Prior reports of increased suicides in the U.S. Mountain Region ( e.g., Colorado) have prompted speculation that the excess is owing to greater access to rearms, increased isolation, or reduced income. 之前的报告中所称的美国山地地区(例如科罗拉多州)的自杀率的上升与该地区枪支泛滥、隔离程度的提高以及收入的减少都可能存在着联系。