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Table 2 Patient characteristics according to emergency department length of stay

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

  ED-LOS ≤ 48 h (n = 905) ED-LOS >  48 h (n = 582) P
Gender, male 469 (51.8) 294 (50.5) 0.622
Age (years) 62.6 (53.1–73.6) 68.4 (57.8–77.2) < 0.001
Medical center    0.481
 Center A 603 (60.2) 398 (39.8)  
 Center B 302 (62.1) 184 (37.9)  
Preoperative medical conditions
 Hypertension 361 (39.9) 307 (52.8) < 0.001
 Diabetes mellitus 121 (13.4) 137 (23.6) < 0.001
 Chronic renal disease 53 (5.9) 69 (11.9) < 0.001
 Major cardiovascular diseasea 118 (13.0) 134 (23.0) < 0.001
 COPD 57 (6.3) 62 (10.7) 0.002
 Active cancer 76 (8.4) 121 (20.8) < 0.001
 Major general surgery 132 (14.6) 104 (17.9) 0.090
Risk factors for 30-day mortalityb    0.006
 No risk factors 377 (41.7) 141 (24.2)  
 1 or 2 risk factors 403 (44.5) 289 (49.6)  
  ≥ 3 risk factors 125 (13.8) 152 (26.1)  
Preoperative interventions
 Medical assessments 5 (4–7) 16 (10–30) < 0.001
 Laboratories 8 (4–14) 27.5 (12–60) < 0.001
 Diagnostic images 2 (1–3) 4 (2.5–7) < 0.001
Type of surgery    < 0.001
 General 700 (77.3) 403 69.2)  
 Orthopedic 205 (22.7) 179 (30.8)  
 Duration of surgery (hours) 1.8 (1.3–2.4) 2 (1.3–2.8) < 0.001
  1. Data are presented as median (interquartile range), or absolute number (%). ED-LOS Emergency department length of stay, COPD chronic obstructive pulmonary disease
  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, history of coronary artery disease, congestive heart failure, PVD, stroke, COPD, active cancer and major general surgery