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Table 1 Baseline data according to cognitive function in the Norwegian Hip Fracture Register

From: Validation of orthopaedic surgeons’ assessment of cognitive function in patients with acute hip fracture

  Total Cognitive impairment p-value
No Uncertain Yes
Total n (%) 1.474 870 (59.0) 147 (10.0) 457 (31.0)  
Women (%) 1.111 (75.4) 651 (74.8) 100 (68.0) 360 (78.8) 0.026
Mean age (SD) 84.2 (7.9) 82.8 (8.3) 85.4 (7.2) 86.4 (6.8) < 0.001#
Age group (%)      < 0.001*
  < 75 196 (13.3) 153 (17.6) 13 (8.8) 30 (6.6)  
 75–79 181 (12.3) 124 (14.3) 16 (10.9) 41 (9.0)  
 80–84 265 (18.0) 161 (18.5) 25 (17.0) 79 (17.3)  
 85–89 430 (29.2) 239 (27.5) 47 (32.0) 144 (31.5)  
  ≥ 90 402 (27.3) 193 (22.2) 46 (31.3) 163 (35.7)  
ASA class (%)      < 0.001*
 ASA 1 26 (1.8) 26 (3.0) 0 (0) 0 (0)  
 ASA 2 546 (37.0) 392 (45.1) 39 (26.5) 115 (25.2)  
 ASA 3 847 (57.5) 425 (48.9) 102 (69.4) 320 (70.0)  
 ASA 4 52 (3.5) 26 (3.0) 6 (4.1) 20 (4.4)  
Missing ASA 3 (0.2) 1 (0.1) 0 (0) 2 (0.4)  
Fracture type (%)      0.458
 Undisplaced FNF 220 (14.9) 138 (15.9) 20 (13.6) 62 (13.6)  
 Displaced FNF 606 (41.1) 352 (40.5) 62 (42.2) 192 (42.0)  
 Trochanteric fracture 550 (37.3) 319 (36.7) 61 (41.5) 170 (37.2)  
 Subtrochanteric 67 (4.5) 42 (4.8) 4 (2.7) 21 (4.6)  
 Othera 31 (2.1) 19 (2,2) 0 (0) 12 (2.6)  
Primary operation (%)      0.909
 Screw osteosynthesis 230 (15.6) 142 (16.3) 23 (15.6) 65 (14.2)  
 Hemiarthroplasty 598 (40.6) 349 (40.1) 59 (40.1) 190 (41.6)  
 Sliding hip screw 630 (42.7) 367 (42.2) 65 (44.2) 198 (43.3)  
 Otherb 16 (1.1) 12 (1.4) 0 (0) 4 (0.9)  
  1. * = ANOVA # = Pearson’s chi square
  2. ASA American society of anaesthesiologists
  3. FNF Fracture of femoral neck
  4. AO/OTA AO/Orthopaedic Trauma Association
  5. Other afracture types including basocervikal fractures
  6. Other boperation methods including intramedullary nail
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