Table 4.
Correlations Between Serum and CSF Levels of Complement Components and the IgM Index
| Serum components | ρ (p value) | CSF components | ρ (p value) |
| Ba (ng/mL) | 0.331 (0.010) | Ba (ng/mL) | 0.348 (0.006) |
| Bb (μg/mL) | 0.404 (0.001) | Bb (μg/mL) | 0.233 (0.070) |
| C3a (ng/mL) | 0.406 (0.001) | C3a (ng/mL) | 0.570 (0.000002) |
| C4a (ng/mL) | 0.283 (0.028) | C4a (ng/mL) | 0.270 (0.035) |
| C5a (ng/mL) | 0.408 (0.001) | C5a (ng/mL) | 0.421 (0.001) |
| Factor H (μg/mL) | −0.064 (0.626) | Factor H (μg/mL) | −0.128 (0.326) |
| Factor I (ng/mL) | 0.001 (0.994) | Factor I (ng/mL) | −0.118 (0.363) |
| SC5b9 (ng/mL) | 0.330 (0.010) | SC5b9 (ng/mL) | −0.090 (0.492) |
| C1q (μg/mL) | −0.119 (0.366) | C1q (μg/mL) | −0.195 (0.133) |
| C3 (μg/mL) | 0.036 (0.787) | C3 (μg/mL) | −0.097 (0.455) |
| C4 (μg/mL) | 0.224 (0.085) | C4 (μg/mL) | −0.389 (0.002) |
| C5 (μg/mL) | −0.179 (0.171) | C5 (μg/mL) | −0.230 (0.074) |
| C3a/C3 ratio | 0.341 (0.008) | C3a/C3 ratio | 0.581 (0.000001) |
| C4a/C4 ratio | −0.087 (0.510) | C4a/C4 ratio | 0.353 (0.005) |
| C5a/C5 ratio | 0.428 (0.001) | C5a/C5 ratio | 0.414 (0.001) |
Data show Spearman correlation coefficients (p values).