Mammography service screening and breast cancer mortality in New Zealand: a National Cohort Study 1999-2011.

A Finnish study, published in 1997, of breast cancer mortality from cancers diagnosed only after the implementation of screening found 24% (95% CI (RR): 0.53–1.09; marginally nonsignificant) lower breast cancer mortality in women invited to screening during 1987–1989 compared with those not invited ( Hakama et al , 1997 ).

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In a follow-up of mammography screening in Florence (Italy), breast cancer mortality was estimated to be 19% lower (borderline significant) in invited women diagnosed with breast cancer between 1990 and 1993 (follow-up to 1999) compared with that in women not yet invited to screening ( Paci et al , 2002b ).

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