Official Journal of the Italian Society of Orthopaedics and Traumatology
Table 3 Changes in bone mineral density (BMD) of the distal femur around the revision total knee arthroplasty (rTKA)
BMD (g/cm2) | ∆ BMD (%) | P value | ∆ BMD (%) | P value | ∆ BMD (%) | P value | |
|---|---|---|---|---|---|---|---|
Postoperative | 0–3 months | 0–6 months | 0–12 months | ||||
ROI 1 | |||||||
Mean | 0.848 | 4.5 | 0.03 | 6.0 | 0.01 | 3.4 | 0.07 |
Range | 0.634–1.112 | −5.3 to 16.4 | −3.9 to 15.7 | −3.4 to 10.8 | |||
SD | 0.153 | 5.9 | 5.8 | 4.9 | |||
95% CI | 0.5; 8.5 | 2.1; 9.9 | −0.3; 7.2 | ||||
ROI 2 | |||||||
Mean | 1.014 | 3.1 | 0.06 | 4.1 | 0.03 | 3.4 | 0.12 |
Range | 1.285–1.014 | −5.0 to 9.6 | −4.7 to 16.1 | −7.7 to 14.4 | |||
SD | 0.193 | 4.7 | 5.6 | 5.7 | |||
95% CI | −0.1; 6.2 | 0.4; 7.9 | −1.0; 7.8 | ||||
ROI 3 | |||||||
Mean | 1.236 | 2.2 | 0.03 | 3.5 | 0.02 | 2.8 | 0.27 |
Range | 0.718–1.657 | −3.3 to 5.6 | −1.6 to 11.9 | −9.6 to 15.0 | |||
SD | 0.251 | 2.8 | 4.0 | 6.9 | |||
95% CI | 0.3; 4.0 | 0.80; 6.1 | −2.6–8.1 | ||||
ROI 4 | |||||||
Mean | 0.998 | 3.4 | 0.01 | 4.7 | 0.00 | 4.0 | 0.01 |
Range | 0.641–1.310 | −0.8 to 10.3 | 1.9–9.7 | −0.7 to 10 | |||
SD | 0.184 | 3.7 | 2.9 | 3.1 | |||
95% CI | 0.9; 5.8 | 2.8; 6.6 | 1.5; 6.3 | ||||
ROI 5 | |||||||
Mean | 1.276 | −0.7 | 0.63 | −0.8 | 0.42 | 0.4 | 0.84 |
Range | 0.640–1.988 | −5.6 to 3.9 | −5.3 to 3.9 | −6.7 to 8.3 | |||
SD | 0.352 | 3.7 | 3.0 | 4.8 | |||
95% CI | −3.8; 2.4 | −3.0; 1.4 | −3.7; 4.4 | ||||