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Hidradenitis suppurativa is a systemic disease with substantial comorbidity burden: a chart-verified case-control
Julia Shlyankevich1, Allison J Chen2, Grace E Kim3
1Clinical Unit for Research Trials and Outcomes in Skin, Massachusetts General Hospital, Boston, Massachusetts; Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts; Alpert Medical School, Brown University, Providence, Rhode Island.
Background:
Hidradenitis suppurativa (HS) is a chronic inflammatory disease involving intertriginous skin. Previous epidemiologic studies have been limited by small sample size.
Objective:
We sought to describe the prevalence and comorbidities of HS in a large patient care database.
Methods:
In this retrospective case-control study, we chart-validated all patients within a hospital database who received at least 1 billing code for HS between 1980 and 2013. Verified cases were matched with controls based on age, gender, and race. Prevalences of a priori selected comorbidities were compared between HS and control groups.
Results:
A total of 2292 patients at Massachusetts General Hospital received at least 1 code for HS. A total of 1776 cases had a validated diagnosis of HS, yielding a prevalence of 0.08%. In unadjusted analysis, all comorbidities were diagnosed significantly more in HS compared with control including (in rank order of likelihood): smoking, arthropathies, dyslipidemia, polycystic ovarian syndrome, psychiatric disorders, obesity, drug dependence, hypertension, diabetes, thyroid disease, alcohol dependence, and lymphoma (all P < .01).
Limitations:
Control subjects were not validated for absence of HS and comorbidity validation was not performed for either group.
Conclusions:
Our results highlights the high comorbidity burden of patients with HS compared with matched control subjects.
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