Table V.

Statistical correlations between serum related-purine derivatives and PASI score.

	<7		7–12		>12
Items	r	p	r	p	r	p
ADA	0.094	0.353	0.137	0.062	0.498	0.004
XO	0.103	0.281	0.095	0.413	0.601	<0.001
UA	0.087	0.988	0.105	0.243	0.421	0.017
8-OHdG	0.122	0.078	0.406	0.008	0.782	<0.001

ADA, adenosine deaminase; XO, xanthine oxidase; UA, uric acid; 8-OHdG, 8-hydroxy-deoxy-guanosine; PASI, psoriasis area and severity index.