title: Incidence of de Quervain's tenosynovitis in a young, active population.
abstract: OBJECTIVE
  De Quervain's tenosynovitis is thought to occur most frequently in women, with presentation of pain and swelling in the first dorsal extensor sheath. The epidemiology of this extensor tendinitis is not well described. We evaluated the incidence and demographic risk factors for de Quervain's tenosynovitis using a large database of military personnel.
  
  
  METHODS
  The Defense Medical Epidemiology Database (DMED) collects International Classification of Diseases, 9th Revision, and Clinical Modification (ICD-9-CM) coding information for every patient encounter occurring for United States military personnel. We queried the DMED system by race, gender, military service, rank, and age for the years 1998-2006 using the ICD-9 code 727.04, limiting data to first presentations. Multivariate Poisson regression was used to estimate the rate of de Quervain's tenosynovitis per 1000 person-years, as well as incidence rate ratios and 95% confidence intervals.
  
  
  RESULTS
  There were 11,332 cases of de Quervain's tenosynovitis in the population at risk of 12,117,749 person-years. Women had a significantly higher rate of de Quervain's tenosynovitis at 2.8 cases per 1000 person-years, compared to men at 0.6 per 1000 person-years. Age greater than 40 was also a significant risk factor, with this age category showing a rate of 2.0 per 1000 person-years compared to 0.6 per 1000 in personnel under 20 years. There was also a racial difference, with blacks affected at 1.3 per 1000 person-years compared to whites at 0.8.
  
  
  CONCLUSIONS
  In analysis of a large population, we have described the epidemiology of stenosing tenosynovitis of the first extensor compartment. Risk factors for de Quervain's in our population include female gender, age greater than 40, and black race.
  
  
  METHODS
  Prognostic II.
authors.affiliation: Department of Orthopaedics, University of Colorado School of Medicine, Denver, Colorado 80045, USA. Jennifer.Wolf@ucdenver.edu
authors.forename: Jennifer Moriatis
authors.initials: JM
authors.lastname: Wolf
authors.forename: Rodney X
authors.initials: RX
authors.lastname: Sturdivant
authors.forename: Brett D
authors.initials: BD
authors.lastname: Owens
mesh_terms: D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D044383:Black People / Q000706:statistics & numerical data; D016208:Databases, Factual; D053684:De Quervain Disease / Q000453:epidemiology*; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008889:Military Personnel; D015999:Multivariate Analysis; D012307:Risk Factors; D017678:Sex Distribution; D012737:Sex Factors; D014481:United States / Q000453:epidemiology; D044465:White People / Q000706:statistics & numerical data; D055815:Young Adult; D001741:Black or African American