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Correspondence
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Volume 336:1834-1835 June 19, 1997 Number 25
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Induced Abortion and the Risk of Breast Cancer

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To the Editor: Whereas most studies have reported positive findings,1 Melbye et al. (Jan. 9 issue)2 reported an overall null association between induced abortion and breast cancer, on the basis of their record-linkage analysis of all Danish women born between 1935 and 1978. Although their prospective, computerized data base is, by its nature, free of possible recall bias, their study is nonetheless methodologically flawed.

Since the study encompasses such a wide age range, women who had induced abortions are concentrated in the younger end of the total cohort, resulting in considerably less average follow-up time for them than for women . . . [Full Text of this Article]

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