Table 2.

Diagnostic scan and ROC curve results of serum zinc levels in seborrheic dermatitis.

	Diagnostic scan					ROC curve		P
	Cut off	Sensitivity	Specificity	Positive predictive value	Negative predictive value	Area	95% confidence interval
Serum zinc levels (μg/dL)	≤79	58.14	73.17	69.4	62.5	0.623	0.502−0.744	0.044*

*P < 0.05.