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An increase in lifestyle-related cancers - such as lung, colorectal, and skin cancers - over the past decade spotlights the need for prevention, suggests a study.
"While the increase in lung, colorectal, and skin cancers over the past decade is concerning, the prevention potential is substantial," said Dr. Christina Fitzmaurice.
"Vital prevention efforts such as tobacco control, dietary interventions, and broader health promotion campaigns need to be scaled up in response to this rise in lifestyle-related cancers," she added.
The study covers 1990 to 2016; it is part of the Global Burden of Disease (GBD) study, a comprehensive effort to quantify health internationally. Researchers at the Institute for Health Metrics and Evaluation reviewed 29 cancer groups, including lung, breast, prostate, skin, colorectal, pancreatic, stomach, and liver cancers, as well as leukemia and other cancer groups (full list below).
The study provides findings by age and sex for 195 countries and territories.
While lifestyle-related cancers saw a universal increase from 2006 to 2016, several cancers from infectious causes - including cervical and stomach cancers - decreased over the same time period.
Study estimates were analysed using a Socio-demographic Index (SDI) based on rates of education, fertility, and income. SDI is more comprehensive than the historical "developed" versus "developing" nations framework.
Countries with high SDI have high levels of income and education and low fertility, whereas low-SDI countries have low levels of income and education and high fertility.
Large disparities in cancer incidence and death persist between high- and low-SDI countries. Researchers found rates of cancer incidence and death remained higher in high-SDI countries in 2016. For example, the odds of developing breast cancer over the course of one's lifetime were the highest - at 1 in 10 women - in high-SDI countries, but only 1 in 50 for women in low-SDI countries.
Conversely, the largest and fastest increase in new cancer cases between 2006 and 2016 occurred in middle-SDI countries. And women in low-SDI countries are nearly four times more likely to develop cervical cancer than women in high-SDI countries, and in 2016, cervical cancer was the most common cause of cancer incidence and death in low-SDI countries.
"Ensuring universal access to health care is a vital prerequisite for early detection and cancer treatment," said Fitzmaurice. "And improving access to advanced diagnostic technologies not commonly available in low-SDI countries is a critical step toward achieving health equity globally."
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