Table 1. Demographic features of patients according to histopathologic diagnosis.

Variable	Total patients (n=68)	Melanocytic activation (n=49)	Melanocytic proliferation (n=11)	Subungual melanoma (n=8)	p-value
Age (yr)	35.2±20.1	36.8±18.0	18.7±20.2	48.5±20.4	0.005
Sex					0.153
Male	30 (44.1)	18 (36.7)	7 (63.6)	5 (62.5)
Female	38 (55.9)	31 (63.3)	4 (36.4)	3 (37.5)
Duration of LM (mo)	42.8±64.9	29.0±45.5	22.5±26.1	141.0±99.6	0.016
Comorbidity					-
Diabete	2 (2.9)	0 (0)	0 (0)	2 (25.0)
Hypertension	5 (7.4)	1 (2.0)	1 (9.1)	3 (37.5)
Latent tuberculosis	0 (0)	0 (0)	0 (0)	0 (0)
Renal insufficiency	0 (0)	0 (0)	0 (0)	0 (0)
Chronic hepatitis	0 (0)	0 (0)	0 (0)	0 (0)
Heart disease and stroke	0 (0)	0 (0)	0 (0)	0 (0)
Hyperlipidemia	1 (1.5)	0 (0)	0 (0)	1 (12.5)
Immune suppressing disease	1 (1.5)	1 (2.0)	0 (0)	0 (0)
Immune suppressants	2 (2.9)	2 (4.1)	0 (0)	0 (0)

Values are presented as mean±standard deviation or number (%). LM: longitudinal melanonychia, -: not available.