Performance of the calcium volume test determining a stenosis degree of ≥40%a
| Calcium Volume Threshold = 0.03 mL | Calcium Volume Threshold = 0.09 mL | |||||
|---|---|---|---|---|---|---|
| Symptomatic | Asymptomatic | All | Symptomatic | Asymptomatic | All | |
| Sensitivity | 63% (49%–74%) | 66% (50%–79%) | 64% (54%–73%) | 48% (36%–61%) | 45% (30%–60%) | 47% (37%–57%) |
| Specificity | 73% (43%–90%) | 48% (35%–61%) | 52% (40%–64%) | 73% (43%–90%) | 83% (71%–91%) | 82% (70%–89%) |
| PPV | 92% (79%–97%) | 47% (34%–60%) | 66% (56%–75%) | 90% (74%–97%) | 65% (46%–81%) | 79% (66%–87%) |
| NPV | 28% (15%–46%) | 67% (51%–79%) | 50% (38%–62%) | 22% (11%–37%) | 68% (56%–78%) | 51% (42%–61%) |
a The test was performed for a calcium-volume threshold of 0.03 mL (left) and 0.09 mL The 95% confidence interval is given in parentheses.