Table 3.

Sensitivity, specificity, positive and negative likelihood ratio and diagnostic odd ratio of trichoscopic criteria for erythrodermic atopic dermatitis vs erythrodermic psoriasis and erythrodermic cutaneous T-cell lymphoma.

Trichoscopic features	Sensitivity (%)	Specificity (%)	Positive likelihood ratio	Negative likelihood ratio	Diagnostic odds ratio
Numerous pili torti	0	64	0.00	1.57	0.00
Visible anagen bulbs	0	94	0.00	1.06	0.00
8-shaped hairs	0	92	0.00	1.09	0.00
Singular pili torti	0	94	0.00	1.06	0.00
Numerous broken hairs	0	67	0.00	1.50	0.00
Singular broken hairs	25	86	1.80	0.87	2.07
Numerous yellow dots	50	53	1.06	0.95	1.12
Black dots	0	89	0.00	1.13	0.00
Linear perifollicular vessels	5	86	0.36	1.10	0.33
Glomerular perifollicular vessels	10	78	0.45	1.16	0.39
Glomerular regularly distributed vessels	20	22	0.26	3.60	0.07
Dotted vessels	95	83	5.70	0.06	95.00
Arborizing vessels	20	86	1.44	0.93	1.55
Glomerular line arranged vessels	0	39	0.00	2.57	0.00
White thick interfollicular bands	0	75	0.00	1.33	0.00
Patchy hyperpigmentation	0	83	0.00	1.20	0.00
Reddish areas	15	61	0.39	1.39	0.28
Yellow interfollicular scales	95	83	5.70	0.06	95.0
White interfollicular scales	15	11	0.17	7.65	0.02
Follicular spicules-like scales	0	94	0.00	1.06	0.00