Table 3.

Proportions of positive immediate reading skin-test-results and 95% confidence intervals in patients with various anaphylactic manifestations (%); [95%CI]

Characteristics		Proportion immediate reading positive
All anaphylaxis manifestations including acute urticaria/angioedema n = 45		17/45, (37.8%), [25.1%–52.4%]
Anaphylaxis Grade I (H.L.Mueller) (urticaria only) n = 4		1/4, (20.0%), [1.0%–62.4%]
Anaphylaxis Grade II-IV (H.L.Mueller) n = 41		16/41, (39.0%), [25.7%–54.3%]
interval from drug exposure to the onset	0–1 h n = 35	16/35 (45.7%), [30.5%–61.8%]
	1–24 h n = 10	1/10 (10%), [0.5%–40.4%]
interval between the index reaction and the allergic work-up	<2 months,	2/5 (40.0%), [7.1–76.9%]
	2–6 months	8/16 (50.0%), [28.0–72.0%]
	2 months to 3 years	11/23 (47.8%), [29.2–67.0%]
	>3years	4/17 (23.5%), [9.6%–47.3%]