Table 1. Clinical characteristics of patients with prurigo nodularis (total=209).

Clinical feature		Value
Mean age of onset (yr)
	Total	52.96 (15.93)
	Male	55.45 (14.60)
	Female	50.19 (17.00)
Sex
	Male	110 (52.63)
	Female	99 (47.37)
	Male:female	1.1:1
Atopic dermatitis
	Atopic	126 (60.29)
	Non-atopic	83 (39.71)
Treatment response
	Improvement	68 (32.54)*
	No improvement	66 (31.58)
	Follow-up loss	75 (35.89)

Values are presented as mean (standard deviation) or number (%).

^*When 75 patients who were lost to follow-up were excluded, 50.75% clinically improved.