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Screening and breast cancer equity in NZ
Screen-detected cancers were less common in Māori women, and crude survival was worse, but survival gaps narrowed among screen-detected cases.
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How large was the cohort?
1846 screening-age women with first primary breast cancer.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
What share were screen detected overall?
1064 of 1846 (57.6%).
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
Screen-detection rates by ethnicity?
62.7% in NZ European vs 49.2% in Māori women.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
Crude five-year survival Māori vs European?
77.6% vs 90.2%.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
Crude ten-year survival Māori vs European?
73.8% vs 83.5%.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
Among screen-detected cancers, Māori survival?
Numerically similar/better and not significantly different from NZ European.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
Why does screening matter for equity?
Lower screen-detection in Māori and worse non-screen survival contribute to outcome gaps.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
What outcomes were studied?
Stage at diagnosis and breast cancer survival by ethnicity and deprivation.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
Were symptomatic cancers common?
Yes—782 (42.4%) were symptomatic.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified
A key limitation?
Cohort comparison cannot prove screening alone caused survival equality in screen-detected Māori women.
Source: Impact of mammographic screening on ethnic and socioeconomic inequities in breast cancer stage at diagnosis and survival in New Zealand: a cohort study · DOI · quote verified