TABLE 1

Matched Demographic and Clinical Characteristics of Cases and Controls

Cases (Fractures) N = 35Controls (No Fractures) N = 70P
N (% of cases) or Median (25th to 75th IQR)N (% of cases) or Median (25th to 75th IQR)
Age category at admission.72
 ≤30 d13 (37)31 (44)
 >30 d and <24 mo19 (54)35 (50)
 ≥24 mo3 (9)4 (6)
Age in months at admission1.0 (0.0 to 9.0)1.0 (0.0 to 4.0).30
Sex, female17 (49)27 (39).33
Admission year.57
 20082 (6)4 (6)
 20091 (3)8 (11)
 20105 (14)11 (16)
 201113 (37)16 (23)
 20129 (26)22 (31)
 20135 (14)9 (13)
Event Qa.59
 Q112 (34)18 (26)
 Q210 (29)16 (23)
 Q36 (17)17 (24)
 Q47 (20)19 (27)
Length of hospital stay, d117.0 (69.0 to 194.0)95.5 (40.0 to 144.0).16
Hospital unit.30
 NICU18 (51)43 (61)
 Medical or Surgical ICU6 (17)4 (6)
 Cardiac step-down unit4 (11)7 (10)
 Cardiac ICU7 (20)16 (23)
Total days in ICU82.0 (49.0 to 155.0)78.5 (29.0 to 126.0).16
Case mix index10.7 (6.9 to 19.8)13.7 (5.6 to 23.3).71
APR DRGb.18
 Major stomach esophageal and duodenal procedures8 (23)4 (6)
 Other vascular procedures4 (11)0 (0)
 Neonate birth weight <1500 g with major procedure4 (11)8 (11)
 Tracheostomy with long-term mechanical ventilation with extensive procedure or extracorporeal membrane oxygenation3 (9)11 (16)
 Heart and/or lung transplant2 (6)6 (9)
  • a Fracture date for cases and index date for controls.

  • b Top 5 most common for cases shown.