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Nearly Half of Worldwide Cancer Deaths Preventable (Due to Smoking, Drinking and Obesity)

Posted on September 1, 2022 by Devon Herrick

About half of cancer deaths worldwide are preventable, according to an analysis published in The Lancet and summarized in Nature.

Using estimates of cancer cases and deaths from more than 200 countries, researchers found that avoidable risk factors were responsible for nearly 4.5 million cancer deaths in 2019 (see ‘Global cancer deaths’). That represents more than 44% of global cancer deaths that year. Smoking, alcohol use and a high body-mass index (BMI) — which can be indicative of obesity — were the biggest contributors to cancer.

In 2019 more men died of cancer due to preventable risk factors than women. There were 2.88 million preventable cancer deaths among men, compared to 1.58 million preventable cancer deaths among women. The reason is thought to be that more men smoke and drink than women.

The findings, published in The Lancet on 20 August, largely confirm results from smaller studies and highlight how reducing exposure to risk factors could help to prevent a substantial proportion of cancers, says Rudolf Kaaks, a cancer epidemiologist at the German Cancer Research Center in Heidelberg. The take-home message is simple: “Don’t smoke,” says Kaaks. “Don’t get overweight, and don’t drink too much alcohol.”

Among preventable cancer deaths, nearly 37% were due to smoking.

In 2019, half of all male deaths from cancer, and more than one-third in women, were due to preventable risk factors including tobacco and alcohol use, unhealthy diets, unsafe sex and workplace exposure to harmful products, such as asbestos.

For the gory details see:

  • The global burden of cancer attributable to risk factors, 2010–19: a systematic analysis for the Global Burden of Disease Study 2019.
  • The impact of the COVID-19 pandemic on cancer deaths due to delays in diagnosis in England, UK: a national, population-based, modelling study.

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For many years, our health care blog was the only free enterprise health policy blog on the internet. Then, when the NCPA closed its doors, the health blog stopped as well.

During this five-year hiatus no one else has come forward to claim the space. So, my colleagues and I have decided to restart the blog in connection with the Goodman Institute. We invite you and others to use this forum to share your views.

John C. Goodman,

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