Markers of activity and serological status in the neurosyphilis group
| n | Positive (n(%)) | Significant value (n(%)) | Mean (range) | |
|---|---|---|---|---|
| Significant value: VDRL titre >1:8, protein >0.8 g/l, cell count >25/ml, IgG index >1. | ||||
| FTA-abs, fluorescent treponema antibody test-absorption; RPR, rapid plasma reagin; VDRL, venereal disease research laboratory | ||||
| Serum VDRL | 108 | 106 (98) | 89 (84) | 126 (2 to 512) |
| Serum RPR | 48 | 46 (96) | 40 (87) | 149 (1 to 1024) |
| Serum FTA-abs | 72 | 72 (100) | – | – |
| CSF VDRL | 149 | 109 (73) | 19 (13) | 8.6 (1 to 64) |
| CSF protein | 150 | 123 (82) | 79 (53) | 0.98 (0.12 to 10.0) |
| CSF cell count | 156 | 118 (76) | 76 (49) | 60 (0 to 1022) |
| CSF IgG index | 85 | 77 (91) | 58 (68) | 2.41 (0.21 to 13.97) |