Table 6. Weights assigned to the HEART variables by the five ChatGPT-4 models.
| HEART | MODEL 2.1 | MODEL 2.2 | MODEL 2.3 | MODEL 2.4 | MODEL 2.5 | |
|---|---|---|---|---|---|---|
| Slightly suspicious history | 0.00 | 0.43 | 0.00 | 0.41 | 0.47 | 0.00 |
| Moderately suspicious history | 1.00 | 1.29 | 1.25 | 1.22 | 1.41 | 1.25 |
| Highly suspicious history | 2.00 | 2.14 | 2.50 | 2.03 | 2.34 | 2.50 |
| Normal ECG | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Nonspecific repolarization | 1.00 | 0.86 | 1.04 | 0.81 | 0.94 | 1.04 |
| Significant ST changes | 2.00 | 1.71 | 2.08 | 2.03 | 1.88 | 2.08 |
| Age under 45 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Age 45 to 64 | 1.00 | 0.86 | 0.63 | 0.81 | 0.94 | 0.83 |
| Age over 64 | 2.00 | 1.71 | 1.25 | 1.62 | 1.41 | 1.67 |
| No known risks | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| One or two risk factors | 1.00 | 0.86 | 0.83 | 0.81 | 0.94 | 0.63 |
| Three or more risk factors | 2.00 | 1.71 | 1.67 | 1.62 | 1.88 | 1.25 |
| Normal troponin | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Troponin 1-3x normal | 1.00 | 1.29 | 1.25 | 1.22 | 0.94 | 1.25 |
| Troponin > 3x normal | 2.00 | 2.14 | 2.50 | 2.43 | 1.88 | 2.50 |
| Total | 15 | 15 | 15 | 15 | 15 | 15 |
Although not statistically different, the five ChatGPT-4 models assigned different weights to each HEART variable.