Aetiological factors of importance for the development of rheumatoid arthritis

Scand J Rheumatol. 2004;33(5):300-6. doi: 10.1080/03009740310004748.


Objective: To evaluate exposure to external factors associated with risk or prevention of rheumatoid arthritis (RA).

Methods: Two hundred and ninety-three incident cases of RA and 1346 population-based referents were included in a case-referent study, in which previous exposure experiences were collected through a postal questionnaire.

Results: An inverse association between RA and additional schooling after compulsory school was seen for men. Current smoking was associated with significantly increased risks of RA for men and women [odds ratio (OR) 2.9, 95% confidence interval (CI) 1.4-6.4, and OR 1.8, 95% CI 1.1-2.9, respectively], as was previous smoking for men (OR 2.3, 95% CI 1.2-4.4). There were also indications of relationships between previous use of a private well and RA in both men and women.

Conclusion: Several previously published associations have been reproduced in the present study, which also generates some new hypotheses that suggest further research.

Publication types

  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Arthritis, Rheumatoid / epidemiology
  • Arthritis, Rheumatoid / etiology*
  • Educational Status
  • Female
  • Humans
  • Male
  • Menopause
  • Middle Aged
  • Reference Values
  • Risk Factors
  • Smoking
  • Surveys and Questionnaires