Table 1.
Description of the study patients
| Characteristics | Number (percentage) | |||
|---|---|---|---|---|
| Neonates | Older children | |||
| Male-to-female ratio | 1.16 | 1.22 | ||
| Surgical patients | 81 | (47.4) | 801 | (49.0) |
| Ventilated patientsa | 115 | (67) | 806 | (49) |
| PRISM score, median (Q1-Q3)a | 10 | (5-16) | 5 | (2-10) |
| Administrative length of stay in PICU in days, mean; median (Q1-Q3)a | 8.0; 6 | (3-6) | 5.5; 3 | (2-6) |
| Organ system of primary dysfunction on admissionb | ||||
| Respiratory | 63 | (36.8) | 568 | (34,7) |
| Neurologic | 16 | (9.4) | 319 | (19.5) |
| Cardiovascular | 60 | (35.1) | 425 | (26.0) |
| Hepatic | 1 | (0.6) | 33 | (2.0) |
| Genitourinary | 4 | (2.3) | 31 | (1.9) |
| Gastrointestinal | 20 | (11.7) | 71 | (4.3) |
| Endocrine | 1 | (0.6) | 21 | (1.3) |
| Musculoskeletal | 0 | (0.0) | 68 | (4.2) |
| Hematologic | 1 | (0.6) | 23 | (1.4) |
| Miscellaneous/undetermined | 5 | (2.9) | 76 | (4.7) |
| Primary category of illness on admission | ||||
| Infection | 34 | (19.9) | 405 | (24.8) |
| Traumaa | 1 | (0.6) | 174 | (10.6) |
| Congenital diseasea | 102 | (59.7) | 561 | (34.3) |
| Chemical injury | 0 | (0.0) | 25 | (1.5) |
| Drug | 1 | (0,6) | 11 | (0,7) |
| Cancerb | 1 | (0.6) | 59 | (3.6) |
| Diabetes | 0 | (0.0) | 18 | (1.1) |
| Allergic/Immunologic diseasesb | 0 | (0.0) | 42 | (2.6) |
| Miscellaneous/Undetermined | 32 | (18.7) | 340 | (20.8) |
| Deathsa | 25 | (14.6) | 90 | (5.5) |
aP < 10−4; bP < 0.05. PICU, pediatric intensive care unit; PRISM, pediatric risk of mortality; Q1-Q3, first and third quartile.