Table I
Demography of patients and select pre-operative markers.
| Variable (units) | Average (SD) |
|---|---|
| Age (years) | 62.64 (10.28) |
| Male: Female (%) | 50.8%: 49.2% |
| TKA: THA (%) | 50.8%: 49.2% |
| Baseline BMI (kg/m2) | 34.84 (7.56) |
| Baseline Weight (kg) | 98.22 (25.81) |
| Baseline LBM (kg) | 58.07 (14.41) |
| Baseline DLM (kg) | 15.67 (3.67) |
Figure 1
Comparison of means of change in dry lean mass (DLM) and procedure from the pre-operative scan on the day of surgery to postoperative day 0 (POD0) and day 1 (POD1) for total hip and knee arthroplasty. *Denotes standard deviation
Table IIa
The three most utilized metallic knee prostheses used during the study period. Note, femoral (F) and tibial (T) components were matched in all patients.
Figure 2
Comparison of means of change in dry lean mass (DLM) and scanning position from the pre-operative scan on the day of surgery to post-operative day 0 (POD0) and day 1 (POD1). *Denotes standard deviation
Table III
The results of the paired t-test between changes in dry lean mass (DLM) and lean body mass (LBM) at different peri-operative time points. Separate analyses by positioning (supine and seated – left side; supine – right side) are included.
| Supine and Seated N = 67 | Mean (SD) | 95% CL SD | t | P | Supine N = 47 | Mean (SD) | 95% CL SD | t | P | |
|---|---|---|---|---|---|---|---|---|---|---|
| LBM (kg) | DOS to POD0 | 1.67 (2.35) | 2.01, 2.83 | 5.81 | <0.0001 | DOS to POD0 | 1.30 (2.14) | 1.78, 2.68 | 4.21 | <0.001 |
| DOS to POD1 | 1.82 (2.55) | 2.18, 3.08 | 5.82 | <0.0001 | DOS to POD1 | 1.16 (2.19) | 1.82, 2.74 | 3.67 | <0.001 | |
| POD0 to POD1 | 0.15 (2.42) | 2.06, 2.91 | 0.51 | 0.614 | POD0 to POD1 | -0.14 (2.51) | 2.08, 3.14 | -0.39 | 0.701 | |
| DLM (kg) | DOS to POD0 | 0.45 (0.67) | 0.58, 0.81 | 5.53 | <0.0001 | DOS to POD0 | 0.36 (0.61 | 0.51, 0.76 | 4.08 | <0.001 |
| DOS to POD1 | 0.49 (0.72) | 0.62, 0.87 | 5.53 | <0.0001 | DOS to POD1 | 0.32 (0.64) | 0.53, 0.79 | 3.41 | <0.001 | |
| POD0 to POD1 | 0.03 (0.70) | 0.59, 0.84 | 0.38 | 0.705 | POD0 to POD1 | -0.04 (0.71) | 0.59, 0.89 | -0.42 | 0.679 | |