title: Lack of an association between granuloma annulare and type 2 diabetes mellitus.
abstract: BACKGROUND
  Conflicting reports have been published regarding whether a relationship exists between granuloma annulare (GA) and diabetes mellitus (DM).
  
  
  OBJECTIVE
  To evaluate the prevalence of DM in patients with GA using a case-control design.
  
  
  METHODS
  The incidence of DM was determined in 126 patients with GA. Fifty of the 126 patients with GA were further compared with an age-, sex- and race-matched population of psoriasis patients seen during a similar time period in the same clinical setting.
  
  
  RESULTS
  Eleven (9%) of 126 GA patients suffered from type 2 DM. In the matched comparison of 50 patients, 11 (22%) GA patients and 10 (20%) psoriasis patients suffered from type 2 DM.
  
  
  CONCLUSIONS
  This case-control study failed to reveal any statistically significant correlation between GA and type 2 DM.
authors.affiliation: Department of Dermatology, UH 3240, Indiana University School of Medicine, 550 North University Boulevard, Indianapolis, IN 46202-5267, USA.
authors.forename: C L
authors.initials: CL
authors.lastname: Nebesio
authors.forename: C
authors.initials: C
authors.lastname: Lewis
authors.forename: T-Y
authors.initials: TY
authors.lastname: Chuang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D016009:Chi-Square Distribution; D002648:Child; D003924:Diabetes Mellitus, Type 2 / Q000150:complications* / Q000453:epidemiology; D005260:Female; D016460:Granuloma Annulare / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D007196:Indiana / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D011565:Psoriasis / Q000150:complications / Q000453:epidemiology