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Table 1 Comparison of demographic characteristics of the intervention and non-Intervention groups

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

  Control (n = 274) Intervention (n = 275) P Values
Demographic
 Age (years) 73.6 (6.2) 73.8 (6.3) 0.660
 Age ≥ 70 190 (69.3%) 197 (71.6%) 0.556
 Age ≥ 80 43 (15.7%) 49 (17.8%) 0.505
 Sex (male/female) 78/196 85/190 0.531
 Body mass index (kg/m2) 25.0 (3.6) 25.6 (5.9) 0.188
 ASA classa 2.06 (0.6) 2.16 (0.598) 0.050
 Number of medications 5.3 (4.1) 5.3 (4.1) 0.953
 Existence of dementia medicationb 7 (2.6%) 6 (2.2%) 0.774
 Number of diseasesc 1.11 (0.79) 1.13 (0.90) 0.728
 Type of anesthesia (general/others) 148/126 144/131 0.698
Educational leveld
 (High/Middle/Low) 58/124/92 52/130/93 0.684
 Living situation (home/institutionalization) 272/2 272/3 1.000
 Marital status (married/others) e 204/70 197/78 0.457
Operation site 0.301
 Spine 74 (27.0%) 67 (24.4%)  
 Knee 62 (22.6%) 76 (27.6%)  
 Hip 59 (21.5%) 58 (21.1%)  
 Shoulder 27 (9.9%) 40 (14.5%)  
 Others 52 (19.0%) 34 (12.4%)  
Outcomes
 Hospital stay (days) 9.1 (9.6) 8.0 (8.1) 0.167
 In-hospital mortality 5 (1.8%) 1 (0.4%) 0.123
 ICU admission 10 (3.6%) 6 (2.2%) 0.325
 Discharge site (home/others) 212/57 228/46 0.191
  1. Data are presented as mean (SD) or number (%)
  2. ASA indicates American Society of Anesthesiologists
  3. aData were missing for 71 patients
  4. bDementia medication was defined as donepezil, rivastigmine, galantamine, and memantine
  5. cNumber of diseases included hypertension, diabetes, heart disease, cancer, and Parkinson’s disease
  6. dEducational level was categorized as high (college graduate and higher), middle (middle-school graduate and higher), and low (elementary graduate and lower)
  7. eMarital status was categorized as married and others, including single, widowed, divorced, and others