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Table 3 Comparison of the incidence of femoral head necrosis, femoral neck nonunion, and shortening among the three groups

From: Clinical observation and finite element analysis of cannulated screw internal fixation in the treatment of femoral neck fracture based on different reduction quality

Groups Femoral head necrosis (%) Femoral neck nonunion (%) Femoral neck shortening (%)
Yes No Yes No Mild Moderate severe
Anatomical reduction group (n = 82) 11 (13.4) 71 (86.6) 3 (3.7) 79 (96.3) 3 2 1
Negative buttress group (n = 62) 20 (32.2) 42 (67.7) 8 (12.9) 54 (87.1) 8 6 3
Positive buttress group (n = 78) 12 (5.4) 66 (84.6) 2 (2.6) 76 (97.4) 2 2 2
P value 0.006 0.02 < 0.001