Version June 2024
| Variable | Kroenke, et al 1992 | Drachman and Hart 1972 | Nedzelski, et al 1986 | Herr, et al 1989 |
| Primary care | Dizziness clinic | Dizziness clinic | Emergency room | |
| Patients | 100 | 102 | 2222 | 125 |
| Average age | 46 | - | 48 | 47 |
| Cause, percent | ||||
| Vertigo | 54 | 46 | 45 | 50 |
| Benign positional vertigo | 16 | 12 | 17 | - |
| Vestibular neuronitis | 4 | 4 | 10 | 1 |
| Other vestibular | 10 | 9 | 6 | - |
| Central | 10 | 7 | 4 | 7 |
| Migraine | 1 | - | - | - |
| Nonspecific | 10 | 10 | - | - |
| Psychiatric disorder | 16 | 9 | 21 | 11 |
| Presyncope | 6 | 4 | - | 14 |
| Disequilibrium | 2 | 16 | - | 1 |
| Hyperventilation | 1 | 23 | - | 5 |
| Multicausal | 13 | 12 | - | - |
| Unknown | 8 | 9 | 19 | 10 |
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