A new report on one of the most dreaded war wounds finds that 1,367 men in the United States military suffered injuries to their genitals or urinary tract in Iraq or Afghanistan from 2001 to 2013, mostly from bomb blasts. More than a third of the injuries were severe.

The report, published this week by military researchers in The Journal of Urology, is thought to be the most comprehensive review of so-called genitourinary injuries in veterans. The problem was recognized before, but the extent was uncertain.

The number of cases is “unprecedented” and the injuries “uniquely devastating” because they can impair a man’s ability to have sex, father children or urinate normally, according to the report. Most of the wounded men — 94 percent — were 35 or younger, in “their peak years of sexual development and reproductive potential,” the report said, adding that the psychological toll was especially heavy in such young men.

Researchers say these men are at high risk for suicide.

More veterans have these injuries now than in the past because more are surviving than during previous wars, as a result of better body armor and battlefield medicine. Another reason for the increase, according to the report, is that the often rough terrain in Afghanistan forced troops to patrol on foot, which left the soldiers’ groin areas vulnerable to explosions from bombs planted in the ground. Many pelvic injuries occurred during the troop surge there in 2009 and 2010.