Change in the Number of Patient Safety Reports Through a 16-Year Patient Safety Initiative: A Retrospective Study Focusing on the Incident Severity and Type in a Japanese Hospital.

We found increases in the number of patient safety reports according to the incident severity and type. This suggests two contextual changes occurring during the cultural maturity process, which reflected the development of organizational patient safety culture in our institution. The first was the establishment of a reporting attitude in the institution. The second was to overcome barriers to patient safety.