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

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

  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 medicationa 23.917 3.982–143.638 0.001
Number of diseasesb 1.151 0.610–2.170 0.664
Type of anesthesia (general vs. others) 0.484 0.132–1.780 0.275
Educational levelc    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 statusd (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
  1. ASA indicates American Society of Anesthesiologists
  2. aDementia medication was defined as donepezil, rivastigmine, galantamine, and memantine
  3. bNumber of diseases included hypertension, diabetes, heart disease, cancer, and Parkinson’s disease
  4. cEducational level was categorized as high (college graduate and higher), middle (middle-school graduate and higher), and low (elementary graduate and lower)
  5. dMarital status was categorized as married and others, including single, widowed, divorced, and others