Estimating influenza vaccine effectiveness in community-dwelling elderly patients using the instrumental variable analysis method.

@article{Wong2012EstimatingIV,
  title={Estimating influenza vaccine effectiveness in community-dwelling elderly patients using the instrumental variable analysis method.},
  author={Kenny Wong and Michael A. Campitelli and Th{\'e}r{\`e}se A. Stukel and Jeffrey C. Kwong},
  journal={Archives of internal medicine},
  year={2012},
  volume={172 6},
  pages={484-91}
}
BACKGROUND Estimates of influenza vaccine effectiveness in elderly individuals are largely from observational studies, which are susceptible to bias. Instrumental variable (IV) methods control for overt and hidden biases in observational studies. METHODS We used linked health administrative databases in Ontario to examine the association between influenza vaccination and all-cause mortality among community-dwelling individuals older than 65 years for 9 influenza seasons (2000-2001 to 2008… CONTINUE READING