum | 104 (32.5) | 646 (21.0) | <0.01 |
Myalgia | 95 (29.7) | 467 (15.2) | <0.01 |
Fever | 82 (25.6) | 479 (15.6) | <0.01 |
Sore throat | 79 (24.7) | 767 (25.0) | 0.907 |
Chill | 64 (20.0) | 350 (11.4) | <0.01 |
Dyspnea | 32 (10.0) | 196 (6.4) | 0.014 |
Headache | 25 (7.8) | 200 (6.5) | 0.375 |
Chest pain | 11 (3.4) | 76 (2.5) | 0.300 |
Diarrhea | 10 (3.1) | 33 (1.1) | 0.006 |
Dizziness | 9 (2.8) | 22 (0.7) | 0.002 |
Rhinorrhea, nasal obstruction | 9 (2.8) | 58 (1.9) | 0.259 |
Nausea, vomiting | 6 (1.9) | 25 (0.8) | 0.066 |
Abdominal pain | 5 (1.6) | 13 (0.4) | 0.022 |
Values are presented as number (%) or mean±standard deviation.
P-value by chi-square.
aP-value by t-test. bP-value by Fisher’s exact test.