Table 2.
Performance statistics of the auto-coding program in classifying claims into 8 causation categories.
| Na | Text Only
|
Text+Injury Code
|
|||||||
|---|---|---|---|---|---|---|---|---|---|
| Nb | Sensitivity | Specificity | PPV | Nb | Sensitivity | Specificity | PPV | ||
| All Claims | 800 | 84.1%c | 86.0%c | ||||||
| NOC | 6 | 0 | 0.0% | 100.0% | - | 0 | 0.0% | 100.0% | - |
| MSD | 144 | 148 | 86.8% | 96.5% | 84.5% | 146 | 90.3% | 97.6% | 89.0% |
| STF | 190 | 205 | 90.0% | 94.4% | 83.4% | 214 | 91.6% | 93.4% | 81.3% |
| Violence and other injuries by persons or animals | 13 | 3 | 23.1% | 100.0% | 100.0% | 7 | 30.8% | 99.6% | 57.1% |
| Transportation incidents | 32 | 38 | 75.0% | 98.2% | 63.2% | 39 | 78.1% | 98.2% | 64.1% |
| Fires and explosions | 5 | 4 | 60.0% | 99.9% | 75.0% | 4 | 80.0% | 100.0% | 100.0% |
| Contact with object or equipment | 394 | 393 | 86.5% | 87.2% | 86.8% | 375 | 86.8% | 91.9% | 91.2% |
| Exposure to harmful substances or environment | 15 | 9 | 40.0% | 99.6% | 66.7% | 15 | 60.0% | 99.2% | 60.0% |
| Overexertion and bodily reaction | 1 | 0 | 0.0% | 100.0% | - | 0 | 0.0% | 100.0% | - |
a
Actual number of claims in each causation category.
b
Number of claims predicted by auto-coding program in each category.
c
Overall percent of claims coded correctly by the auto-coding program.