Table 3:

Comparison of Snapper results with Nurse2 results

Symptom Category	Specificity	Accuracy	Precision/+ve predictive value	Recall/Sensitivity	F-score
Chest Pain	99.3%	97.7%	91.8%	80.0%	0.9
Abdominal Pain	99.3%	89.9%	86.8%	30.6%	0.5
Dysponea	99.7%	96.5%	92.0%	46.9%	0.6
Trauma	91.2%	86.9%	20.7%	30.4%	0.2