The British Medical Journal recently undertook an general analysis of common medical treatments to determine which are supported by reliable scientific evidence. They evaluated around 2,500 procedures, and the results were as follows:
-13% were found to be beneficial
-23% were likely to be beneficial
-8% were as likely to be as harmful as beneficial
-6% were unlikely to be beneficial
-4% were likely to be harmful or ineffective
-46% unknown in their effectiveness
In other words, when you take your sick child to the hospital or clinic, there is only a 36% chance that he/she will receive a treatment that has been scientifically demonstrated to be either beneficial or likely to be beneficial.