Between 2001 and 2018, alcohol consumption rose steadily among U.S. women aged 20–49, and this increase was statistically linked to higher rates of breast, colorectal, and uterine cancers. No similar links were found with smoking, calorie intake, saturated fat, or physical activity.

Even small amounts of alcohol are linked to a higher chance of developing breast cancer in women, whether they have gone through menopause or not.

In U.S. women aged 20–49 between 2001 and 2018, changes in cancer rates over time were not statistically linked to overall levels of physical activity, fiber consumption, or total calories consumed at the population level.

Between 2001 and 2018, the number of U.S. women aged 20–49 with obesity rose steadily each year, with the most severe form rising faster. During the same period, the rates of breast, colorectal, and uterine cancer also rose, and these increases were closely aligned in timing across the population.

From 2001 to 2018, smoking rates dropped by 4.84% each year among U.S. women aged 20–49, but this decrease did not correspond with measurable changes in the rates of breast, colorectal, or uterine cancer in the same population.