Table 4.
Sensitivity and specificity for the detection of coronary stenoses exceeding 50% with electron beam computed tomographic coronary angiography (EBCTA) and multislice computed tomographic coronary angiography (MSCTA)
| Sensitivity | Specificity | |||||||
| EBCTA | MSCTA | EBCTA | MSCTA | |||||
| Segment | n* | % (95% CI) | n* | % (95% CI) | n† | % (95% CI) | n† | % (95% CI) |
| 1 | 7/8 | 88% (47% to 100%) | 11/13 | 85% (55% to 98%) | 59/67 | 88% (80% to 97%) | 58/62 | 94% (85% to 98%) |
| 2 | 5/10 | 50% (19% to 81%) | 4/6 | 67% (22% to 96%) | 58/62 | 94% (84% to 98%) | 47/50 | 94% (83% to 99%) |
| 3 | 2/3 | 67% (9% to 99%) | 1/1 | 100% (45% to 100%) | 49/50 | 98% (89% to 100%) | 59/61 | 97% (89% to 100%) |
| 5 | 4/5 | 80% (28% to 99%) | 4/5 | 80% (28% to 99%) | 80/82 | 98% (89% to 100%) | 78/79 | 99% (93% to 99%) |
| 6 | 16/17 | 94% (71% to 99%) | 20/23 | 87% (66% to 97%) | 59/64 | 92% (91% to 100%) | 51/55 | 93% (82% to 98%) |
| 7 | 18/19 | 95% (74% to 100%) | 18/20 | 90% (68% to 99%) | 54/62 | 87% (76% to 94%) | 52/55 | 95% (85% to 99%) |
| 8 | 4/8 | 50% (16% to 84%) | 5/5 | 100% (47% to 100%) | 59/65 | 91% (81% to 97%) | 70/73 | 96% (88% to 99%) |
| 11 | 8/12 | 67% (34% to 90%) | 8/12 | 67% (34% to 90%) | 60/67 | 90% (80% to 96%) | 64/66 | 97% (90% to 100%) |
| 11 distal | 0/1 | – | 1/3 | 33% | 59/60 | 98% (91% to 100%) | 60/64 | 94% (84% to 98%) |
| Total | 64/83 | 77% (67% to 86%) | 72/88 | 82% (72% to 89%) | 537/579 | 93% (90% to 95%) | 539/565 | 96% (94% to 97%) |
*Sensitivity, number detected/number present on coronary angiography; †specificity, number excluded/number not present on coronary angiography.
Differences between EBCTA and MSCTA are not significant in any segment.
CI, confidence interval.