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Immunization
Findings from R.H.H. Groenwold and co-authors provide new insights into immunization
January 28th, 2009
According to recent research published in the International Journal of Epidemiology, " The validity of non-randomized studies using healthcare databases is often challenged because they lack information on potentially important confounders, such as functional health status and socioeconomic status. In a study quantifying the effects of influenza vaccination among community-dwelling elderly we assessed whether additional information on not routinely available covariates was indeed associated with exposure to influenza vaccination and could, therefore, have led to residual confounding in healthcare databases." " We randomly selected 500 persons aged 65 years and...
Source: Vaccine Weekly (2009-01-28)
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