2024-08-19 04:00:14
Are younger generations more likely to develop cancer than older generations? This question comes up frequently in public conversation, but it is also at the heart of recent intense research activity. A study of unprecedented scale is published in the August edition of the journal Lancet Public Healthhelps answer the specific picture in the United States: According to the authors, led by epidemiologist Hyuna Sung of the American Cancer Society, several forms of the disease are increasingly common in younger people.
For Americans born in the 1980s and 1990s, the risk of 17 types of cancer (breast, pancreas, kidney, colon, small intestine, leukemia, thyroid cancer, myeloma, etc.) will be higher than in the previous several categories. generation. In contrast, for about ten types of cancer (often linked to smoking), younger people had lower risks.
Specific to the situation across the Atlantic, these results cannot be extrapolated to other parts of the world, but in many countries the incidence of some cancer pathologies is increased in people under 50 years of age, sometimes also as a result of early diagnosis. The number of works focusing on “early cancer” in the scientific and medical circles (early onset cancer) has nearly doubled in the past five years.
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Hyuna Sung and her co-authors analyzed incidence and mortality rates (number of new cases and deaths per 100,000 people per year) for 34 cancers according to year of birth. They used data from the National Cancer Registry and the National Center for Health Statistics to compile information on more than 23 million patients affected by the disease between 2000 and 2019. Rate.
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“For eight of these 34 cancers, we found that the risk increased in every successive birth cohort since birth in 1920 [aux Etats-Unis]the researchers wrote. In particular, cancer rates among women and men in the 1990 birth cohort were approximately two to three times higher than those in the 1955 birth cohort. (…) You are [+ 192 %] and pancreas [+ 161 %] and liver and cholangiocarcinoma in women. [+ 105 %]. »
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