Ashy Dermatosis and Lichen Planus Pigmentosus: The Histopathological Differences

Table 1

Baseline characteristics, history, and associated conditions of patients with AD (n = 29) and LPP (n = 71).

	AD, n (%)	LPP, n (%)	value
Baseline characteristics and history of rash
Age at diagnosis (years)
Mean (SD)	42.4 (16.3)	49.6 (13.8)	0.03
Sex
Male (%)	4 (13.8)	17 (23.9)	0.26
Female (%)	25 (86.2)	54 (76.1)
Fitzpatrick skin type, n (%)
III	14 (48.3)	26 (36.2)
IV	14 (48.3)	45 (63.4)	0.13
V	1 (3.5)	0 (0)
Median rash duration before first visit, weeks (range)	26 (0.42–1,040)	24 (0.42–1,612)	0.69
Pruritus, n (%)	4 (13.8)	22 (31.0)	0.08
Burning sensation, n (%)	2 (6.9)	3 (4.2)	0.63
Associated conditions
Concurrent lichen planus, n (%)	0 (0)	1 (1.4)	1.00
Concurrent lichen planopilaris, n (%)	0 (0)	6 (8.5)	0.18
Hypothyroidism, n (%)	3 (10.3)	0 (0)	0.02
Hepatitis B infection, n (%)	0 (0)	4 (5.6)	0.32
Hepatitis C infection, n (%)	0 (0)	2 (2.8)	1.00