Table II.

Incidence of Hidradenitis Suppurativa per 100,000 Persons by Age and Gender in Olmsted County, Minnesota, 1968–2008

Age group, years	Women		Men		Both sexes
	No. of cases	Rate per 100,000	No. of cases	Rate per 100,000	No. of cases	Rate per 100,000
0–19	30	4.4	7	1.0	37	2.7
20–29	66	18.4	23	7.4	89	13.3
30–39	50	14.2	23	6.7	73	10.5
40–49	36	12.3	14	5.0	50	8.7
50–59	3	1.5	5	2.6	8	2.0
60+	4	1.2	7	2.9	11	1.9
Total (95% CI)		8.2† (7.0–9.3)		3.8† (3.0–4.7)		6.0‡ (5.2–6.7)

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.