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

Table 3 Complications Associated with Postoperative Delirium Following Primary Elective THA (2009–2014)

Complication	No delirium	Delirium	P	Odds Ratio	95% Confidence Interval
Major
Acute renal failure	8342 (2.17%)	383 (11%)	< 0.001	1.95	1.47–2.59
Death	490 (0.13%)	28 (0.81%)	0.08	1.43	0.96–2.13
Myocardial infarction	74 (0.02%)	6 (0.17%)	0.07	2.20	0.93–5.19
Pneumonia	1904 (0.49%)	127 (3.65%)	< 0.001	2.48	1.90–3.25
Pulmonary embolism	345 (0.09%)	8 (0.23%)	0.42	0.74	0.35–1.55
Stroke	2734 (0.71%)	102 (2.93%)	0.003	1.62	1.18–2.21
Any major complication^a	12,958 (3.37%)	567 (16.3%)	< 0.001	2.59	1.92–3.48
Minor
Deep vein thrombosis	646 (0.17%)	21 (0.6%)	0.66	0.83	0.36–1.93
Dislocation	857 (0.22%)	30 (0.86%)	0.56	1.29	0.55–3.00
Seroma/hematoma	1010 (0.26%)	48 (1.38%)	0.41	1.39	0.63–3.03
Wound infection	379 (0.1%)	22 (0.63%)	0.35	1.46	0.66–3.21
Any minor complication^b	2790 (0.72%)	113 (3.25%)	0.03	2.44	1.08–5.50

Any major complication^a or minor complication^b: patients with more than one complication are counted only once

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