Morphological risk factors associated with dislocation after bipolar hemiarthroplasty of the hip in patients with femoral neck fractures-a nested case-control study.

In model 3, where depth-to-width ratio (D/W-z) was analyzed instead of depth (D-z), D/W-z showed the same trend as D-z (OR, 0.076; 95CI%, 0.004–1.048; P = 0.084), and additional effects were associated with a P value approaching significance.

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