Table 5.

Human CSF and plasma cystatin C concentrations.

Sample (number of individuals)	Measured concentrationb μmol/L	Reference
CSF (28)a	5.6 ± 1.6	(130)
Plasma (28)a	0.9 ± 0.2	(130)

^aHealthy volunteers, mean age 63.9 ± 6.2 years old, predominately female.

^bValue reported by reference, mean ± SD.