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Manifestations of early and late symptomatic neurosyphilis (Alberta, 1973–March 2017; n=175)
| Manifestation | Early neurosyphilis (n=105) | Late neurosyphilis (n=70) | P value |
| Ocular | 59 (56.2) | 13 (18.6) | <0.001 |
| Cognitive impairment | 20 (19.0) | 39 (55.7) | <0.001 |
| Ataxia | 9 (8.6) | 10 (14.3) | 0.23 |
| Auditory | 10 (9.5) | 2 (2.9) | 0.13 |
| Other* | 30 (28.6) | 22 (31.4) | 0.69 |
*Aphasia, reduced level of consciousness, headache, unspecified neurological symptoms.
