The proportions of visits at which each tool was applied and the number of INTs attributable, at least in part, to each tool
| Tool | Number of times tool applied N, (% of total number of visits) | Tool applications per patient-year of observation | Number of times tool contributed to INT decision N, (% of contributions per tool application)* | Percentage of total INT decisions to which tool contributed |
|---|---|---|---|---|
| H&P | 916 (100) | 1.02 | 58 (6.3) | 42.0 |
| Echo | 652 (71.2) | 0.73 | 66 (10.1) | 47.8 |
| Holter | 188 (20.5) | 0.21 | 14 (7.4) | 10.1 |
| ECG | 137 (15) | 0.15 | 2 (1.5) | 1.4 |
| MR-CT | 129 (14.1) | 0.14 | 37 (28.7) | 26.8 |
| Stress test | 101 (11) | 0.11 | 11 (10.9) | 8.0 |
*More than one tool may contribute to a decision. Some visits are associated with more than one INT.
Echo, echocardiogram; H&P, history and physical; INT, intervention.