Cancer was the second leading cause of death in the United States in 2020, after heart disease, with 602,350 cancer deaths recorded, according to the Centers for Disease Control and Prevention. (These are the states where the most people die of cancer.)
Several factors increase the risk of getting cancer, among them aging, personal or family history with cancer, tobacco use, obesity, alcohol, sunlight and other radiation, certain viruses, and cancer-causing substances in the environment. Avoiding or reducing these risk factors when possible could help prevent cancer.
While we cannot control aging – the median age of a cancer diagnosis is 66 years – we can minimize many of the other factors. Even simply increasing vaccination rates against the human papillomavirus would help prevent some cancer cases, as infections with high-risk types of HPV cause nearly all cervical cancers.
Smoking rates continue trending lower, from 23.3% of adults in 2000 to 13.7% in 2018, but no amount of tobacco use is safe. Tobacco use remains a leading cause of cancer – not just lung cancer, but several other types as well – and of cancer death. Further reducing smoking rates would also make a significant impact.
While smoking rates have decreased, obesity rates are trending higher. Nationwide, the adult obesity rate jumped from 30.5% in 1999-2000 to 42.4% in 2017-2018. The obese (those whose body mass index is 30 and over) may have an increased risk of cancers of the breast, colon, rectum, kidney, pancreas, and more.
To find the states where cancer incidence rates declined the most since 2000, 24/7 Tempo reviewed cancer incidence data from the Centers for Disease Control and Prevention WONDER Online Database. States were ranked by the percent change in the cancer incidence rate – the number of cancer cases per 100,000 age-adjusted population – from 2000 to 2018 (exceptions are noted). Adult obesity rates came from the CDC Behavioral Risk Factor Surveillance System Prevalence & Trends Data. Median household income figures are five-year estimates for 2020 from the Census Bureau American Community Survey.
Though the number of cancer cases increased in every U.S. state between 2000 and 2018, 43 states managed to reduce cancer incidence rates anywhere from 1.5% to nearly 34% (due in part to demographic changes) – and nationwide, the cancer incidence rate declined from 484.28 per 100,000 population in 2000 to 435.77 per 100,000 in 2018, a 10% drop. (Cancer death rates also dropped over the past two decades. Find out if Rhode Island is among the states fighting cancer most successfully since 2000.)
Obesity rates, meanwhile, increased in all states during that time, though five of the 10 states with the best improvement in cancer incidence rate also recorded among the 10 lowest percentage point increases in obesity rates over the period considered.
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