Medicare beneficiaries dually eligible for Medicaid accounted for about one-third of all Medicare hospital stays in 2008, with a principal diagnosis of pressure ulcers (36 percent), asthma (32 percent) and diabetes (32 percent); and roughly one-quarter of stays for urinary tract infection, chronic obstructive pulmonary disease and bacterial pneumonia, according to a Statistical Brief from the AHRQs Healthcare Cost and Utilization Project, released Sept. 24.