. Author manuscript; available in PMC: 2011 Aug 23.

Published in final edited form as: Acta Derm Venereol. 2011 Jan;91(1):18–23. doi: 10.2340/00015555-1002

Table I.

Principal demographic characteristics of the study subjects

		Total n		Age, years		Nights studied n	AD n	Psoriasis n	PUC n	Hepatic itch n
		Total n	F:M ratio	Mean	Range	Nights studied n	AD n	Psoriasis n	PUC n	Hepatic itch n
Study 1	Child subjects	50	24:26	6.92	2–15	229	50	0	0	0
	Child controls	12	10:2	10.33	6–14	42	N/A	N/A	N/A	N/A
	Adult subjects	67	40:27	43.5	16–78	1344	30	25	4	8
	Adult controls	13	8:5	38.23	24–71	39	N/A	N/A	N/A	N/A
Study 2	Adult subjects	20	9:11	40.55	16–67	761	20	0	0	0

AD: atopic dermatitis; PUC: pruritus of unknown cause; F: female; M: male. Subjects were classified according to age: child, <16 years; adult, >16 years.