Discrepancies between the responses to skin prick test to food and respiratory antigens in two subtypes of patients with irritable bowel syndrome

Table 1 Personal history of allergies and food intolerance, and SPT response to FAs and IAs in IBS patients and normal controls (%)

	D-IBS (n = 19)	C-IBS (n = 17)	Without gastrintestinal symptoms (n =51)
Reported food intolerance	11 (57.8)	9 (52.9)	3 (5.8)
Personal history of allergies	12 (63.1)	10 (58.8)	26 (50.9)
No. of tests for FAs	171	153	459
Positive SPT for FAs	45 (26.3)b	21 (13.7)	39 (8.4)
No. of tests for IAs	114	102	306
Positive SPT for IAs	23 (20.1)	20 (19.6)	52 (16.9)

Papule 3 mm larger than the negative control was considered to be a positive response.

^bP < 0.01 compared to the other groups (χ²).