Table 3. Diagnostic accuracy parameters of 320-CTCA.
| Classification | Group | Disease prevalence (%) | Sensitivity (%) | P value | Specificity (%) | P value | Positive predictive value (%) | P value | Negative predictive value (%) | P value | Accuracy (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Per patient, n=107 | Group 1, (HR≤60), n=55 | 69 | 97 (86–100) (37/38) | >0.99 | 88 (64–99) (15/17) | 1.00 | 95 (83–99) (37/39) | 0.96 | 94 (70–100) (15/16) | 0.37 | 96 (85–99) (52/55) |
| Group 2, (HR 60–80), n=52 | 67 | 100 (90–100) (34/34) | 88 (64–99) (15/17) | 95 (81–99) (34/36) | 100 (78–100) (15/15) | 96 (87–100) (50/52) | |||||
| Per vessel, n=428 | Group 1, (HR≤60) n=220 | 28 | 94 (84–98) (58/62) | 0.92 | 91 (86–95) (144/158) | 0.35 | 81 (69–89) (58/72) | 0.32 | 97 (93–99) (144/148) | 0.37 | 92 (87–95) (202/220) |
| Group 2, (HR 60–80), n=208 | 28 | 98 (91–100) (57/58) | 94 (89–97) (137/146) | 86 (76–94) (57/66) | 99 (96–100) (137/138) | 95 (91–98) (198/208) | |||||
| Per segment, n=1,662 | Group 1, (HR ≤60), n=855 | 13 | 89 (81–94) (95/107) | 0.78 | 95 (93–97) (712/748) | 0.54 | 74 (64–80) (95/128) | 0.57 | 98 (97–99) (712/724) | 0.28 | 94 (93–96) (807/855) |
| Group 2, (HR 60–80), n=807 | 13 | 84 (76–90) (90/107) | 96 (94–97) (671/700) | 76 (67–83) (90/119) | 97 (96–99) (671/688) | 94 (92–95) (761/807) |
Diagnostic parameter values represented by parameter percentage and respective 95% confidence intervals with raw numbers for parameter calculation below.