Table 2 Comparison of characteristics between virus-positive and virus-negative groups
| Â | AP group | Non-AP group | AB group | ||||||
|---|---|---|---|---|---|---|---|---|---|
|  | PCR positive n = 28 | PCR negative n = 31 | p-value | PCR positive n = 59 | PCR negative n = 59 | p-value | PCR positive n = 17 | PCR negative n = 15 | p-value |
Age, average ± SD | 77 ± 15 | 86 ± 10 | 0.004 | 74 ± 17 | 74 ± 18 | 0.804 | 69 ± 19 | 76 ± 16 | 0.264 |
Temperature ≥ 38.0℃, n (%) | 26 (93) | 28 (90) | 0.549 | 44 (75) | 42 (71) | 0.418 | 15 (88) | 12 (80) | 0.437 |
Rhinitis, n (%) | 7 (25) | 3 (10) | 0.111 | 11 (19) | 8 (14) | 0.309 | 5 (29) | 2 (13) | 0.254 |
Pharyngitis, n (%) | 1 (4) | 1 (3) | 0.728 | 10 (17) | 9 (15) | 0.500 | 2 (12) | 2 (13) | 0.650 |
Cough, n (%) | 15 (54) | 14 (45) | 0.350 | 28 (47) | 35 (59) | 0.134 | 13 (76) | 9 (60) | 0.267 |
Sputum, n (%) | 22 (79) | 21 (68) | 0.262 | 31 (53) | 31 (53) | 0.573 | 11 (65) | 6 (40) | 0.149 |
Digestive symptom, n (%) | 4 (14) | 4 (13) | 0.587 | 3 (5) | 3 (5) | 0.660 | 1 (6) | 1 (7) | 0.726 |
Chilly sensation, chill, shivering, n (%) | 7 (25) | 10 (32) | 0.373 | 19 (32) | 12 (20) | 0.105 | 8 (47) | 4 (27) | 0.206 |
General malaise, n (%) | 2 (7) | 7 (23) | 0.098 | 19 (32) | 17 (29) | 0.421 | 7 (41) | 2 (13) | 0.087 |
Acute respiratory failure, n (%) | 12 (43) | 13 (42) | 0.576 | 30 (51) | 29 (49) | 0.500 | 4 (24) | 4 (27) | 0.579 |
Coarse crackles, n (%) | 9 (32) | 15 (48) | 0.158 | 24 (41) | 23 (39) | 0.500 | 5 (29) | 6 (40) | 0.398 |
Wheezes, n (%) | 4 (14) | 5 (16) | 0.567 | 5 (8) | 12 (20) | 0.057 | 1 (6) | 2 (13) | 0.452 |
Rhonchi, n (%) | 7 (25) | 6 (19) | 0.417 | 9 (15) | 7 (12) | 0.394 | 1 (6) | 0 | 0.531 |
Sputum culture positive, n (%) | n = 27 8 (29) | n = 28 13 (42) | 0.213 | n = 55 29 (49) | n = 51 37 (63) | 0.097 | n = 16 7 (41) | n = 12 6 (40) | 0.615 |
Consolidation on chest X-ray, n (%) | 10 (36) | 13 (42) | 0.790 | 35 (59) | 43 (73) | 0.173 | 0 | 0 | - |