Table 1.
Comparison of clinical symptoms and signs of MPP in children with different age groups
| Clinical characteristics | <6 months n=412, n (%) | 6~12 months n=423, n (%) | 1~3 years n=1033, n (%) | 3~5 years n=733, n (%) | ≥5 years n=757, n (%) | Χ2 or Z value | P |
|---|---|---|---|---|---|---|---|
| Male | 253 (61.4) | 287 (67.8) | 567 (54.9) | 347 (47.3) | 379 (50) | 59.55 | 0.000 |
| Fever | 86 (20.9) | 211 (49.9) | 684 (66.2) | 597 (81.4) | 633 (83.6) | 604.15 | 0.000 |
| <38°C | 46 (53.5) | 194 (45.9) | 340 (49.7) | 66 (11.1) | 32 (4.2) | 474.25 | 0.000 |
| 38-39°C | 25 (29.1) | 148 (34.9) | 218 (31.9) | 197 (33) | 105 (13.9) | 145.31 | 0.000 |
| ≥39°C | 15 (17.4) | 81 (19.2) | 126 (18.4) | 334 (55.9) | 620 (81.9) | 1228.51 | 0.000 |
| Cough | 409 (99.3) | 415 (98.1) | 1025 (99.2) | 733 (100) | 757 (100) | 22.68 | 0.000 |
| Dry cough | 58 (14.1) | 77 (18.2) | 301 (29.1) | 410 (55.9) | 622 (82.2) | 123.20 | 0.000 |
| Wet cough | 354 (85.9) | 346 (81.8) | 732 (70.9) | 323 (44.1) | 135 (17.8) | 154.50 | 0.000 |
| Wheezing | 173 (41.9) | 245 (57.9) | 426 (41.2) | 155 (21.1) | 59 (7.8) | 436.78 | 0.000 |
| Rhinorhea | 264 (64) | 141 (33.3) | 179 (17.3) | 194 (26.5) | 135 (17.8) | 375.67 | 0.000 |
| Tachypnea | 69 (16.7) | 49 (11.6) | 87 (8.4) | 45 (6.1) | 25 (3.3) | 74.83 | 0.000 |
| Dyspnea | 22 (5.3) | 21 (4.9) | 37 (3.6) | 25 (3.4) | 22 (2.9) | 6.36 | 0.174 |
| Cyanosis | 20 (4.9) | 8 (1.9) | 16 (1.5) | 7 (0.1) | 6 (1) | 30.98 | 0.000 |
| Rales | 372 (90.3) | 396 (93.6) | 909 (88) | 490 (66.9) | 165 (21.8) | 1180.72 | 0.000 |
| SaO2<92% | 64 (15.5) | 46 (10.9) | 82 (7.9) | 38 (7.4) | 21 (2.8) | 75.83 | 0.000 |
| Length of hospital stay (d) | 8.2±3.3 | 8.1±3.1 | 7.8±2.7 | 7.8±3.4 | 8.0±3.2 | 2.28 | 0.059 |