Table 5.

Sensitivity and specificity of the dermoscopic signs of onychomycosis.

	Onychomycosis	Trauma	Psoriasis	Sensitivity (%)	Specificity (%)
Spikes	141/211	24/147	0/41	66.82	85.64
Longitudinal striae	76/191	24/142	0/6	39.79	83.78
Subungual hemorrhage	17/137	18/120	-	12.41	85
Splinter hemorrhage	6/147	11/96	23/41	4.08	75.18
Onycholysis	31/154	42/129	6/6	20.13	61.9
Ruin appearance	28/157	1/125	0/35	17.83	99.38
Red dots in hyponychium	0/20	0/5	26/35	*	*
Red dots in lateral folds	0/20	0/5	24/35	*	*
Proximal erythematous rim associated with onycholysis	0/37	0/14	26/41	*	*
Plain edges without erythema	0/74	26/27	0/41	**	**
Deep pits and dots	24/74	9/27	14/41	32.43	66.18
Salmon patch	0/20	0/5	9/35	*	*
Subungual hyperkeratosis	5/20	0/5	17/35	25	57.5
Aurora borealis	17/20	0/5	0/35	85	100

^*the sign was only described in patients with psoriasis

^**the sign was only described in association with trauma