🚨 Don’t fall for the “50% risk reduction” trap.
That’s just RRR dressing up like a superhero 🦸‍♂️
But sometimes… it’s just a sidekick.
Let’s decode RRR, ARR & NNT—the trio every doctor should master 👇
👩‍⚕️ Imagine a new adjuvant drug in breast cancer.
Trial says:
💥 “Recurrence dropped by 50%!”
Everyone claps. But should you?
🎠That’s the illusion of Relative Risk Reduction (RRR).
Let’s dig deeper:
Here’s the real story:
đź§Ş Out of 100 patients:
🔹 Control: 20 recurrences
🔹 Treatment: 10 recurrences
📊 RRR = (20 - 10) / 20 = 50%
🧨 Flashy. Impressive. BUT…
📊 ARR = 20% - 10% = 10%
✅ That’s the true benefit.
📊 NNT = 1 / 0.10 = 10
👉 So, you must treat 10 patients to prevent 1 recurrence.
Not bad. But not magic either.
🎯 Moral?
RRR is a marketing flex đź’Ş
ARR is the truth serum đź’‰
NNT? That’s the bedside number you tell your patient 👩‍⚕️🧓
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