Diagnostic category frequencies from two large neurology referral studies
| Diagnostic category | Biggin et al8 percentage n=1951 | Stone et al9 percentage n=3781 | Combined percentage n=5732 |
| Headache (all) | 19.4 | 19.2 | 19.3 |
| Seizure/epilepsy | 14.5 | 13.6 | 13.9 |
| Psychological/functional | 9.7 | 15.5 | 13.5 |
| Peripheral nerve/neuromuscular | 8.5 | 10.5 | 9.8 |
| Movement disorders (all) | 9.2 | 5.9 | 7.0 |
| Spinal disorders | 5.0 | 6.2 | 5.8 |
| Multiple sclerosis/demyelination | 2.2 | 6.7 | 5.1 |
| Syncope/transient loss of consciousness | 5.0 | 4.1 | 4.4 |
| Stroke (all) | 4.7 | 3.4 | 3.9 |
| General medical | 1.5 | 2.4 | 2.1 |
| Dementia | 1.0 | 0.6 | 0.7 |
| Brain tumour | 0.5 | 0.6 | 0.5 |
| Muscle | 0.5 | 0.6 | 0.5 |
| Motor neurone disease | 0.4 | 0.2 | 0.3 |
| Miscellaneous neurological disorders | 13.9 | 10.4 | 11.6 |
| No definite neurological diagnosis | 4.0 | 0.0 | 1.4 |
| Total | 1951 | 3781 | 5732 |