Sex- and Age-Adjusted Population Analysis of Prevalence Estimates for Hidradenitis Suppurativa in the United States | Adolescent Medicine | JAMA Dermatology | JAMA Network
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Original Investigation
August 2017

Sex- and Age-Adjusted Population Analysis of Prevalence Estimates for Hidradenitis Suppurativa in the United States

Author Affiliations
  • 1Department of Dermatology, Hofstra Northwell School of Medicine, New Hyde Park, New York
  • 2Department of Dermatology, Penn State Milton S. Hershey Medical Center, Hershey, Pennsylvania
JAMA Dermatol. 2017;153(8):760-764. doi:10.1001/jamadermatol.2017.0201
Key Points

Questions  What is the prevalence of hidradenitis suppurativa in the United States, and does prevalence vary by demographic group?

Findings  In this population-based analysis, the overall point prevalence of hidradenitis suppurativa was 0.10%, or 98 per 100 000 persons. Prevalence was highest among women (137 per 100 000), those aged 30 to 39 years (172 per 100 000), and African American (296 per 100 000) and biracial (218 per 100 000) patient groups.

Meaning  Hidradenitis suppurativa is an uncommon, but not rare, disease in the United States that disproportionately affects female patients, young adults, and African American and biracial patients.


Importance  The true prevalence of hidradenitis suppurativa (HS) is unknown.

Objective  To establish standardized overall and group-specific prevalence estimates for HS in the United States.

Design, Setting, and Participants  This retrospective analysis included a demographically heterogeneous population-based sample of more than 48 million unique patients across all US census regions. As of October 27, 2016, a total of 47 690 patients with HS were identified using electronic health record data.

Main Outcomes and Measures  Standardized overall point prevalence for HS and sex-, age-, and race-specific prevalence estimates of HS in the general US population.

Results  Of the 47 690 patients with HS (26.2% men and 73.8% women), the overall HS prevalence in the US population sample was 0.10%, or 98 per 100 000 persons (95% CI, 97-99 per 100 000 persons). The adjusted prevalence in women was 137 per 100 000 (95% CI, 136-139 per 100 000), more than twice that of men (58 per 100 000; 95% CI, 57-59 per 100 000; P < .001). The prevalence of HS was highest among patients aged 30 to 39 years (172 per 100 000; 95% CI, 169-275 per 100 000) compared with all other age groups (range, 15-150 per 100 000; P < .001). Adjusted HS prevalences among African American (296 per 100 000; 95% CI, 291-300 per 100 000) and biracial (218 per 100 000; 95% CI, 202-235 per 100 000) patients were more than 3-fold and 2-fold greater, respectively, than that among white patients (95 per 100 000; 95% CI, 94-96 per 100 000; P < .001).

Conclusions and Relevance  Hidradenitis suppurativa is an uncommon, but not rare, disease in the United States that disproportionately affects female patients, young adults, and African American and biracial patients.