People with lower levels of education are more likely to be diagnosed with colorectal cancer before age 50 than those with higher education, even when accounting for differences in diet, physical activity, and other lifestyle habits.

People with lower levels of education are statistically more likely to be diagnosed with colorectal cancer at a younger age, based on patterns of DNA methylation observed in a large group of patients.

Colorectal cancer deaths linked to low-fiber diets are highest in middle-income countries and lower in both poorer and wealthier countries, suggesting that economic development and dietary changes interact in complex ways with cancer risk.

People born after 1950 have a higher risk of developing colorectal cancer at a young age compared to earlier generations, suggesting that factors in their early environment or lifestyle, rather than aging or medical screening, are responsible for this trend.

Colorectal cancer rates are rising faster in younger people in Europe than in older generations, suggesting that something in the environment or lifestyle during childhood or early life may be responsible for this trend.

Between 2005 and 2016, colorectal cancer became more common each year among people in their 30s in Europe, and these individuals were diagnosed at older ages than people in their 20s, suggesting that environmental or lifestyle factors affecting younger generations began influencing their health earlier in life.