Table 4.
VMA Performance in CAS Screening Among Different Subgroups
| Subgroups | Sensitivity, % | Specificity, % | Positive predictive value, % | Negative predictive value, % |
|---|---|---|---|---|
| Aged ≥65 y (N=122) | 89 (95% CI, 80–95) | 94 (95% CI, 83–99) | 96 (95% CI, 88–98) | 85 (95% CI, 75–92) |
| Aged <65 y (N=80) | 83 (95% CI, 67–94) | 80 (95% CI, 65–90) | 77 (95% CI, 65–86) | 85 (95% CI, 73–92) |
| Male sex (N=158) | 89 (95% CI, 80–95) | 88 (95% CI, 78–94) | 87 (95% CI, 79–92) | 90 (95% CI, 82–95) |
| Female sex (N=44) | 82 (95% CI, 65–93) | 82 (95% CI, 48–98) | 93 (95% CI, 79–98) | 60 (95% CI, 41–77) |
| Obesity (BMI >25 kg/m2) (N=97) | 87 (95% CI, 73–95) | 90 (95% CI, 79–97) | 89 (95% CI, 77–95) | 89 (95% CI, 79–94) |
BMI indicates body mass index; CAS, carotid artery stenosis; and VMA, video‐based motion analysis.
This analysis was the subgroup analysis of the whole cohort (N=202, including 109 patients with CAS and 93 patients without CAS).