The Primary Care Collaborative is criticizing an Annals of Internal Medicine report that concluded there wasn't enough evidence to determine the patient-centered medical-home practice model's effect on clinical outcomes and costs. The collaborative asserts that the report overlooks more recent studies that "tell a far more encouraging story."The journal study, funded by the HHS' Agency for Healthcare Research and Quality, identified some 5,731 studies for analysis, but its authors found only 19 that contained the effectiveness data the researchers sought. But, according to a news release from the PCPCC, more current research available now offers more-conclusive evidence of the model's cost-effectiveness and shows that "medical-home transformation is a journey that requires patience and leadership."