Tags: breast cancer | diagnosis | lead time
OPINION

Don't Believe 'Lead-Time Bias'

David Brownstein, M.D. By Wednesday, 14 June 2017 04:26 PM EDT Current | Bio | Archive

Conventional medicine’s approach to breast cancer is shameful.

You would think with 1 in 7 women diagnosed that the medical establishment and government at the highest levels would be focused on finding the cause of and treatment for breast cancer — to prevent and eventually cure the disease.

But the cancer medical industrial complex doesn’t look at the situation that way.

Rather, they are focused on doing what they have done for the last 70 years — diagnosing and treating breast cancer with surgery, chemotherapy, and radiation.

Don’t get me wrong: We have made progress in diagnosing breast cancer.

In fact, we have many more diagnostic tools, including mammograms and magnetic resonance imaging (MRI) that can identify breast cancer lesions at a far earlier stage.

However, we have not changed how long a patient lives with breast cancer once she, or he, has been diagnosed.

Though there are studies claiming that women are living longer, most are not. They are simply diagnosed at an earlier stage than women were years ago.

Mammograms diagnose breast cancer at an earlier stage than could be done before.

But studies have shown that less than 1 percent of women will actually live longer lives as a result of earlier diagnosis.2

For example, a 50-year-old woman diagnosed with a 3 cm lesion will live, on average, 10 years.

On the other hand, a 45-year-old woman diagnosed with a 1 cm lesion may live 15 years. That is, 50 percent longer than the woman with a 3 cm lesion.

Both women die at age 60, yet statistics claim that the second woman lived 50 percent longer becauseshe was diagnosed earlier. This phenomenon is called “lead-time bias.”

I’ve studied the data going back to 1930, and I can tell you that we have made little progress in what matters — lowering the death rate from breast cancer — even though we have spent a large fortune improving diagnostic capabilities.

© 2025 NewsmaxHealth. All rights reserved.


Dr-Brownstein
Though there are studies claiming that women are living longer, most are not. They are simply diagnosed at an earlier stage than women were years ago.
breast cancer, diagnosis, lead time
318
2017-26-14
Wednesday, 14 June 2017 04:26 PM
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