The Pacific rate peaked at 91 hospital admissions for every 1000 children in 2011 and has come down only slightly to 87. The European rate has been steady throughout at between 30 and 34 admissions for every 1000 children.
The head of the Public Health Association's Asian caucus, Dr Lifeng Zhou, said the new data was "shocking". "Normally Asian health has been seen as a model," he said.
He said the figures showed that the Asian population was maturing, with fewer new migrants who were required to have good health to gain admission to the country, and more children born in New Zealand to parents who may have come here as students without financial resources.
The Asian population has roughly doubled from 238,000 in the 2001 census to 472,000 last year. Asian children increased at a slightly slower rate, from 56,000 to 97,000, while adults aged 30-plus increased at the fastest rate, from 113,000 to 242,000.
The poverty monitor shows that 28 per cent of all children in the "Asian/Other" ethnic group lived in homes earning below 60 per cent of the median household income per person in the past three years, compared with 30 per cent of both Maori and Pacific children and 15 per cent of European children.
Overcrowding rates in the last Census were also highest for children of Pacific (47 per cent), Maori (25 per cent) and Asian (21 per cent) ethnicity, compared with 5 per cent of European children.
Full report: tinyurl.com/nzcpmreport.