A year ago several regional hospitals attempted to reduce the number of patient injuries resulting from staff errors by implementing a plan to systematically record all such errors  The incidence of these injuries has substantially decreased at these hospitals since then
Clearly, the knowledge that their errors were being carefully monitored made the hospitals' staffs much more meticulous in carrying out their patient-care duties
The plan did not call for the recording of staff errors that could have caused patient injuries but did not.