Differences in cancer rates among adults born between 1920 and 1990 in the USA: an analysis of population-based cancer registry data
Anecdotal experience has suggested that cancer is becoming more common for younger patients. This suggests that lifestyle changes and environmental effects are causing more cancer. Using data from population-based cancer registry this study looks at the increase in cancer risk for younger cohorts.
Information is available from this huge study with data from more than 23 million patients, of whom more than 7 million developed cancers. Comparing cancer rates from 5-year birth cohorts showed that for 9 of the 34 different cancers included in the study there was an increase for patients born in the 1990 cohort compared to the 1955 cohort. The mortality has decreased, with better treatment options.
Some cancers notably smoking affected cancers such as lung cancer, show a decrease due to changed lifestyle. Ovarian cancer also is less, probably due to medical intervention with hormonal contraception.
Understanding of these changes suggest a need for modification of lifestyle and environmental factors with more research into underlying causes.
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