We are inundated with warnings, advice and studies that deeply affect how we live. Yet, many are poorly understood, if not misleading.
It's commonplace to note, for instance, that two-pack-a-day smokers face 20 times the lung cancer risk of non-smokers. What does that really mean to someone contemplating taking up the habit?
On average, around 10 nonsmokers per 100,000 are expected to get lung cancer. At 20 times the risk for heavy smokers, about 200 per 100,000 people will contract… more