Genome-wide profiling is increasingly being marketed towards consumers to assess their risk of developing certain diseases. However, there has been little research into the psychological effects of these tests.
Researchers from Scripps Translational Science Institute have now looked into these effects in a large group of patients. They followed 2,037 participants who took the Navigenics Health Compass, a test that assesses the risk for about 20 common diseases, for a period of three months.
Taking the test did not increase anxiety symptoms, dietary fat intake, or exercise behavior. There was some test-related distress correlated with the average estimated lifetime risk of getting the diseases tested for, but at the same time 90.3 percent of all subjects had no test-related distress at all. The use of screening tests did not change among the group and notably health effects of the test were not studied.
In conclusion, personal genetic testing does not seem to generate a lot of distress, although the study was clearly limited by a high dropout percentage of 44 percent and the self-selection of participants who opted to do the test.
Article in New England Journal of Medicine: Effect of Direct-to-Consumer Genomewide Profiling to Assess Disease Risk
Flashback: An Interview with Navigenics…
*This blog post was originally published at Medgadget*
I’ve been writing about personal genomics for years. The standard concept of it is that you can order such genetic tests online, send your saliva or buccal swab to the lab where they analyze your DNA, then you can check online what kind of diseases you have elevated or lowered risk for. That’s how Navigenics, 23andMe or Pathway Genomics works. Now Pathway had a major announcement:
San Diego based startup Pathway Genomics announced [May 18th] that it will begin selling its DNA collection kits at Walgreens drugstores beginning in mid-May, for about $20 to $30. Unlike a pregnancy test, users won’t be able to get results immediately. They will have to send in their saliva sample and then go to Pathway’s website to select the particular test they want. Users choose from drug response ($79), which assesses how well an individual can metabolize certain drugs, predicting the best dosage for that person or whether they will be susceptible to certain side effects; pre-pregnancy planning ($179), which determines whether parents carry mutations for serious genetic diseases; health conditions ($179), which assesses risk for a number of conditions, including diabetes, Alzheimer’s, prostate cancer and more; or a combination of all three ($249). The kits won’t be sold in New York because the state’s laws require medical professionals to be involved in this type of testing.
As you may know, I’m not totally against direct-to-consumer genetic testing, but I really would like to see doctors and genetic counselors in this process. I think selling such kits through drugstores can only happen in the U.S. right now. Read more »
*This blog post was originally published at ScienceRoll*