Factors associated with sharing e-mail information and mental health survey participation in large population cohorts.
...Published in International journal of epidemiology
People who opt to participate in scientific studies tend to be healthier, wealthier and more educated than the broader population. Although selection bias does not always pose a problem for analysing the relationships between exposures and diseases or other outcomes, it can lead to biased effect size estimates. Biased estimates may weaken the utili...
