Table 8. Standard deviations of the repeatability and within-lab precision for the assay of NFL concentrations in PBS using the IMR NFL reagent.

The samples used show mean measured NFL concentrations of 1.00 pg/ml and 100.17 pg/ml. The coefficient of variation is the ratio of the standard deviation and the mean of the measured NFL concentrations.

Material	Mean of measured NFL concentrations	Standard deviation (Coefficient of variation)
		Repeatability	Within-lab precision
NFL-PBS sample 1	1.00 pg/ml	0.027 pg/ml (2.67%)	0.019 pg/ml (1.89%)
NFL-PBS sample 2	100.17 pg/ml	0.528 pg/ml (0.53%)	1.313 pg/ml (1.31%)