Table 2. The Associations of Alarm Features and Upper Gastrointestinal Malignancies.
| Patients with alarm features | Patients with upper GI malignancies and alarm features | Patients without alarm features | Patients with upper GI malignancy but no alarm features | Sensitivity | Specificity | Positive predictive value | Negative predictive value | |
|---|---|---|---|---|---|---|---|---|
| Gastrointestinal bleeding | 173 | 20 | 3,753 | 62 | 0.24 | 0.96 | 0.12 | 0.98 |
| Body weight loss | 115 | 24 | 3,811 | 58 | 0.29 | 0.98 | 0.21 | 0.98 |
| Dysphagia | 18 | 12 | 3,908 | 70 | 0.15 | 0.99 | 0.67 | 0.98 |
| At least one alarm feature | 290 | 50 | 3,636 | 32 | 0.61 | 0.94 | 0.17 | 0.99 |
Sixteen patients had more than one alarm features.