Classification statistics for models of organic lower gastrointestinal disease including alarm features
| Predicted | % correct | ||
|---|---|---|---|
| IBS | Organic | ||
| IBS, irritable bowel syndrome. | |||
| Model 1. Alarm features only | |||
| Observed | |||
| IBS | 198 | 16 | 92.5 |
| Organic disease | 45 | 21 | 31.8 |
| Model 2. Other symptoms and risk factors only (non-alarm features) | |||
| Observed | |||
| IBS | 204 | 10 | 95.3 |
| Organic disease | 42 | 24 | 36.4 |
| Model 3. Alarm features adjusted for non-alarm features | |||
| Observed | |||
| IBS | 205 | 9 | 95.8 |
| Organic disease | 32 | 34 | 51.5 |
| Model 4. Model 3 adjusted for Manning criteria (2+ symptoms) | |||
| Observed | |||
| IBS | 203 | 11 | 94.9 |
| Organic disease | 34 | 32 | 48.5 |
| Model 5. Model 3 adjusted for Manning criteria (3+ symptoms) | |||
| Observed | |||
| IBS | 206 | 8 | 96.3 |
| Organic disease | 32 | 34 | 51.5 |
| Model 6. Model 3 adjusted for Manning criteria (4+ symptoms) | |||
| Observed | |||
| IBS | 206 | 8 | 96.3 |
| Organic disease | 31 | 35 | 53.0 |