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Table 2 Comparison between osteoporosis patients and normal patients

From: Minimally invasive plate osteosynthesis with dual plating for periprosthetic distal femoral fractures following total knee arthroplasty

Patient parameter BMD < −2.5 (N = 5) BMD ≥ −2.5 (N = 13) Total (N = 18) P
Mean age, (years) 75.4 ± 7.0 74.6 ± 5.7 74.8 ± 5.9 (68–89) 0.809
Bone mineral density(T-score) −3.5 ± 0.48 −1.4 ± 0.8 −2.0 ± 1.2 (−4.3–0.3) < 0.001
Time to bone union (weeks) 15.8 ± 4.6 19.5 ± 11.1 18.4 ± 9.8 (10–51) 0.493
JLETSa 29.6 ± 4.0 40.7 ± 7.7 37.6 ± 8.5 (24–53) 0.008
Varus-valgus angle (degrees) 4.4 ± 3.5 2.7 ± 3.2 3.2 ± 3.3 (−2.9–10.5) 0.347
Shortening, n (%)     0.722b
Yes 0 (0.0) 1 (7.7) 1 (5.6)  
No 5 (4.7) 12 (92.3) 17 (94.4)  
Malunion, n (%)     0.650b
Yes 1 (20.0) 2 (15.4) 3 (16.7)  
No 4 (80.0) 11 (84.6) 15 (83.3)  
  1. Note: Data presented as mean ± standard deviation unless otherwise indicated
  2. aJeju Lower Extremity Trauma Scale (the modified WOMAC), bFisher exact test