Table 2.

Distribution of matching factors between cases and controls.

		Bullous pemphigoid		Pemphigus vulgaris
		Cases	Controls	Cases	Controls
Age	<60	3	12	19	53
	60–70	10	26	2	6
	70–80	10	29	3	10
	>80	6	17	1	3
Ethnicity	Caucasian	24	78	11	55
	Asian	4	5	8	12
	Middle Easter	1	1	6	5
Sex	Female	18	49	14	40
	Male	11	35	11	32