Bivariate Analyses by Level of Care
| Variable | Ward or Newborn Level 1 | NICU Level 2–4 or PICU | P |
|---|---|---|---|
| Patients | 93 370 | 1256 | |
| LOS, d, mean (SD) | 2.69 (1.05) | 2.84 (1.43) | < .001 |
| Cost, US$, mean (SD) | 1566 (1465) | 2278 (2551) | < .001 |
| 30-d readmissions rate, n (%) | 2901 (3.1) | 37 (3.0) | .99 |
| Girls, n (%) | 46 937 (50.3) | 584 (46.5) | .007 |
| Race, n (%) | < .001 | ||
| White | 51 096 (57.4) | 734 (60.3) | |
| African American | 8610 (9.7) | 248 (20.4) | |
| Hispanic | 14 622 (16.4) | 87 (7.2) | |
| Asian American | 5614 (6.3) | 44 (3.6) | |
| Other | 9144 (10.2) | 104 (8.6) | |
| Insurance, n (%) | < .001 | ||
| Private | 49 609 (54.2) | 634 (50.6) | |
| Medicaid | 34 301 (37.5) | 478 (38.1) | |
| Self-pay | 4889 (5.3) | 65 (5.2) | |
| Other | 2683 (2.9) | 75 (6.0) | |
| Hemolysis | 4721 (5.1) | 296 (23.6) | < .001 |
| Year, n (%) | < .001 | ||
| 2005 | 14 477 (15.5) | 222 (17.7) | |
| 2006 | 14 407 (15.4) | 241 (19.2) | |
| 2007 | 13 615 (14.6) | 181 (14.4) | |
| 2008 | 13 208 (14.2) | 188 (15.0) | |
| 2009 | 14 035 (15.0) | 168 (13.4) | |
| 2010 | 12 614 (13.5) | 134 (10.7) | |
| 2011 | 11 014 (11.8) | 122 (9.7) |