Table 1.

The diagnostic performance of the three methods of extraction using urine versus serum artificially spiked gradients

Parameter		Resin		Phenol chloroform		Kit
		Urine	Serum	Urine	Serum	Urine	Serum
Mean density of PCR product ± SD		149.8 ± 53.9	74.7 ± 58	142.8 ± 42.6	55.2 ± 60.5	132 ± 24.9	93.3 ± 17.2
Samples (n = 6)
Positive		6	5	6	5	6	6
Negative		0	1	0	1	0	0
% of positivity among samples		100	83.4	100	83.4	100	100
P value		*0.042		*0.018		*0.011

Paired t test

* P < 0.05 Significant (S)