Table 3. Agreement between iSense and EVA scanners.
Comparing the absolute and relative means of the three iSense scan measurements (N = 14) and means of the three EVA scan measurements (N = 14), limits of agreement, coefficient of repeatability within methods and uniformity of the data for each section of the lower limb going from 300mm below the mid-patella (0mm) to 180mm above the mid-patella.
| iSense vs. EVA | |||||||
|---|---|---|---|---|---|---|---|
| Sections (mm) | Aver. circ. in mm | Abs. mean diff. in mm (SE) | Rel. mean diff. in % (SE) | 95% Limit of Agreement (Mean ± 1.96SD) | Repeatability Manual/EVA | ||
| Abs. Lower − Abs. Upper (mm) | Rel. Lower − Rel. Upper (%) | Abs. SE (mm)/Rel. SE (%) | |||||
| 180 | 517.0 | -4.2 (2.6) | -0.8 (0.5) | -22.5 − 14.1 | -4.5 − 2.8 | 18.8/0.7 | 6.5/6.0 |
| 150 | 493.1 | -1.9 (3.1) | -0.4 (0.6) | -24.6 − 20.9 | -5.1 − 4.3 | 27.8/1.2 | 7.2/5.3 |
| 120 | 464.2 | 0.3 (2.9) | 0.0 (0.7) | -21.3 − 21.8 | -4.7 − 4.8 | 24.4/1.2 | 9.1/4.8 |
| 90 | 434.6 | 1.7 (2.3) | -0.4 (0.5) | -18.3 − 15.0 | -4.3 − 3.5 | 13.9/0.8 | 8.5/5.3 |
| 60 | 411.5 | -4.0 (1.8) | -1.1 (0.4) | -16.9 − 8.9 | -4.1 − 2.2 | 7.8/0.5 | 5.4/7.1 |
| 30 | 398.3 | -7.6 (1.7) | -1.9 (0.4) | -19.7 − 4.5 | -5.0 − 1.2 | 6.7/0.4 | 7.6/5.6 |
| 0 | 386.1 | -4.3 (1.5) | -1.1 (0.4) | -15.4 − 6.8 | -4.0 − 1.8 | 5.2/0.4 | 8.3/5.9 |
| -30 | 363.0 | -2.7 (1.4) | -0.8 (0.4) | -12.7 − 7.3 | -3.7 − 2.1 | 4.8/0.4 | 5.7/3.6 |
| -60 | 353.1 | -6.8 (1.8) | -1.9 (0.5) | -19.6 − 6.1 | -5.5 − 1.6 | 8.0/0.6 | 8.4/3.0 |
| -90 | 364.2 | -8.3 (1.5) | -2.3 (0.4) | -19.4 − 2.8 | -5.3 − 0.8 | 5.4/0.4 | 9.3/3.5 |
| -120 | 377.6 | -7.9 (1.2) | -2.1 (0.3) | -16.9 − 1.2 | -4.4 − 0.2 | 3.7/0.2 | 6.3/3.8 |
| -150 | 382.1 | -3.6 (1.3) | -0.9 (0.3) | -12.8 − 5.7 | -3.4 − 1.5 | 3.6/0.3 | 7.9/3.8 |
| -180 | 371.2 | 0.2 (1.8) | 0.0 (0.5) | -13.0 − 13.3 | -3.6 − 3.6 | 8.4/0.6 | 7.2/4.7 |
| -210 | 347.2 | 3.4 (2.4) | 1.0 (0.7) | -13.9 − 20.7 | -4.0 − 5.9 | 15.5/1.3 | 7.2/5.2 |
| -240 | 316.9 | 2.8 (2.9) | 0.9 (0.9) | -18.5 − 24.1 | -5.9 − 7.6 | 24.1/2.4 | 7.7/5.3 |
| -270 | 287.8 | 2.9 (3.1) | 1.0 (1.1) | -19.7 − 25.5 | -6.7 − 8.7 | 27.6/3.2 | 6.9/5.0 |
| -300 | 268.1 | 2.1 (2.5) | 0.9 (0.9) | -14.1 − 18.4 | -5.2 − 7.0 | 16.4/2.4 | 10.2/4.8 |
Aver., average; circ., circumference; abs., absolute; diff., difference; SE, 95% confidence interval; rel., relative; iSS, iSense. A positive bias or limits of agreement indicates that measurements from iSense scanner overestimates the value in respect to EVA scanner.