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Table 3 Patients´ characteristics according to adverse perioperative outcome

From: Association between emergency department length of stay and adverse perioperative outcomes in emergency surgery: a cohort study in two Colombian University hospitals

  Adverse perioperative outcome P
Yes (n = 519) No (n = 968)
Gender, male 276 (53.2) 487 (50.3) 0.291
Age (years) 70.2 (59.1–79.4) 61.5 (53.1–72.5) < 0.001
Medical center    < 0.001
 Center A 414 (41.4) 587 (58.6)  
 Center B 105 (21.6) 381 (78.3)  
Preoperative medical conditions
 Hypertension 296 (57) 372 (38.5) < 0.001
 Diabetes mellitus 127 (24.5) 131 (13.5) < 0.001
 Chronic renal disease 73 (14.1) 49 (5.1) < 0.001
 Major cardiovascular diseasea 142 (27.4) 110 (11.4) < 0.001
 COPD 70 (13.5) 49 (5.1) < 0.001
 Active cancer 117 (22.5) 80 (8.3) < 0.001
 Major general surgery 151 (29.1) 85 (8.8) < 0.001
Risk factors for 30-day mortalityb    0.006
 No risk factors 78 (15) 440 (45.4)  
 1 or 2 risk factors 277 (53.4) 415 (45.9)  
  ≥ 3 risk factors 164 (31.6) 113 (11.7)  
Preoperative interventions
 Medical assessments 13 (6–27) 6 (4–9) < 0.001
 Laboratories 28 (13–59.5) 8 (4–15) < 0.001
 Diagnostic images 4 (2–7) 2 (1–3) < 0.001
Type of surgery    0.262
 General 394 (75.9) 709 (73.2)  
 Orthopedic 125 (24.1) 259 (26.8)  
 Duration of surgery (hours) 2.2 (1.6–3) 1.6 (1.3–2.3) < 0.001
 ED-LOS (hours) 53.2 (19.5–165.2) 26.1 (13.4–64.9) < 0.001
  1. Data are expressed as median (interquartile range), or absolute number (%). COPD Chronic obstructive pulmonary disease, ED-LOS Emergency department length of stay
  2. aIncludes history of coronary artery disease, stroke, heart failure, peripheral vascular disease
  3. bRisk factors as defined by VISION study [3]: Age ≥ 65 years, high risk coronary artery disease, history of PVD, history of stroke, COPD, active cancer and major general surgery