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Table 4 Risk Factors for Postoperative Delirium (2009–2014)

From: Incidence and risk factors associated with postoperative delirium following primary elective total hip arthroplasty: a retrospective nationwide inpatient sample database study

Variable Odds Ratio 95% Confidence Interval P
Age ≥ 61 yr 4.27 3.76–4.86 < 0.001
Female 0.88 0.82–0.95 < 0.001
Alcohol abuse 1.85 1.51–2.27 < 0.001
Deficiency anemia 1.32 1.21–1.45 < 0.001
Chronic blood loss anemia 1.43 1.15–1.79 0.002
Congestive heart failure 1.62 1.42–1.86 < 0.001
Coagulopathy 1.43 1.22–1.67 < 0.001
Depression 1.39 1.26–1.53 < 0.001
Diabetes, uncomplicated 1.27 1.15–1.39 < 0.001
Diabetes with chronic complications 1.55 1.25–1.92 < 0.001
Drug abuse 2.53 1.90–3.36 < 0.001
Hypertension 1.23 1.13–1.34 < 0.001
Lymphoma 1.58 1.04–2.41 0.03
Fluid and electrolyte disorders 2.58 2.37–2.81 < 0.001
Metastatic cancer 1.94 1.27–2.96 0.002
Other neurological disorders 9.43 8.69–10.24 < 0.001
Obesity 0.72 0.64–0.81 < 0.001
Peripheral vascular disorders 1.33 1.14–1.55 < 0.001
Psychoses 1.82 1.52–2.17 < 0.001
Pulmonary circulation disorders 1.61 1.30–2.00 < 0.001
Renal failure 1.40 1.24–1.58 < 0.001
Valvular disease 1.40 1.22–1.60 < 0.001
Weight loss 1.76 1.41–2.20 < 0.001