Table 1 Allergens used for titrated skin prick testing

	1:100000	1:1000000	1:10000000	Total
Cat	2	3	5	10
Ragweed	4	5	2	11
D farinae	1	0	1	2
D Pteronyssinus	1	0	0	1

The dilution of allergen that provoked a positive test during titrated skin prick testing is shown. Shown is the number of subjects that had a positive test at the indicated dilution of allergen. 24 subjects were recruited for the initial trial with pre-randomization data re-analyzed for this study. Adapted from Table E8 (reference [10]).

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