リスクの解釈は難しい

Usually, we use the "risk" to explain the possibility to become illness.

However, I suppose that it is difficult for almost all the people to understand the meaning of risk.

For example, one patient have the symptom of cancer and the doctor said "The risk that you have a cancer is probably 70%".
If I were this patient, I exactly think "What is 70%? the 70% of risk have no sense for me. For myself, it is only that I have a cancer, or not. Therefore, I'd like know 100% or 0%."

So, I think the explanation of the risk is difficult.
I'd like to know the best way to make someone understand the risk.

CT scans on children 'could triple brain cancer risk'

Multiple CT scans in childhood can triple the risk of developing brain cancer or leukaemia, a study suggests.

The Newcastle University-led team examined the NHS medical records of almost 180,000 young patients.

But writing in The Lancet the authors emphasised that the benefits of the scans usually outweighed the risks.

They said the study underlined the fact the scans should only be used when necessary and that ways of cutting their radiation should be pursued.

During a CT (computerised tomography) scan, an X-ray tube rotates around the patient's body to produce detailed images of internal organs and other parts of the body.

In the first long-term study of its kind, the researchers looked at the records of patients aged under 21 who had CT scans at a range of British hospitals between 1985 and 2002.

Because radiation-related cancer takes time to develop, they examined data on cancer cases and mortality up until 2009.

Brain cancer and leukaemia are rare diseases.

CT scans on children 'could triple brain cancer risk' - BBC News

Talking about this news, CT is very useful device for our health.
As we well understand this article when we read correctly, the cancer risk by taking CT is very low.

We don't afraid this title.
BBC shouldn't write the exaggerate title on this.