| Variable | Derivation cohort (n = 260) | Validation cohort (n = 256) | p Value |
| Age, mean (SD) | 63 (21) | 63 (22) | |
| Male | 156 (60) | 121 (47) | 0.005 |
| Structural heart disease* | 77 (30) | 73 (29) | |
| Abnormal ECG* | 111 (43) | 89 (35) | |
| No of syncopal episodes, mean (SD) | 2 (5) | 3 (5) | |
| Injures related to syncope | 75 (29) | 60 (23) | |
| History of presyncope | 51 (20) | 62 (24) | |
| Final diagnosis | |||
| Cardiac syncope | 44 (17) | 35 (14) | |
| Bradyarrhythmic | 21 (8) | 17 (7) | |
| Tachyarrhythmic | 9 (3) | 9 (4) | |
| Mechanical | 14 (5) | 9 (4) | |
| Neurally mediated | 165 (63) | 179 (70) | |
| Vasovagal | 85 (33) | 110 (43) | 0.02 |
| Carotid sinus syncope | 13 (5) | 10 (4) | |
| Situational | 46 (18) | 42 (16) | |
| Single/rare syncope, no heart disease | 21 (8) | 17 (7) | |
| Orthostatic hypotension | 27 (10) | 25 (10) | |
| Non syncopal attacks | 18 (7) | 10 (4) | |
| Unexplained | 5 (2) | 8 (3) |
Results are shown as no (%) unless stated otherwise.
*As defined in the method section.