Limitations of propensity scores

The Experimental design page has been updated with additional information about the considerable limitations of propensity matching in clinical studies. These studies should not be considered as a substitute for a properly conducted prospective trial, and results from them should only be considered as associations, not as implying causality. The increasing prevalence of these types … Read more

Website issues resolved

The issues with the failure to display images and instability of the table of contents of the manual have been resolved by temporarily reverting to an earlier version of the files. This means that updates made in the past 3 weeks will not be able to be seen until a definitive solution to the problem … Read more