Category: Limits of observational studies


News media sound the alarm on mercury in seafood during pregnancy — was it a false alarm?


NFL-affiliated neurosurgeon downplays concussion risks in Penn State news release

1 3/23/2016

Observational studies & the health messaging merry-go-round: Moderate alcohol, once “healthy,” now “not so good for you after all”


Half-baked coverage of potatoes and gestational diabetes


Media case study: PR news release vs. news stories on mammography screenings for older women

2 1/6/2016

How the sausage inside a nutrition study is made


False positive mammograms and cancer risk: An epidemiological whodunit

12 9/22/2015

More BMJ overstatement about an observational study — this time it’s antidepressants and violent crime

3 9/14/2015

Low pulse = higher crime rate? Cause-and-effect confusion in heart rate/crime stories

1 9/9/2015

Yo-yo stories on optimum weight and Alzheimer’s risk — inappropriate language keeps readers’ heads spinning