Table 2.

HER2-ECD oncomarker analysis in human serum samples.

Serum sample no	Concentration (ng/mL)		RSD (%)	P value
	Proposed aptasensor	ELISA kit
1	56.3 ± 0.26	59.8 ± 0.25	0.92	< 0.0001
2	28.6 ± 0.34	23.4 ± 0.23	2.4	< 0.0001
3	43.5 ± 0.36	42.7 ± 0.29	1.2	0.63
4	79.8 ± 0.27	81.4 ± 0.20	0.69	0.049 (< 0.05)
5	89.5 ± 0.64	88.8 ± 0.81	0.88	0.69

The results are the average of four independent measurements ± standard error.