Earlier this year, researcher Rebecca Siegel of the American Cancer Society published a startling report showing that colon and rectal cancer incidence is rising among Gen X and millennials while falling in older generations.
After delving further into the data, she and her co-authors identified a “perplexing escalation in disease occurrence.” In a paper in JAMA, the journal of the American Medical Association, they reported that deaths from colorectal cancer also are increasing for young and middle-aged Americans — though the increase appears, at least so far, to be confined to white men and women.
The U.S. mortality rate for colorectal cancer for ages 20 to 54 fell from 6.3 per 100,000 in 1970 to 3.9 in 2004. It then began to go up by 1 percent annually. By 2014, the rate was 4.3 per 100,000.
Breaking the numbers out by race reveals the trend, with the outlook becoming better for blacks and people of other races but not for whites.
The mortality rate for whites had declined for decades but began climbing starting in 2004, going from 3.6 per 100,000 to 4.1 per 100,000 in 2014. Among blacks, it went down to 6.1 per 100,000 in 2014. While that’s still higher than for whites, the trend is heading in the right direction. For other races, mortality rates declined until 2006 and remained stable through 2014.
Siegel noted that the racial patterns are “inconsistent” with trends in major risk factors for colorectal cancer. These include obesity, which is increasing among all races and would suggest colorectal cancer rates should be going up among all races, too.