Patients in New Zealand's emergency departments are labelling wait times 'agonising'.

Data comparing 2017 to 2022 shows the severity of the situation; during that period patients to Palmerston North Hospital saw a 126 percent jump in wait times.

Auckland City Hospital has seen a 98 percent rise.

Meanwhile, Te Whatu Ora is working to correct a more recent set of "real time" emergency wait time data, which it admits was inaccurate.

Chief Executive Margie Apa told Mike Hosking more accurate data will be uploaded to the agency's website today.

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