Table 2. Clinical comparison among the primary subtypes of inducible urticaria.

Subtypes of urticaria versus clinical characteristics	Dermographic urticaria	Cholinergic urticaria	Cold urticaria	Delayed pressure urticaria	p value
Female sex	85.5	61.9	88.9	100	NS
Current age, years	42.6±12.7	36.9±13.9	37.7±16.7	41.3±11.2	NS
Time of urticaria, years	4.0±4.7	7.0±7.1	2.3±1.5	10.5±13.0	NS
Response to AH1 at a licensed dose	28.9	14.3	44.4	0	0.012
Response to AH1 at a dose 4-fold higher than the licensed dose	36.1	28.6	22.2	66.7	0.012
Refractory to AH1	8.4	19.1	0	16.7	0.012
No response to treatment	26.6	38	33.4	16.6	0.012
Months to response to treatment	17.0±15.8	17.8±17.7	10.2±4.5	19.2±6.6	NS

Kruskal-Wallis Test. Results expressed as % or mean±standard deviation. NS: not significant. AH1: antihistamine.