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Table 4 Multivariate logistic regression analysis of risk factors of delirium. Use of sedative-hypnotics and pre-operative Hb level were independent risk factors for developing post-operative delirium. The adjusted odds ratios for the use of sedative-hypnotics and pre-operative Hb level were 4.6 and 0.53, respectively

From: Pre-operative hemoglobin level and use of sedative-hypnotics are independent risk factors for post-operative delirium following total knee arthroplasty

  Odds ratio 95% CI P-Value
Age (years) 1.08 0.99-1.20 0.08
Use of sedative-hypnotics 4.61 1.11-20.2 0.035*
Pre-operative levels of Hb (g/dl) 0.53 0.31-0.87 0.011*
Post-operative day 3 BUN (mg/dl) 1.05 0.98-1.13 0.171