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Table 3 Univariable risk regression of ICU delirium

From: Incidence and risk factors of delirium in multi-center Thai surgical intensive care units: a prospective cohort study

Risk factors Risk ratio 95 % CI P
Age group (years)    
 <40 (n, %) 1.00   Reference
 40–70 (n, %) 1.68 0.89–3.16 0.107
 >70 (n, %) 2.26 1.20–4.26 0.011
Male 1.20 0.87–1.65 0.259
Smoking 1.77 1.30–2.40 <0.001
Chronic renal failure 1.70 1.11–2.61 0.015
Hypoalbuminemia (<2.5 versus ≥2.5 g/dl) 1.92 1.37–2.67 <0.001
Emergency surgery 4.50 3.08–6.58 <0.001
Upper abdominal surgery 1.37 0.99–1.89 0.056
Lower abdominal surgery 0.95 0.67–1.35 0.799
Thoracic surgery 2.46 1.45–4.91 0.001
Higher APACHE II score (>24 versus ≤24) 1.09 1.07–1.11 <0.001
Sepsis 8.24 5.94–11.45 <0.001
Mechanical ventilation 4.00 2.53–6.29 <0.001
Exposure to sedative medications 7.01 5.05–9.74 <0.001
Exposure to analgesic medications 0.83 0.56–1.25 0.386
  1. APACHE II Acute Physiology and Chronic Health Evaluation II