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The World in Medicine
April 14, 1999

Mammography Dispute

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JAMA. 1999;281(14):1262. doi:10.1001/jama.281.14.1262-JWM90002-3-1

A new study suggests that Swedish health officials should reevaluate the country's mammography screening program because it apparently has not prompted a significant reduction in breast cancer mortality.

The study, published February 24 in the Swedish medical journal Läkartidningen, is based on data from more than 600,000 Swedish women aged 50 to 69 years who received mammograms every other year from 1986 to 1996 as part of a national screening initiative. An analysis of the data showed a reduction in breast cancer mortality of less than 1% during the study period. However, a 1993 meta-analysis of data from Swedish clinical trials of mammography had shown a 28% reduction in breast cancer mortality in the same age group.