DNA tests give bogus results: report

© istockphoto.com/ Mark Evans

US government investigators say personalised DNA tests that claim to predict a person's likelihood of developing diseases are misleading and offer little or no useful information.

An undercover investigation by the Government Accountability Office found that four genetic testing companies delivered contradictory predictions for the same person's DNA.

Investigators also found that the test results often contradicted patients' actual medical histories.

The GAO reported their findings at a congressional hearing to scrutinise companies that mass-market personalised DNA tests.