Table 2.
Cerebrospinal fluid and serum characteristics
| Variables | N total | Mean | s.d. |
|---|---|---|---|
| CSF | |||
| Albumin (g/L) | 121 | 00.24 | 00.12 |
| IgG (g/L) | 121 | 00.03 | 00.02 |
| Protein level (mg/dL) | 119 | 36.53 | 12.94 |
| Number of cells (per μL) | 121 | 1.40 | 1.25 |
| Frequency | |||
| Elevated number of cells (≥5 per μL) | 121 | ||
| Yes | 3 (2.5%) | ||
| No | 118 (97.5%) | ||
| Mean | s.d. | ||
| Serum | |||
| Albumin (g/L) | 120 | 44.83 | 4.00 |
| IgG (g/L) | 120 | 10.02 | 1.97 |
| Mean | s.d. | ||
| CSF/serum ratios | |||
| Albumin quotient (CSF/serum) | 120 | 5.35 | 2.22 |
| IgG ratio (CSF/serum) | 120 | 2.81 | 2.54 |
| Frequency | |||
| Elevation age-dependent | 121 | ||
| Yes | 019 (15.7%) | ||
| No | 101 (83.5%) | ||
| Not specified | 001 (00.8%) | ||
| OCBsa | 121 | ||
| No OCBs/type 1 | 59 (48.8%) | ||
| OCBs type 2 | 03 (02.5%) | ||
| OCBs type 3 | 10 (08.3%) | ||
| OCBs type 4 | 14 (11.6%) | ||
| OCBs type 5 | 0 (0%) | ||
| Not determined | 35 (28.9%) | ||
CSF, cerebrospinal fluid; IgG, immunoglobulin G; OCB, oligoclonal band.
a.
Five types of OCB patterns were proposed: type 1, normal CSF; type 2, two or more CSF-restricted OCBs; type 3, CSF-restricted OCBs and additional, identical OCBs in serum and CSF; type 4, identical OCBs in CSF and serum, ‘mirror pattern’; type 5, monoclonal bands in CSF and serum.