Case-control studies on venous thromboembolism: bias due to design? A methodological study on venous thromboembolism and steroid hormone use.

@article{Heinemann2002CasecontrolSO,
  title={Case-control studies on venous thromboembolism: bias due to design? A methodological study on venous thromboembolism and steroid hormone use.},
  author={Lothar A. J. Heinemann and Michael A Lewis and Anita Assmann and Christine Thiel},
  journal={Contraception},
  year={2002},
  volume={65 3},
  pages={207-14}
}
This study addressed methodological issues of epidemiologic studies on venous thromboembolism (VTE) to show how design decisions can affect the results. It examines the influence of a restricting to hospitalized and to "idiopathic" cases of VTE in case-control studies on VTE risk and oral contraceptive (OC) use and thereby the bias potential. The diagnostic processes and OC exposures of 1068 suspected cases of VTE were followed in 21 German centers from 1994 to 1999 and evaluated compared to… CONTINUE READING

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