DENVER (AP) -- A study commissioned by the Pentagon says the military has more than 200 programs devoted to brain injuries and the psychological health of its troops, but no uniform way to evaluate whether they work or to share their findings.

The Rand Corp. study says some programs duplicate others and that the Pentagon risks making a poor investment of its resources without better coordination.

The Pentagon didn't immediately comment on the study.

Researchers looked at programs designed to prevent, identify and treat brain injuries and psychological problems such as post-traumatic stress disorder suffered in combat.

Since 2000, nearly 213,000 U.S. military personnel have suffered brain injuries in Iraq and Afghanistan. An estimated 300,000 have suffered from post-traumatic stress disorder or major depression.