Table 2.
Accuracy, sensitivity and specificity for the Volatile organic compounds for the gastric cancer prediction model.
| Accuracy (AUC) | Sensitivity | Specificity | Negative predictive value | Positive predictive value | |
|---|---|---|---|---|---|
| Propanal | 78.1% | 53.8% | 100.0% | 58.6% | 100% |
| Aceticamide | 75.6% | 61.5% | 88.2% | 60.0% | 88.9% |
| Isoprene | 74.4% | 84.6% | 64.7% | 64.7% | 78.6% |
| 1,3-propanediol | 73.1% | 73.1% | 76.5% | 65.0% | 82.6% |
|
Including
4 VOCs* |
84.2% | 61.5% | 94.1% | 61.5% | 94.1% |
*When a VOC level was higher than its cut-off value, the VOC was defined as positive and a new Receiver Operating Characteristic curve was constructed based on the positivity status of the four VOCs. AUC, Area under curve.