Public Health Agency Deputy Director-General Dr Andrew Old says improvements in the Ministry of Health's population data will vastly improve Māori data.
Dr Andrew Old said the 2020 Health Service User data set used to count vaccinations is being updated with one from 2021. Photo: RNZ / Angus Dreaver
A review of the Health Ministry's population data has recommended a raft of improvements.
Health Service User (HSU) information, which counts the number of people who use a health service within 12 months, is the main count used to make health decisions.
But during the Covid-19 vaccine rollout it was criticised for its significant undercount of the Māori population, which could have contributed to its equity issues.
In its December report into the Covid-19 response, the Waitangi Tribunal said the Ministry of Health's data collection did not "accurately and equitably inform the vaccine rollout for Māori".
The ministry announced today that after a review by Stats NZ, the HSU data would be updated from 8 August, with a total of 233,000 people on the updated dataset.
The population of Māori on the dataset would increase by 35,000.
But despite the criticism, Old said the HSU was still "ideal" for supporting vaccination efforts.
"It represents real people who are here in the country interacting with the health system," he told a news conference.
"That means that we can target and plan our campaigns at both a community level, for example, identifying areas where coverage is low, but also at an individual level."
In the review, released today, Stats NZ acknowledged inconsistencies in population data, and also confirmed lower representation of Māori.
However, it agreed there were some advantages in HSU's use for health-based analyses, including monitoring vaccine coverage.
"The lower representation of Māori in the HSU requires careful examination at source to identify whether it is driven by systemic issues, or genuine reporting choices by health service users," it said.
Old said the new 2021 dataset would vastly improve Māori data, and the information would now be updated every six months.
The ministry had either already adopted, or was working on implementing all but one of the Stats NZ recommendations, he said.
Old said there was one exception that related to a "technicality" in ethnicity reporting as it was still under discussion with other agencies.