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Table 2 Patient background and the classification of fracture type

From: Artificial intelligence improves the accuracy of residents in the diagnosis of hip fractures: a multicenter study

  Gamagori City Hospital Tsushima City Hospital Nagoya Daini Red Cross Hospital Overall P-value
Mean age at time of injury (95% CI) 81.8 (70.4, 93.2) 81.4 (70.9, 91.9) 80.1 (67.6, 92.6) 81.1 (69.6, 92.6) < 0.001*
Sex (male/female) 340/1156 287/829 566/1673 1193/3658 0.13
Fracture type Garden (I,II/III,IV) 275/450 191/324 528/897 994/1671 < 0.001*
AO31- (A1/A2/A3) 489/253/54 383/185/48 509/322/76 1381/760/178 0.09
Greater trochanteric fracture 96 74 88 258 < 0.001*
Number of X-rays 1617 1205 2420 5242  
Complications Pathologic fractures due to tumors 3 2 7 12 0.80
Osteoarthritis of the hip 26 15 43 84 0.50
Hip implants on the opposite side 132 125 195 452 0.05
Spine implants 7 4 35 46 < 0.001*
Complicated pubic or sciatic fracture 23 17 53 93 0.12
  1. Age at injury and fracture type were evaluated for each fracture site when there were multiple images in bilateral cases
  2. 95%CI 95% confident intervals
  3. * P < 0.05