Table 1.

	HC	CSU	Eczema
	(n = 32)	(n = 23)	(n = 18)
Age (yr)	35 (18–60)	45 (13–68)	37 (14–69)
Female/male	17/15	11/12	11/7
Median age at onset (yr)	na	27 (8–56)	30 (12–60)
Median disease duration (yr)	na	2.5 (0.5–20)	3 (1–10)
Blood taken time after the first symptom of the latest attack (h)	na	11 (6–20)	8 (2–15)
Number of positive skin pricks for dust mite	0	5	4
Number of positive skin pricks for Artemisia	0	3	2
Number of positive skin pricks for ragweed	0	2	1
Number of positive skin pricks for cat fur	0	2	1
Number of positive skin pricks for dog fur	0	1	2

Median (range) data are shown for the number of subjects indicated.

na: not applicable.