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Table 4 Univariate logistic regression analysis of risk factors for having a prevalent delirium after acute admission

From: Risk factors for delirium in acutely admitted elderly patients: a prospective cohort study

Variable Unadjusted Hazard ratio (95% CI) p-value
Age (yrs.) 1.08 (1.02–1.13) <0.01
Male 1.62 (0.74–3.53) 0.23
Comorbidity   
   Mild 1.00  
   Moderate 0.74 (0.26–2.16) 0.58
   Severe 0.68 (0.25–1.81) 0.43
Cognitive impairment 10.98 (3.56–33.83) <0.01
Katz ADL   
   0–4 1.00  
   5–6 4.22 (0.90–19.92) 0.07
   ≥ 7 11.76 (3.23–42.77) <0.01
Admission reason   
   Infectious disease 0.71 (0.25–2.04) 0.52
   Malignancy 0.25 (0.04–1.41) 0.12
   Gastrointestinal bleeding 0.19 (0.02–1.77) 0.14
   Water and electrolyte disturbances 6.50 (1.05–40.13) 0.04
   Other 1.00  
Urea (mmol/L) 1.06 (1.01–1.11) 0.01
Creatinine (μmol/L) 1.00 (1.00–1.00) 0.36
Leucocytes (* 109/L) 0.95 (0.88–1.01) 0.11
CRP 1.00 (1.00–1.01) 0.31
Number of medications 0.96 (0.86–1.08) 0.51
   Benzodiazepines (%) 1.84 (0.60–5.62) 0.29
   Narcotic analgetics (%) 2.31 (0.66–8.1) 0.19
   Corticosteroids (%) 1.48 (0.46–4.78) 0.51
   Antihistaminics (%) 1.28 (0.11–14.58) 0.84
   Cholinergic drugs (%) 1.30 (0.31–5.50) 0.72
   Any of these 5 medications (%) 1.41 (0.61–3.27) 0.42