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Table 2 Age adjusted univariate and multivariate logistic regression analysis demonstrating institutionalization at 1 year after hip fracture

From: Does cognitive/physical screening in an outpatient setting predict institutionalization after hip fracture?

   Age-adjusted univariate n = 584    Multivariate n = 472  
Variable n OR (95 % CI) P n OR (95 % CI) P
Living arrangements at 1 months
 Own home or assisted living accommodation 260 1.00    219 1.00   
 Institution a 324 3.81 (2.34–6.16) <0.001 253 1.56 (0.67–3.63) 0.304
Living arrangements at 4 months
 Own home or assisted living accommodation 463 1.00    393 1.00   
 Institution a 121 33.24 (19.39–56.00) <0.001 79 16.26 (7.37–35.86) <0.001
IADL 487 2.54 (2.00–3.22) <0.001     
 5–8 199 1.00    197 1.00   
 0–4 288 73.11 (10.03–532) <0.001 275 12.96 (1.62–103.9) 0.016
MMSE   1.22 (1.16–1.27) <0.001     
 20–30 305 1.00    197 1.00   
 0–19 180 9.00 (4.93–16.43) <0.001 175 4.19 (1.82–9.66) 0.001
Age         
 65–74 87 1.00    78 1.00   
 75–85 268 3.49 (1.45–8.41) 0.005 221 1.12 (0.31–4.11) 0.865
  > 85 229 5.47 (2.27–13.14) <0.001 173 1.29 (0.35–4.71) 0.915
Mobility aids before fracture
 Mobile without an aid 258 1.00       
 Mobile with an aid 320 1.23 (0.78–1.89) 0.360     
 Unable to ambulate 6 5.03 (0.93–27.14) 0.061     
Mobility level before fracture
 Unassisted outdoors 393 1.00    343 1.00   
 Assisted outdoors 63 6.18 (3.41–11.21) <0.001 46 1.39 (0.53–3.65) 0.510
 Unassisted indoors 108 4.27 (2.56–7.11) <0.001 68 0.93 (0.37–2.34) 0.879
 Assisted indoors 13 8.23 (2.61–25.98) <0.001 8 0.96 (0.14–6.53) 0.968
 Unable to move 7 12.04 (2.53–57.23) 0.002 7 0.89 (0.11–7.04) 0.914
Previous living arrangements
 Own home 298 1.00    256 1.00   
 Own home with organized home care 193 2.74 (1.65–4.55) <0.001 153 1.14 (0.48–2.76) 0.764
 Assisted living accommodation 98 6.16 (3.51–10.81) <0.001 63 1.17 (0.40–3.40) 0.777
Living with somebody
 Yes 325 1.00    253 1.00   
 No 259 0.51 (0.34–0.78) 0.002 219 0.79 (0.33–1.87) 0.589
ASA grade
 1–2 95 1.00    79 1.00   
 3 386 2.87 (1.32–6.20) 0.008 319 1.14 (0.33–3.97) 0.834
 4–5 99 2.10 (0.86–5.12) 0.103 74 0.24 (0.05–1.13) 0.071
Medications on admission
  < 4 medicine 135 1.00    108 1.00   
 4–10 medicine 366 1.76 (1.03–3.03) 0.040 297 1.01 (0.38–2.69) 0.991
  > 10 medicine 83 2.06 (1.03–4.12) 0.041 67 1.72 (0.48–6.18) 0.406
Previous fracture of any bone
 Yes 182 1.00       
 No 402 0.93 (0.60–1.43) 0.732     
Gender
 Female 456 1.00       
 Male 128 0.94 (0.59–1.63) 0.871     
Hip fracture type
 Femoral neck fracture 380 1.00       
 Pertrochanteric fracture 180 0.95 (0.61–1.47) 0.819     
 Subtrochanteric fracture 24 1.05 (0.37–2.97) 0.930     
  1. aInstitution represents hospital, health care center hospital, nursing home, or rehabilitation unit providing 24-h care
  2. Instrumental Activities of Daily Living (IADL), Mini Mental State Examination (MMSE), and American Society of Anesthesiologists (ASA) score. Results are shown as odds ratios (OR) with 95 % confidence intervals (CI). Statistically significant age adjusted variables from univariate logistic regression analysis were admitted to multivariate regression analysis