San Francisco Syncope Rule³	ROSE risk score⁵	OESIL risk score⁶
Risk factors
Systolic blood pressure < 90 mm Hg Shortness of breath ECG: Nonsinus rhythm or new changes present History of congestive heart failure Hematocrit < 30 percent	Brain natriuretic peptide level ≥ 300 pg per mL (300 ng per L) Bradycardia (≤ 50 beats per minute) Rectal examination shows fecal occult blood Anemia (hemoglobin level < 9.0 g per dL [90.0 g per L]) Chest pain associated with syncope ECG with Q wave (not in lead III) Oxygen saturation ≤ 94 percent on room air	Age > 65 years History of cardiovascular disease Syncope without a prodrome Abnormal ECG findings
Risk groups*
No factors present: 0.3 percent	No factors present: 1.5 percent	0 to 1 factor present (low risk): 0.6 percent
≥ 1 factors present: 15.2 percent	≥ 1 factors present: 16.5 percent	2 to 4 factors present (high risk): 31 percent
Accuracy of score
98 percent sensitive	87 percent sensitive	97 percent sensitive
56 percent specific	66 percent specific	73 percent specific
LR+ = 2.9	LR+ = 2.5	LR+ = 3.6
LR– = 0.03	LR– = 0.2	LR– = 0.11