A report into the recall of neurology patients has found 68% had a diagnosis that was considered to be secure.
In 2018, about 3,000 patients were recalled as investigations were carried out into the work of neurologist Dr Michael Watt at Belfast’s Royal Victoria Hospital.
He was suspended amid concerns over possible misdiagnoses.
Neurology is the treatment of brain conditions, including MS, Parkinson’s, stroke and motor neurone disease.
Dr Watt worked as a neurologist at the RVH
Last year thousands of his patients were asked to come for a fresh assessment after concerns were raised about his care.
The Department of Health report, published on Thursday, covers 2,952 patients assessed by the reviewing clinicians.
It found that 2,006 people had a secure diagnosis, while 617 had a diagnosis that was considered not to be secure.
For 329 patients “there was uncertainty in respect of whether the previous diagnosis was secure”.
However, the department said an unsecure diagnosis did not automatically equate to a misdiagnosis.
The report was meant to be published earlier in the year, but “highly sensitive unforeseen circumstances” delayed it.
The Department of Health has said sorry for the delay and any additional concerns.
Both it and the Belfast Trust have also apologised to affected patients.
They said “it’s highly regrettable that one person should have to go through this experience, let alone the large numbers that have been involved”.
Following a BBC Spotlight investigation in November, Dr Watt offered his “sincere sympathy” to those affected by Northern Ireland’s biggest patient recall.
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He said he recognised the “distress these events have caused”.