. Author manuscript; available in PMC: 2013 Jul 1.

Published in final edited form as: J Invest Dermatol. 2012 Aug 30;133(1):97–103. doi: 10.1038/jid.2012.255

Table III.

Incidence of Hidradenitis Suppurativa per 100,000 Persons by 10-Year Intervals in Olmsted County, Minnesota, 1970–2008.

Period ^*	Women		Men		Both Sexes
Period ^*	No. of cases	Incidence rate per 100,000^† (95% CI)	No. of cases	Incidence rate per 100,000^† (95% CI)	No. of cases	Incidence rate per 100,000^‡ (95% CI)
1970–1979	22	5.4 (3.0–7.7)	13	3.2 (1.4–5.0)	35	4.3 (2.8–5.8)
1980–1989	28	5.3 (3.3–7.4)	18	4.0 (2.1–5.8)	46	4.6 (3.2–6.0)
1990–1999	52	8.7 (6.3–11.0)	16	2.8 (1.4–4.2)	68	5.7 (4.4–7.1)
2000–2008	85	14.1 (11.1–17.1)	30	5.2 (3.3–7.1)	115	9.6 (7.8–11.3)

4 cases (2 women and 2 men) were omitted from 1968–1969

CI, confidence interval.

^†

Incidence per 100,000 person-years is directly age-adjusted to the population structure of the U.S. total population in 2000.

^‡

Incidence per 100,000 person-years is directly age-and sex-adjusted to the population structure of the U.S. total population in 2000.