Table 1.

Comparison of electrochemical immunosensor and the enzyme-linked immunosorbent assays (ELISA) method for the determination of ProGRP in serum samples.

Sample	Addition	ELISA	Proposed Sensor
1	1 ng/mL	0.97 ng/mL	0.98 ng/mL
2	2 ng/mL	1.72 ng/mL	1.94 ng/mL
3	5 ng/mL	Out of detection range	4.88 ng/mL