Table 1.

Comparison between mean serum levels of S100B protein among psoriatic patients with different clinical variants

	Plaque-type	Erythrodermic	Flexural	Guttate	Total	Control	P-value
	N=14	N=7	N=8	N=11	N=40	N=10
Serum level of S100B (µg/l)	0.15±0.03	0.15±0.04	0.13±0.03	0.16±0.03	0.13±0.06	0.031±0.01	<0.001*

Control vs. erythrodermic: P<0.001*, Control vs. flexural: P<0.001*, Control vs. guttate: P<0.001*, Control vs. plaque-type: P<0.001*, Plaque-type vs. erythrodermic: NS (P=1.000), Plaquetype vs. flexural: NS (P=0.092), Plaque-type vs. guttate: NS (P=0.455), Erythrodermic vs. flexural: NS (P=0.129), Erythrodermic vs. guttate: NS (P=0.522), Flexural vs. guttate: NS (P=0.073). NS: non significant,

^*significant