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Table 1 Patient’s baseline characteristics

From: The prognostic accuracy evaluation of SAPS 3, SOFA and APACHE II scores for mortality prediction in the surgical ICU: an external validation study and decision-making analysis

  Total Intra-ICU In-hospital
Alive Deaths p value Relative risk (95% CI) Alive Deaths p value Relative risk (95% CI)
Age median (IQR) 58 (47–67) 58 (47–67) 63 (53–70) < 0.001*   57 (46–67) 63 (54.5–71) < 0.001*  
Male sex count (%) 1798 (59.8) 1693 105 0.21**   1631 167 0.37**  
The urgency of the surgical procedure count (%)
Urgent 220 (7.3) 170 50    152 68   
Elective 2788 (92.7) 2675 113    2588 200   
Preexistent conditions count (%)
Arterial hypertension 1537 (51.1) 1452 85 0.72**   1394 143 0.40**  
Diabetes mellitus 634 (21.1) 604 30 0.39**   570 64 0.24**  
Alcohol use 371 (12.3) 347 24 0.34**   335 36 0.57**  
Tobacco use 1085 (36.1) 1029 56 0.64**   1001 84 0.09**  
Intra-ICU length of stay days median (IQR) 3 (2–5) 3 (2–5) 7 (3–15) < 0.001*      
In-hospital length of stay days median (IQR) 12 (8–20)      11 (7–19) 17 (9–34.5) < 0.001*  
Severity Scores median (IQR)
SOFA 3 (2–6) 3 (2–6) 7 (5–9) < 0.001*   3 (2–6) 6 (4–9) < 0.001*  
APACHE II 12 (9–15) 11 (8–14) 17 (13–22) < 0.001*   11 (8–14) 16 (13–20) < 0.001*  
SAPS 3 36 (28–44) 36 (28–43) 52 (43–60) < 0.001*   35 (28–43) 48 (41–58) < 0.001*  
Life support therapies
Mechanical ventilation count (%) 1491 (49.6) 1333 158 < 0.01** 3.97 (1.59–9.95) 1269 222 < 0.01** 1.44 (1.07–1.93)
Length of mechanical ventilation days median (IQR) 1 (1–2) 1 (1–1) 7 (2–12) < 0.01*   1 (1–1) 5 (2–11) < 0.01*  
Renal replacement therapy count (%) 143 (4.8) 93 50 < 0.01** 1.9 (1.42–2.53) 78 65 < 0.01** 1.78 (1.43–2.22)
  1. *Mann–Whitney
  2. **Chi-squared
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