title: Epidemiology of thyroid disease in Hamilton (New Zealand) general practice.
abstract: OBJECTIVE
  To retrospectively review health records in two general practices in Hamilton, New Zealand (NZ) linking three data sources to estimate the prevalence of diagnosed thyroid dysfunction (TD).
  
  
  METHODS
  A record-linkage study using computerised searches to find cases of diagnosed TD by diagnostic codes, prescribing data, and laboratory data. Data was verified against computerised and written records.
  
  
  RESULTS
  The prevalence of diagnosed TD was 3.1%. Overt hypothyroidism was diagnosed in 2.5%, overt hyperthyroidism in 0.2% and 'other' conditions such as goitres, nodules and thyroiditis in 0.4% of the study population.
  
  
  CONCLUSIONS
  This study provides a representation of TD in the community prior to mandatory iodine fortification. Our prevalence data is similar to national and international literature with the burden of TD being greater in women and in the older population.
  
  
  CONCLUSIONS
  A national study with a sufficient sample of Māori and Pacific patients is needed before supplementation with iodine is introduced.
authors.affiliation: Waikato Clinical School, University of Auckland, New Zealand. gibbonsv@waikatodhb.govt.nz
authors.forename: Veronique
authors.initials: V
authors.lastname: Gibbons
authors.forename: John V
authors.initials: JV
authors.lastname: Conaglen
authors.forename: Steven
authors.initials: S
authors.lastname: Lillis
authors.forename: Vignesh
authors.initials: V
authors.lastname: Naras
authors.forename: Ross
authors.initials: R
authors.lastname: Lawrenson
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D013956:Antithyroid Agents / Q000008:administration & dosage; D002231:Carbimazole / Q000008:administration & dosage; D005194:Family Practice / Q000706:statistics & numerical data*; D005260:Female; D005527:Food, Fortified; D006801:Humans; D006980:Hyperthyroidism / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology; D007037:Hypothyroidism / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology; D038801:International Classification of Diseases; D007455:Iodine / Q000008:administration & dosage / Q000172:deficiency*; D008297:Male; D008501:Medical Records, Problem-Oriented; D008875:Middle Aged; D009520:New Zealand / Q000453:epidemiology; D015995:Prevalence; D011441:Propylthiouracil / Q000008:administration & dosage; D017678:Sex Distribution; D013959:Thyroid Diseases / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology*; D013974:Thyroxine / Q000008:administration & dosage; D055815:Young Adult
chemical_list: D013956:Antithyroid Agents; D011441:Propylthiouracil; D002231:Carbimazole; D007455:Iodine; D013974:Thyroxine