Characteristic | All Patients (n = 105) | CSF RPR+ Patients (n = 62) | CSF RPR- Patients (n = 43) | P a |
---|---|---|---|---|
Male sex | 91/105(87%) | 54/62(87%) | 37/43(86%) | 0.876 |
Age, median years (IQR) | 52 (47–58) | 53(47–58) | 52 (47–56) | 0.432 |
MMSE (IQR) | 14(12–17) | 14(12–17) | 14(11–17) | 0.982 |
CSF WBC count | ||||
> 5 cells/μl | 26/89(29%) | 14/46(30%)b | 12/43(28%) | 0.793 |
Median cells/ml (IQR) | 3(1–6) | 3(0.75–6) | 2(1–6) | 0.878 |
CSF protein concentration | ||||
> 45 mg/dl | 73/89(82%) | 34/46(74%)b | 39/43(91%) | 0.039 |
Median mg/dl (IQR) | 62(48–75) | 62.5(45–75.25) | 61(50–75) | 0.577 |
Reactive CSF RPR | 62/105 (59%) | 62/62(100%) | 0/43(0%) | |
Median CSF RPR titer (IQR) | – | 1:2 (1:2–1:4) | – | |
Serum RPR titer | ||||
≥ 1: 32 | 21/108(19%) | 19/62(31%) | 2/43(4.7%) | 0.001 |
1: 16 | 16/108(15%) | 8/62(13%) | 8/43(18.6%) | 0.424 |
1: 1–1: 8 | 68/108(63%) | 35/62(56%) | 33/43(76.7%) | 0.032 |
Median serum RPR titer (IQR) | 1:8(1:4–1:16) | 1:8(1:4–1:32) | 1:4(1:4–1:8) | < 0.001 |
Normalized by final follow-up visit | 14/27(52%) | 6/13(46%)c | 8/14(57%)d | 0.568 |