Skip to main content
. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Ann Thorac Surg. 2015 Jan 24;99(3):932–938. doi: 10.1016/j.athoracsur.2014.10.069

Table 1.

Study population characteristics

N = 46,056 (33 hospitals)
Patient characteristics
 Age at surgery 6.4 months (33 days – 3.5 years)
 Sex, male 25,533 (55%)
 Weight at surgery (kg) 6.4 (3.6 – 14.3)
 Proportion of operations included within various case ascertainment methodologies*:
  Clinical registry data
   STAT 42,324 (96.8%)
  Administrative data
   AHRQ 39,763 (90.9%)
   RACHS-1 37,419 (85.5%)
Hospital characteristics
 Geographic location
  South 11 (33.3%)
  Midwest 11 (33.3%)
  West 7 (21.2%)
  Northeast 4 (12.2%)

Data are displayed as number and percent or median and interquartile range as appropriate.

*

Based on n=43,744 cardiovascular operations with and without bypass, excluding patient ductus arteriosus ligation in infants < 2.5 kg at surgery