| ICU Admission | No ICU Admission | OR(95% CI) | P |
---|---|---|---|---|
Age n(%) | ||||
 < 6 m | 1949 (69.02) | 7342 (42.32) | 0.62 [0.59–0.64] | < 0.0001 |
 6 m-1y | 319 (11.30) | 3200 (18.44) |  | |
 1y-2y | 282 (9.99) | 3027 (17.45) |  | |
 2y-6y | 274 (9.70) | 3781 (21.79) |  | |
Gender (male) n(%) | 1878 (66.50) | 11,287 (65.05) | 1.07 [0.98–1.16] | 0.1343 |
Rural resident n(%) | 1467 (51.98) | 5625 (32.59) | 2.24 [2.07–2.43] | < 0.0001 |
Premature birth n(%) | 658 (24.38) | 1480 (8.64) | 3.41 [3.08–3.78] | < 0.0001 |
LBW n(%) | 659 (23.98) | 1339 (7.86) | 3.70 [3.33–4.10] | < 0.0001 |
Unhealthy parents | 340 (12.26) | 1250 (7.28) | 1.78 [1.57–2.02] | < 0.0001 |
Feeding | ||||
 Breastfeeding | 1083 (39.22) | 9035 (52.73) | 1.45 [1.38–1.52] | < 0.0001 |
 Mixture | 934 (33.83) | 5103 (29.78) |  | |
 Formula | 744 (26.95) | 2997 (17.49) |  | |
CHD | 1095 (38.77) | 1634 (9.42) | 6.09 [5.56–6.67] | < 0.0001 |
History of pneumonia | 673 (23.83) | 2112 (12.17) | 2.26 [2.05–2.49] | < 0.0001 |
History of jaundice | 207 (7.33) | 444 (2.56) | 3.01 [2.54–3.57] | < 0.0001 |
Symptoms at admission n(%) | ||||
 Cough | 2145 (75.96) | 15,762 (90.85) | 0.32 [0.29–0.35] | < 0.0001 |
 Fever | 885 (31.34) | 7882 (45.43) | 0.55 [0.50–0.60] | < 0.0001 |
 Wheezing | 483 (17.10) | 2479 (14.29) | 1.24 [1.11–1.38] | < 0.0001 |
 Dyspnea | 679 (24.04) | 1588 (9.15) | 28.38 [17.01–47.36] | < 0.0001 |
 Cyanosis | 264 (9.35) | 88 (0.51) | 20.23 [15.84–25.84] | < 0.0001 |
Abnormal chest X-ray | 461 (16.32) | 459 (2.65) | 8.26 [7.20–9.47] | < 0.0001 |
Abnormal results n(%) | ||||
 WBC | 1318 (89.23) | 7746 (80.76) | 1.89 [1.62–2.21] | < 0.0001 |
 Neutrophils | 762 (53.14) | 2409 (25.24) | 3.36 [3.00–3.76] | < 0.0001 |
 Lymphocytes | 881 (61.44) | 2781 (29.14) | 3.87 [3.45–4.35] | < 0.0001 |
 Blood serum | 487 (33.94) | 990 (9.96) | 4.64 [4.09–5.28] | < 0.0001 |
 CRP | 542 (35.33) | 2489 (27.17) | 1.49 [1.34–1.66] | < 0.0001 |
 ESR | 131 (70.43%) | 1272 (82.38%) | 0.51 [0.36–0.72] | 0.0001 |
 ALB | 173 (11.70) | 296 (2.96) | 9.14 [7.89–10.58] | < 0.0001 |
 ALT | 149 (10.37) | 352 (3.53) | 3.16 [2.59–3.86] | < 0.0001 |
 AST | 189 (13.13) | 393 (3.94) | 3.68 [3.07–4.43] | < 0.0001 |
 TBIL | 372 (25.89) | 1047 (10.51) | 2.98 [2.60–3.40] | < 0.0001 |
 SCR | 44 (3.07%) | 139 (1.40%) | 2.23 [1.58–3.14] | < 0.0001 |
 Proteinuria | 442 (33.01) | 1105 (14.15) | 2.92 [2.58–3.31] | < 0.0001 |
 RSV | 160 (25.56) | 319 (20.05) | 1.53 [1.24–1.87] | 0.0046 |