There were no "sentinel" events, those resulting in death or serious physical or psychological injury, in Northland.
Falls accounted for eight of the 18 incidents (seven in Whangarei and one in Dargaville hospitals), one fewer than last year. Nationwide, falls made up more than half of all reports.
"While it is impossible to completely avoid falls, we continue to introduce interventions that will reduce the rate of falls and the seriousness of harm to patients," Dr Chamberlain said.
A specialist reporting system has improved recording, sharing information and feedback about events, he said. The Reportable Events Committee reviews them and follows up on recommendations.
"Patient safety walk rounds", conducted by senior staff in clinical areas twice a month, also enabled safety issues to be raised and fixed.
Nationally, the adverse events picture looks grim, with 525 patients affected in the year. Some resulted in death or permanent disability.
They also included a pocket knife hitting a Counties Manukau patient in the eye when a powerful magnetic resonance scan sucked the knife out of his pants "at speed". The blow tore the patient's retina and fractured the eye socket. The Counties Manukau DHB has installed a metal detector and has all MRI patients change into hospital gowns. At the Hutt Valley DHB, a dental therapist extracted the wrong tooth after looking at an X-ray the wrong way around and, also at Hutt Valley, a patient has reduced renal function after his large rather than the smaller kidney was removed for a live-donor transplant.
But the "Learning" report reflects a culture shift toward transparency as well as the sector understanding how to avoid harmful events, the commission's chairman Professor Alan Merry said.