Table I.

Demographic data for patients diagnosed with bullous pemphigoid (BP) and control cohort

	BP	Control cohort
Subjects, n	5,739	17,168
Male, n (%)	2,712 (47.3)	8,103 (47.2)
Female, n (%)	3,027 (52.7)	9,065 (52.8)
Follow-up time, years, mean ± SD	3.1 ± 2.9	4.2 ± 3.1
Age, years, mean±SD	78.6 ± 12.2	78.7 ±12.2
Patients-years of observation	18,022	71,682

SD: standard deviation.