Table 1.
Sensitivity, specificity, and positive and negative predictive values (PPV and NPV, respectively) of computer-assisted analysis compared with manual analysis reported (values reported as per cent values). Rows are conditions identified by the software and columns correspond to manual classification.
| Category | Manuala | Sensitivity | Specificity | PPVb | NPVc | F | ||
| C-Ad | + | − | ||||||
| NSAIDse | ||||||||
| + | 1128 | 19 | 99.8 | 99.9 | 98.3 | 100 | 99.0 | |
| − | 2 | 16410 | ||||||
| Colic | ||||||||
| + | 226 | 13 | 100 | 99.9 | 94.6 | 100 | 100 | |
| − | 0 | 17322 | ||||||
| RFf | ||||||||
| + | 22 | 0 | 100 | 100 | 100 | 100 | 100 | |
| − | 0 | 17539 | ||||||
| RDCg | ||||||||
| + | 7 | 0 | 100 | 100 | 100 | 100 | 100 | |
| − | 0 | 17554 | ||||||
a+/− in the “manual” column identifies the number of positive and negative terms classified manually in each category (Colic, nonsteroidal antiinflammatory drugs [NSAIDs], renal failure [RF], and right dorsal colitis [RDC]).
bPPV: positive predictive values.
cNVP: negative predictive values.
dThe +/− in the “C-A” column identifies the number of positive and negative terms classified with the computer-assisted method for each category.
eNSAIDs: nonsteroidal antiinflammatory drugs.
fRF: renal failure.
gRDC: right dorsal colitis.