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Table 3 Characteristics of readmitted and non-readmitted patients

From: Risk prediction of ICU readmission in a mixed surgical and medical population

Variables Readmission (n = 27)   No. of readmission (n = 705)   p value
   95 % CI   95 % CI  
Age, years, mean 64.7 60–70 54.2 53–56 0.005
Gender, n (%)      0.38
  Male 400 (57)   13 (48)   
  Female 305 (43)   14 (52)   
Original source of admission, n (%)      0.42
  Emergency department 4 (15)   210 (29)   
  Other ICU 1 (4)   36 (5)   
  Other hospital 2 (7)   42 (6)   
  Operating theatre 6 (22)   192 (25)   
  Ward 14 (52)   216 (31)   
  Delivery ward 0 (0)   9 (1)   
Ward at admission, n (%)      0.26
  Medical wards 7 (26)   288 (41)   
  Surgical wards 19 (70)   404 (57)   
  Oncologic wards 1 (4)   13 (2)   
Comorbidity, n (%)      
  Immunodeficiency 1 (4)   13 (2)   0.05
  Chronic obstructive pulmonary disease 1 (4)   46 (6)   0.59
  Kidney failure 6 (23)   54 (8)   0.005
  Chronic 2 (7)   10 (1)   
  Liver failure 0 (0)   6 (1)   0.64
  Heart failure 0 (0)   22 (3)   0.36
  Malignancy 4 (15)   84 (12)   0.59
  Sepsis 3 (12)   75 (11)   0.88
Outcome      
  Total length of ICU stay, days, mean (SD) 7.5 (7.5)   2.9 (5.1)   0.004
  Length of ICU stay, primary admission, mean (SD) 3.0 (5.2)   2.8 (4.1)   0.88
  ICU mortality, n (%) 6 (22)   na   
  30-day mortality, n (%) 7 (26)   50 (7)   <0.001
  Treatment strategy, n (%) 6 (22)   na   
  1. CI confidence interval