My lede:

One-third of hospital patients experience adverse events and about 7% are harmed permanently or die as a result, according to a study that detected patient safety problems at a far higher rate than other methods.

The study, in April’s Health Affairs, echoes two reports issued in November 2010 that showed rates of adverse events hovering near 25% among hospitalized Medicare patients nationwide and at 10 North Carolina hospitals.

The findings draw attention to the safety troubles that have lingered in U.S. hospitals in the 12 years since the Institute of Medicine’s headline-grabbing report “To Err is Human.” The study cited research estimating that up to 98,000 patients die each year due to preventable medical errors.

Read the whole shebang.