Identified systemic risk factors
| Risk factor | No | % |
|---|---|---|
| Diabetes | 21 | 11.1 |
| Cerebrovascular accident (CVA) | 17 | 8.9 |
| Rheumatoid arthritis | 14 | 7.4 |
| Connective tissue disease | 7 | 3.7 |
| Dementia | 7 | 3.7 |
| Myeloproliferative | 5 | 2.6 |
| Chronic alcoholism | 4 | 2.1 |
| Severe malnourishment | 2 | 1.1 |
| Brainstem tumour | 1 | 0.5 |
| At least 1 risk factor | 53 | 27.9 |