This potential publication bias may impact on the generalisability of our review to non-English speaking countries.
Begg funnel plots were used to assess
potential publication bias (40).
Not exact matches
The strength and consistency of reported associations, the extent of small study
bias and
publication bias, and the
potential contribution of confounding factors were examined where possible.
Several methods exist to address
potential effects of
publication bias, but each has its own shortcoming (Rothstein 2008).