it is important to consider the follow-up rate (the proportion of subjects originally entering the study for whom data are available at the end of the study) when appraising study results
the power of the study will be diminished (and the results will be unreliable) if data are available on too few original subjects (e.g. <80%) (1,2)
Annotations allow you to add information to this page that would be handy to have on hand during a consultation. E.g. a website or number. This information will always show when you visit this page.