Selective under-representation of Pacific peoples in population estimates for health indicator measurements in Aotearoa New Zealand misinforms policy making

Table 1 Components used to estimate the key population statistics: usually resident population; Estimated resident Population (ERP) and Projected Resident Population (PRP), produced by stats NZ

	Census Usually Resident Population^a	Estimated Resident Population (ERP)	Projected Resident Population (PRP)^b
Counted by Census	Residents of that area in the area on census night	Residents of that area in the area on census night	Residents of that area in the area on census night
Counted by Census	Residents of that area elsewhere in NZ on census night	Residents of that area elsewhere in NZ on census night	Residents of that area elsewhere in NZ on census night
Estimated from Post-enumeration Survey (PES)	-	Residents missed by census (net census undercount)	Residents missed by census (net census undercount)
Estimated from administrative data	Census 2018: Residents missing in census response but active in tax, health, education, and ACC (Accident Compensation Corporation) in the past 2 years.	Residents temporarily overseas on census night	Residents temporarily overseas on census night
Estimated from administrative data		Births, deaths, and net migration since census night	Assumptions about future birth rates, death rates and net migration

Source: Tatauranga Aotearoa Stats NZ: Population Statistics – user guide. https://www.stats.govt.nz/methods/population-statistics-user-guide
^aBecause of the low response rate of Census 2018, residents who had not responded but had been active in one of these administrative data in the previous 2 years, were added to the Census 2018 enumerations
^bThese national projections are published annually by StatsNZ

ISSN: 1471-2458