Experienced allied health professional
| Items (n) | True positives | False positives | True negatives | False negatives | Sensitivity | Specificity | Positive predictive value | Negative predictive value | Accuracy (%) |
| 5* | 46 | 7 | 35 | 6 | 0.88 | 0.83 | 0.87 | 0.85 | 86.2 |
| 4* | 46 | 7 | 35 | 6 | 0.88 | 0.83 | 0.87 | 0.85 | 86.2 |
| 3* | 46 | 7 | 35 | 6 | 0.88 | 0.83 | 0.87 | 0.85 | 86.2 |
| 2* | 48 | 7 | 35 | 4 | 0.92 | 0.83 | 0.87 | 0.90 | 88.3 |
| 1* | 49 | 12 | 30 | 3 | 0.94 | 0.71 | 0.80 | 0.91 | 84.0 |
5* includes all 5 Perrin technique physical signs; 4* includes postural/mechanical disturbances of the thoracic spine, tender Perrin’s point, tender coeliac plexus and dampened cranial flow; 3* includes postural/mechanical disturbances of the thoracic spine, tender Perrin’s point and tender coeliac plexus; 2* includes tender coeliac plexus and postural/mechanical disturbance of the thoracic spine; and 1* includes tender coeliac plexus.