Table 3.
Predicted Risk of CHD Events Using a Multivariate Risk Prediction Model With and Without Inclusion of ECG Dataa
| Model With ECG |
|||||
|---|---|---|---|---|---|
| Model Without EGC | Frequency, % |
Rate Reclassified, %b | |||
| <7.5 | 7.5–<15.0 | ≥15.0 | Total | ||
| Participants who experience a CHD event, % | |||||
| <7.5 | 4 | 2 | 0 | 6 | |
|
| |||||
| 7.5–<15.0 | 7 | 91 | 27 | 125 | |
|
| |||||
| ≥15.0 | 0 | 25 | 195 | 220 | |
|
| |||||
| Total | 11 | 118 | 222 | 351 | −0.9 |
|
| |||||
| Participants who do not experience a CHD event, % | |||||
| <7.5 | 74 | 17 | 0 | 91 | |
|
| |||||
| 7.5–<15.0 | 129 | 678 | 149 | 956 | |
|
| |||||
| ≥15.0 | 0 | 189 | 605 | 794 | |
|
| |||||
| Total | 203 | 884 | 754 | 1841 | 8.3 |
Abbreviations: CHD, coronary heart disease; ECG, electrocardiographic.
a
Net reclassification improvement (sum of the percentages of correctly reclassified participants with and without CHD events): 7.4%; 95% CI, 3.1%–19.0%. Identification discrimination improvement: 0.99%; 95% CI, 0.32%–2.15%.
b
Proportion of all participants who were “correctly” reclassified minus the proportion of each group reclassified in the “wrong” direction.