WASHINGTON (AP) — The United States suffers far more violent deaths than any other wealthy nation, due in part to the widespread possession of firearms and the practice of storing them at home in a place that is often unlocked, according to a report released Wednesday by two of the nation's leading health research institutions.

Gun violence is just one of many factors contributing to lower U.S. life expectancy, but the finding took on urgency because the report comes less than a month after the shooting deaths of 26 people at an elementary school in Newtown, Conn.

The United States has about six violent deaths per 100,000 residents. None of the 16 other countries included in the review came anywhere close to that ratio. Finland was closest to the U.S. ranking with slightly more than two violent deaths per 100,000 residents.