Loss to Follow-Up in Cohort Studies: How Much is Too Much?

@article{Kristman2004LossTF,
  title={Loss to Follow-Up in Cohort Studies: How Much is Too Much?},
  author={Vicki L. Kristman and Michael V Manno and Pierre C{\^o}t{\'e}},
  journal={European Journal of Epidemiology},
  year={2004},
  volume={19},
  pages={751-760}
}
Loss to follow-up is problematic in most cohort studies and often leads to bias. Although guidelines suggest acceptable follow-up rates, the authors are unaware of studies that test the validity of these recommendations. The objective of this study was to determine whether the recommended follow-up thresholds of 60–80% are associated with biased effects in cohort studies. A simulation study was conducted using 1000 computer replications of a cohort of 500 observations. The logistic regression… CONTINUE READING

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