TABLE 5.
Comparison of FRAPPE vessel wall measurements between high and low atherosclerosis risk groups
| Variable | Risk Group |
Difference |
|||||
|---|---|---|---|---|---|---|---|
| High (N = 50) | Low (N = 50) | Mean | (95% CI) | P-value | AUC | (95% CI) | |
| Mean wall thickness, mm | 0.82 ± 0.08 | 0.76 ± 0.06 | 0.06 | (0.02, 0.10) | 0.004 | 0.71 | (0.57, 0.84) |
| Max wall thickness, mm | 1.97 ± 0.56 | 1.57 ± 0.43 | 0.40 | (0.16, 0.63) | 0.002 | 0.73 | (0.60, 0.85) |
| Mean eccentricity ratio | 1.47 ± 0.20 | 1.34 ± 0.15 | 0.13 | (0.04, 0.22) | 0.005 | 0.79 | (0.68, 0.89) |
| Mean wall area, mm2 | 17 ± 4 | 16 ± 4 | 1.2 | (−0.9, 3.3) | 0.25 | 0.60 | (0.44, 0.75) |
| Mean lumen area, mm2 | 27 ± 8 | 28 ± 11 | −1.0 | (−6.3, 4.2) | 0.72 | 0.50 | (0.34, 0.67) |
| Mean total vessel area, mm2 | 45 ± 12 | 44 ± 15 | 0.2 | (−7.1, 7.3) | 0.95 | 0.53 | (0.37, 0.69) |
| Mean normalized wall index, % | 39 ± 3 | 38 ± 4 | 1.7 | (−0.2, 3.5) | 0.073 | 0.65 | (0.49, 0.79) |
| Max normalized wall index, % | 49 ± 6 | 46 ± 7 | 2.9 | (−0.5, 6.2) | 0.091 | 0.64 | (0.49, 0.77) |
Abbreviations: AUC, area under the receiver operating characteristic curve; CI, confidence interval; FRAPPE, fully automated and robust analysis technique for popliteal artery evaluation.