Impact of a delirium prevention project among older hospitalized patients who underwent orthopedic surgery: a retrospective cohort study

Table 2 Effect of the delirium prevention project on the incidence of delirium

	Odds ratios	95% CI	P Values
Delirium prevention project	0.316	0.125–0.800	0.015
Age (year)	1.220	1.120–1.329	< 0.001
Sex	1.563	0.444–5.506	0.487
Body mass index (kg/m²)	0.919	0.802–1.053	0.222
ASA class	0.888	0.377–2.090	0.785
Number of medications	1.315	1.165–1.485	< 0.001
Existence of dementia medication^a	23.917	3.982–143.638	0.001
Number of diseases^b	1.151	0.610–2.170	0.664
Type of anesthesia (general vs. others)	0.484	0.132–1.780	0.275
Educational level^c			0.837
High (Reference)
Middle	0.653	0.158–2.696	0.555
Low	0.779	0.201–3.022	0.718
Living situation (institutionalization vs. home)	3.553	0.037–338.315	0.585
Marital status^d (married vs. others)	1.083	0.395–2.964	0.877
Type of surgery			0.021
Hip (Reference)
Shoulder	0.788	0.123–5.062	0.802
Spine	0.050	0.006–0.385	0.004
Knee	0.925	0.256–3.344	0.906
Others	0.158	0.027–0.904	0.038

ASA indicates American Society of Anesthesiologists
^aDementia medication was defined as donepezil, rivastigmine, galantamine, and memantine
^bNumber of diseases included hypertension, diabetes, heart disease, cancer, and Parkinson’s disease
^cEducational level was categorized as high (college graduate and higher), middle (middle-school graduate and higher), and low (elementary graduate and lower)
^dMarital status was categorized as married and others, including single, widowed, divorced, and others

ISSN: 1471-2318