Drugs recently approved around the world to fight cancer increased patients' overall survival, but benefits vary depending on the drug, a new study shows.
Researchers looked at the 62 cancer drugs approved in the U.S. and Europe between 2003 and 2013 and found they extended survival by an average of about 3.5 months.
But nearly a third of the drugs lacked evidence to suggest they increased survival when compared to alternative treatments.
"Our results point to the notion that new cancer treatments may not always provide patients with greater clinical benefits, or lower risks, over existing treatments," wrote senior researcher Dr. Elias Mossialos, of the London School of Economics and Political Science, in an email to Reuters Health.
The risk-benefit ratio of new drugs is especially important if people are concerned, for example, about whether the cost of a drug would make it difficult for a person to complete the treatment regimen.
Writing in JAMA Oncology, Mossialos and colleagues point to growing questions about the value of new cancer medicines. While the drugs' high costs may be a barrier to access, they note, some people argue the high prices are justified if the treatments offer large benefits.
A lack of solid data on new drugs' benefits and risks makes it difficult to evaluating their value.
Further Reading: