Matched Demographic and Clinical Characteristics of Cases and Controls
| Cases (Fractures) N = 35 | Controls (No Fractures) N = 70 | P | |
|---|---|---|---|
| N (% of cases) or Median (25th to 75th IQR) | N (% of cases) or Median (25th to 75th IQR) | ||
| Age category at admission | .72 | ||
| ≤30 d | 13 (37) | 31 (44) | |
| >30 d and <24 mo | 19 (54) | 35 (50) | |
| ≥24 mo | 3 (9) | 4 (6) | |
| Age in months at admission | 1.0 (0.0 to 9.0) | 1.0 (0.0 to 4.0) | .30 |
| Sex, female | 17 (49) | 27 (39) | .33 |
| Admission year | .57 | ||
| 2008 | 2 (6) | 4 (6) | |
| 2009 | 1 (3) | 8 (11) | |
| 2010 | 5 (14) | 11 (16) | |
| 2011 | 13 (37) | 16 (23) | |
| 2012 | 9 (26) | 22 (31) | |
| 2013 | 5 (14) | 9 (13) | |
| Event Qa | .59 | ||
| Q1 | 12 (34) | 18 (26) | |
| Q2 | 10 (29) | 16 (23) | |
| Q3 | 6 (17) | 17 (24) | |
| Q4 | 7 (20) | 19 (27) | |
| Length of hospital stay, d | 117.0 (69.0 to 194.0) | 95.5 (40.0 to 144.0) | .16 |
| Hospital unit | .30 | ||
| NICU | 18 (51) | 43 (61) | |
| Medical or Surgical ICU | 6 (17) | 4 (6) | |
| Cardiac step-down unit | 4 (11) | 7 (10) | |
| Cardiac ICU | 7 (20) | 16 (23) | |
| Total days in ICU | 82.0 (49.0 to 155.0) | 78.5 (29.0 to 126.0) | .16 |
| Case mix index | 10.7 (6.9 to 19.8) | 13.7 (5.6 to 23.3) | .71 |
| APR DRGb | .18 | ||
| Major stomach esophageal and duodenal procedures | 8 (23) | 4 (6) | |
| Other vascular procedures | 4 (11) | 0 (0) | |
| Neonate birth weight <1500 g with major procedure | 4 (11) | 8 (11) | |
| Tracheostomy with long-term mechanical ventilation with extensive procedure or extracorporeal membrane oxygenation | 3 (9) | 11 (16) | |
| Heart and/or lung transplant | 2 (6) | 6 (9) |