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Table 1 Data for two populations of general surgical patients identified from the CHKS database

From: Identification and characterisation of the high-risk surgical population in the United Kingdom

  Standard population High-risk population P
n 3,603,803 513,924 -
Age (years) 54 (38–69) 75 (63–83) <0.0001
Emergency procedures 769,371 (21.3%) 454,924 (88.5%) <0.0001
Duration of hospital stay (days) 3 (1–6) 16 (9–29) <0.0001
Mortality 15,038 (0.42%) 63,340 (12.3%) <0.0001
  1. Data presented as median (interquartile range) or n (%). Standard population, all patients admitted to hospital undergoing a procedure with an overall mortality rate of less than 5%; high-risk population, patients undergoing a procedure with an overall mortality rate of 5% or greater.