Interestingly, the HTA methodology, unlike meta-analyses and systematic reports such as the Cochrane Collaboration, does not just ask the question of effectiveness of a particular intervention, it also addresses the questions of effectiveness of a therapy in everyday use (i.e. real world effectiveness), how it is used, its safety and its cost-effectiveness.
This report, amounting to 300-plus pages, exhaustively reviews the scientific literature in homeopathy. It summarises 22 reviews, 20 of which show positive results for homeopathy. Four of these showed strong evidence that homeopathy, as a system of medicine, is efficacious. It also finds strong supporting evidence for the Homeopathic treatment of allergies and upper-respiratory tract infections.
Homeopathy is effective - we can say with certainty that the Shang et al 2005 study does not prove that homeopathy has no effect.” The report also presents the results of the quality assessment of homeopathy trials, concluding that “studies of homeopathy and phytotherapy were of better quality than comparable conventional medicine studies”.