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Table 2 Patient characteristics

From: Variation in rates of ICU readmissions and post-ICU in-hospital mortality and their association with ICU discharge practices

  (n = 42,040)
Median age in years (IQR) 65 (54 to 75)
Male (%) 23,832 (56.7)
Mechanical ventilation in the first 24 h of admission (%) 14,810 (35.2)
Vasoactive medication (%) 11,183 (26.6)
Planned admission (%) 12,918 (30.7)
Readmissions (%) 3463 (8.2)
Readmissions within 48 h of ICU discharge (%) 1216 (2.9)
Length of stay
 Median intensive care length of stay in days (IQR) 1.0 (0.80 to 2.9)
 Median hospital length of stay in days (IQR) 11.0 (6.0 to 20.0)
Mortality
 Post-ICU in-hospital mortality rate (%) 2811 (6.7)
APACHE IV standardized mortality rate
 Median APACHE III score (IQR) 49 (49 to 68)
 Mean APACHE IV probability (SD) 0.15 (0.19)
 APACHE IV standardized mortality rate (95% CI) 0.78 (0.77 to 0.80)
Admission type:
 Medical/non-surgical (%) 18,324 (43.6)
 Emergency surgery (%) 7139 (17.0)
 Planned surgery (%) 16,577 (39.4)
Admission source:
 Operating theatre (%) 21,694 (51.6)
 Emergency room (%) 8262 (19.7)
 Ward (%) 9477 (22.5)
 High or medium care (%) 159 (0.4)
 Other hospital (%) 630 (1.5)
Other (%) 1818 (4.3)
Comorbidity on admission:
 Confirmed infection (%) 6300 (15.0)
 Cardiopulmonary resuscitation (%) 1177 (2.8)
 Dysrhythmia (%) 3136 (7.5)
 Acute renal failure (%) 2658 (6.3)
 Cardiovascular accident (%) 1513 (3.6)
 Gastrointestinal bleeding (%) 977 (2.3)
Number of chronic comorbidities:
 None (%) 25,238 (60.0)
 One (%) 11,538 (27.4)
 Two (%) 4042 (9.6)
 Three (%) 1029 (2.4)
 More than three (%) 193 (0.6)
Patients discharged to:
 Ward (%) 39,493 (93.9)
 Recovery or medium care (%) 1239 (3.1)
 Coronary care unit or other intensive care unit (%) 1308 (3.0)