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Table 1 AO/OTA-2018 classification of 241 intertrochanteric fractures

From: Comparative outcomes of proximal femur intramedullary nailing vs. cemented bipolar hemiarthroplasty for treating intertrochanteric fractures in patients aged 75 and older: analysis of risk factors for postoperative all-cause mortality

AO/OTA-2018 classification

IF group (n = 120) (%)

LCHA group (n = 121) (%)

31A1-2

20 (16.7%)

24 (19.8%)

31A1-3

20 (16.7%)

16 (13.2%)

31A2-2

35 (29.2%)

43 (35.5%)

31A2-3

23 (19.2%)

34 (28.1%)

31A3-1

1 (0.8%)

0 (0%)

31A3-2

2 (1.6%)

0 (0%)

31A3-3

19 (15.8%)

4 (3.3%)

  1. Note: Frequencies (%)
  2. Abbreviations: AO/OTA, Association for the Study of Interfixation-American Orthopedic Trauma Association; IF, two cephalic screws combined with compression proximal-femur intramedullary nailing internal fixation; LCHA, long-stemmed cemented bipolar hemiarthroplasty
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BMC Surgery

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