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Table 2 Measured preoperative radiographic parameters for the left and right knees and their mean differences for Groups I and II

From: Risk factors and outcomes in asymmetrical femoral component size for posterior referencing bilateral total knee arthroplasty: a matched pair analysis

Parameter Group I Group II P value
Asymmetrical femoral component Symmetrical femoral component
(n = 34) (n = 35)
Rt (mm) Lt (mm) Difference (Each patient) Rt (mm) Lt (mm) Difference (Each patient)
AP femoral canal diameter (A) 28.69 ± 2.55 28.57 ± 2.62 0.50 ± 0.46 28.65 ± 2.35 28.74 ± 2.41 0.53 ± 0.41 0.78
AP femoral condyle diameter (B) 64.34 ± 5.11 64.52 ± 4.62 2.11 ± 1.99 64.79 ± 4.67 65.06 ± 3.01 2.19 ± 1.69 0.87
Anterior femoral offset (C) 7.05 ± 1.75 7.37 ± 1.71 1.21 ± 0.95 6.67 ± 1.77 6.90 ± 1.86 1.16 ± 1.19 0.84
Posterior femoral offset (D) 27.19 ± 3.97 27.36 ± 4.14 2.14 ± 2.08 27.93 ± 4.30 27.57 ± 4.45 2.17 ± 2.31 0.95
ML femoral condyle diameter 74.88 ± 6.66 74.82 ± 6.00 1.03 ± 1.58 75.42 ± 5.41 75.45 ± 5.53 0.75 ± 0.94 0.38
  1. data analyses were performed with Student’s t-test