Although we developed comprehensive search strategies for our
review, there is still a possibility that we have missed some trials.
Nevertheless, as an international group, we are familiar with the
work of colleagues from around the world active in the domain of
falls after stroke, so we were able to include studies reporting on
trials that were only recently completed.
Another potential bias of our review might be that we excluded
trials that reported falls as an adverse event. It could be hypothesised
that, although falls were included in these trials despite the
fact that the interventions were not aimed at preventing them,
some of them might actually have a positive effect on falls or the
number of fallers, or both.