Failings in the way that clinical trials are designed and presented may lead doctors to overstate the benefit of treatments, experts warned last week.

The conference on clinical trials, organised by the James Lind Alliance and the Lancet and held at the Royal Society of Medicine in London, also heard that key groups of participants were often excluded from clinical studies and as a result were denied the benefits of evidence based medicine. Stephen Holgate, professor of immunopharmacology at Southampton University, said that children and elderly people were “especially neglected” in this area.

As another …