Preventable Cancer: Global Risks, Sex Differences & Regional Variations
- The global cancer burden is significantly influenced by preventable risk factors, though the specific factors and their impact vary considerably by region and sex.
- In 2025, We see projected that January 16th will see 2,041,910 new cancer cases and 618,120 cancer deaths occur in the United States.
- There’s a notable sex-based difference in the proportion of preventable cancers: today, approximately 45% of cancers in men are considered preventable, compared to 30% in women.
The global cancer burden is significantly influenced by preventable risk factors, though the specific factors and their impact vary considerably by region and sex. A recent comprehensive assessment, published in Nature Medicine, highlights the potential for substantial reductions in cancer incidence worldwide through targeted prevention strategies.
Preventable Cancers: A Global Overview
In , We see projected that will see 2,041,910 new cancer cases and 618,120 cancer deaths occur in the United States. While these figures are substantial, a significant proportion of these cases are linked to modifiable risk factors. Globally, the study reveals that nearly half of all preventable cancer cases are attributable to lung cancer (often linked to smoking and air pollution), stomach cancer (associated with H. Pylori infection), and cervical cancer (linked to HPV infection).
However, the overall picture is nuanced. There’s a notable sex-based difference in the proportion of preventable cancers: , approximately 45% of cancers in men are considered preventable, compared to 30% in women. This disparity is partly attributed to higher rates of smoking among men.
Regional Variations in Preventable Cancer Causes
The specific preventable causes of cancer also differ significantly based on geographic location. In Europe, the primary preventable causes for women are smoking, followed by infection and obesity. In stark contrast, in sub-Saharan Africa, infections account for nearly 80% of preventable cancers in women. This underscores the need for tailored prevention measures that address the unique risk profiles of each region or country.
The Role of Preventable Risk Factors
Decades of research have identified numerous cancer risk factors, including tobacco use, poor diet, physical inactivity, obesity, infection with certain pathogens, and exposure to ultraviolet (UV) radiation. According to data from the United States, over 40 percent of all new cancer cases diagnosed in were attributable to preventable risk factors.
Specifically, avoiding tobacco is cited as one of the most effective ways to prevent cancer. Nearly 20 percent of U.S. Cancer diagnoses are related to excess body weight, alcohol intake, unhealthy diet, and physical inactivity. Nearly all cases of cervical cancer, as well as many cases of head and neck and anal cancers, can be prevented by HPV vaccination.
Addressing Systemic Inequities
The burden of preventable cancer risk factors is not evenly distributed across populations. Decades of systemic inequities and social injustices have resulted in adverse differences in social determinants of health, leading to a disproportionately higher burden of cancer risk factors among U.S. Racial and ethnic minorities and other underserved populations.
Expert Perspectives and Future Goals
Dr. Andre Ilbawi, team lead for cancer control at the World Health Organization (WHO), described the study’s findings as “good news,” emphasizing that action can be taken to reduce the global cancer burden. He highlighted the success of countries that have implemented policies to tackle smoking or vaccinate against HPV.
Soerjomataram, the deputy head of the IARC Cancer Surveillance Unit, stated that the study represents “a comprehensive assessment of preventable cancer worldwide, incorporating for the first time infectious causes of cancer alongside behavioural, environmental, and occupational risks.” He added, “Addressing these preventable causes represents one of the most powerful opportunities to reduce the global cancer burden.”
The ultimate goal, according to Dr. Ilbawi, is to reduce the percentage of preventable cancers “as close to zero as possible.” This will require sustained efforts to address modifiable risk factors and implement effective prevention strategies tailored to the specific needs of different populations and regions.
Sex Differences in Cancer Incidence
Research published on , examined sex differences in cancer incidence rates by race and ethnicity using data from the Surveillance, Epidemiology, and End Results (SEER) Registry from to . The research concluded that only a minor fraction of the sex-related variability in cancer incidence is attributable to known risk factors.