Table 1.

Laboratory blood and CSF data

	Pairs (n)	Venous blood	CSF	P-value
Osmolality (mOsm/kg)	179	283.6±6.5	289.5±6.6	< 0.0001
Chloride ion (mEq/L)	157	104.2±3.0	126.5±3.2	< 0.0001
Total protein (g/dL)	170	6.78±0.56	0.05±0.03	< 0.0001
Albumin (g/dL)	168	4.04±0.49	0.03±0.02	< 0.0001
IgG (mg/dL)	162	1123±335	4.2±2.8	< 0.0001
Glucose (mg/dL)	173	101.7±30.1	61.1±15.0	< 0.0001

Data are expressed as the mean ± SD. The shown P-values are the results of the paired t-test. CSF: Cerebrospinal fluid; IgG: immunoglobulin G; SD: standard deviation.