Table 2.

The diagnostic performance among the three methods of extraction in patients’ urine versus serum samples

Extraction method	Sample		P value
	Urine (No = 20)	Serum (No = 20)
	Mean ± SD	Mean ± SD
Resin	105.3 ± 54.3	61.1 ± 51.2	**0.0001
Phenol chloroform	128.1 ± 68.4	61.0 ± 51.2	**0.0001
Kit	100.9 ± 45.4	58.4 ± 49.2	**0.003

Mann–Whitney test

** P < 0.01 Highly significant (HS)