title: Effect of individual and socio-economic risk factors on the incidence of thyroid carcinoma in Olsztyn province.
abstract: BACKGROUND
  The aim of this study was an investigation into the individual and socio-economic risk factors of the incidence of thyroid carcinoma.
  
  
  METHODS
  Our study was into risk factors affecting the incidence of thyroid carcinoma conducted in patients included in a register of thyroid carcinoma. For that purpose, a questionnaire was prepared which covered personal information, medical history and socio-economic factors. A statistical analysis was conducted.
  
  
  RESULTS
  The register comprised 297 patients (89% female) with thyroid carcinoma and 589 healthy subjects. Age group distribution was similar for both groups. The largest group was aged 50-54. The number of children born to women with carcinoma and women in the control group did not differ significantly. 10% of the women with carcinoma had used contraception. Patients were most frequently born in Olsztyn province, an area of relative iodine deficiency. 9.72% had suffered from thyroid disease in childhood. 32.41% had a family history of thyroid disease. Mothers of patients most frequently also came from regions of similar iodine level. The fathers most frequently came from Warsaw province (17.08%). The origin of the remainder was the same as of the mothers. 36% of patients had elementary, 14% vocational, 38% secondary and 13% higher education. Logistic regression showed that the risk of carcinoma increased 0.98 times in each person younger by a year. Individuals with body mass lower had 0.98 times greater risk of the disease by each kilogram.
  
  
  CONCLUSIONS
  The risk factors for the incidence of thyroid carcinoma: female sex, age at onset, low body mass.
authors.affiliation: School of Medicine, University of Varmia, and Masuria, Olsztyn, Poland. elbandurska@uninet.pl
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Bandurska-Stankiewicz
authors.forename: Ewa
authors.initials: E
authors.lastname: Aksamit-Białoszewska
authors.forename: Joanna
authors.initials: J
authors.lastname: Rutkowska
authors.forename: Aleksander
authors.initials: A
authors.lastname: Stankiewicz
authors.forename: Danuta
authors.initials: D
authors.lastname: Shafie
mesh_terms: D017668:Age of Onset; D015984:Causality; D004522:Educational Status; D005260:Female; D006801:Humans; D015994:Incidence; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011044:Poland / Q000453:epidemiology; D011159:Population Surveillance; D012307:Risk Factors; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D013964:Thyroid Neoplasms / Q000453:epidemiology*