A new study from JAMA suggests that health care is more dangerous for patients at hospitals purchased by private equity firms.

The study examined the rates of adverse events at 51 hospitals before and after they were bought by private firms. Hospitals showed a 25% increase in patient complications after being purchased.

Previous research has shown that staffing cuts and the replacement of higher paid workers are often tied to private acquisitions.

The Senate Budget Committee also announced a bipartisan investigation into the impact of private equity purchases on health care facilities earlier this month.