Table 3. Test Results and Overall Event Rates by Probability of Minimal Riska.
| Decile | Mean Probability of No Riskb | No. of Patients in Decile | No. of Patients With CCTA Results | CCTA Test Results, No. (%) | CV Death and MI, No. (%)c | ||||
|---|---|---|---|---|---|---|---|---|---|
| Normal | Abnormal | High-Risk Abnormal | Significantly Abnormal | Mildly Abnormal | |||||
| 1 | 0.05 | 458 | 440 | 32 (7.3) | 408 (92.7) | 63 (14.3) | 52 (11.8) | 293 (66.6) | 17 (3.7) |
| 2 | 0.09 | 459 | 441 | 51 (11.6) | 390 (88.4) | 47 (10.7) | 42 (9.5) | 301 (68.3) | 6 (1.3) |
| 3 | 0.13 | 459 | 449 | 79 (17.6) | 370 (82.4) | 43 (9.6) | 29 (6.5) | 298 (66.4) | 8 (1.7) |
| 4 | 0.17 | 458 | 454 | 100 (22.0) | 354 (78.0) | 29 (6.4) | 34 (7.5) | 291 (64.1) | 9 (2.0) |
| 5 | 0.21 | 459 | 451 | 129 (28.6) | 322 (71.4) | 28 (6.2) | 19 (4.2) | 275 (61.0) | 5 (1.1) |
| 6 | 0.25 | 459 | 453 | 165 (36.4) | 288 (63.6) | 17 (3.8) | 24 (5.3) | 247 (54.5) | 5 (1.1) |
| 7 | 0.29 | 458 | 451 | 173 (38.4) | 278 (61.6) | 14 (3.1) | 27 (6.0) | 237 (52.5) | 5 (1.1) |
| 8 | 0.35 | 459 | 452 | 219 (48.5) | 233 (51.5) | 8 (1.8) | 18 (4.0) | 207 (45.8) | 4 (0.9) |
| 9 | 0.42 | 459 | 451 | 253 (56.1) | 198 (43.9) | 8 (1.8) | 11 (2.4) | 179 (39.7) | 3 (0.7) |
| 10 | 0.54 | 458 | 453 | 297 (65.6) | 156 (34.4) | 7 (1.5) | 10 (2.2) | 139 (30.7) | 1 (0.2) |
Abbreviations: CCTA, coronary computed tomography angiography; CV, cardiovascular; MI, myocardial infarction.
a
Patients without a test result were excluded for model application purposes.
b
Final model formula for calculating minimal risk: 1/(1 + exp [−1.783 + age (0.084) + sex (female) (−1.026) + ethnicity (yes) (−0.142) + tobacco (never) (−0.526) + diabetes (no) (−0.314) + dyslipidemia (no) (−0.412) + family history of coronary artery disease (no) (−0.309) + hypertension (no) (−0.408) + stress (no) (−0.309) + stress (unknown) (−0.195) + high-density lipoprotein cholesterol (−0.006)]). cMedian follow-up of 25 months.