How to Read Medical Evidence Without a Medical Degree

A new study makes the news. Coffee is good for you, then bad, then good again. The whiplash is not because science is broken — it is because a single study is rarely the whole story, and headlines compress nuance into certainty.

The hierarchy of evidence

Not every study carries equal weight. A randomised controlled trial tells you more than an observational study, which tells you more than a single case report. Knowing roughly where a claim sits in this hierarchy is half the battle.

The plural of anecdote is not data — but a well-run trial is worth a thousand anecdotes.

— Dr. Priya Nair

Questions worth asking

• How many people, and compared to what?
• Is this an association, or genuine cause and effect?
• Who funded it, and has it been repeated?

None of this replaces professional medical advice. It simply helps you hold the headlines a little more lightly — and your questions a little more firmly.