American Journal of Epidemiology Vol. 154, No. 10 : 975-977
Copyright © 2001 by The Johns Hopkins University School of Hygiene and Public Health
LETTERS TO THE EDITOR |
RE: "BREASTFEEDING AND REDUCED RISK OF BREAST CANCER IN AN ICELANDIC COHORT STUDY"
Fred Hutchinson Cancer Research Center Seattle, WA 98109
In the abstract of their paper, "Breastfeeding and Reduced Risk of Breast Cancer in an Icelandic Cohort Study," Tryggvadóttir et al. (1
) stated that their study was the first cohort study to indicate a negative association between breastfeeding and breast cancer. In fact, it is the second such study. Approximately 1 year ago, we published results from a cohort study carried out in Shanghai, China (2
). Although our study and the Icelandic study both provided evidence for a protective effect of lactation against breast cancer, our study showed a reduced risk only among women who had lactated for more than 3 years, as compared with Tryggvadóttir et al.'s report of a reduced risk even in women who had lactated
REFERENCES
Epidemiological Unit Icelandic Cancer Society Skogarhlid 8 Reykjavik, Iceland
Icelandic Cancer Registry Icelandic Cancer Society Skogarhlid 8 Reykjavik, Iceland
Molecular and Cell Biology Laboratory Icelandic Cancer Society Skogarhlid 8 Reykjavik, Iceland
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D. B. Thomas, K. A. Rosenblatt, R. M. Ray, L. Tryggvadottir, T. Sigurvinsson, H. Tulinius, and J. E. Eyfjord RE: "BREASTFEEDING AND REDUCED RISK OF BREAST CANCER IN AN ICELANDIC COHORT STUDY" Am. J. Epidemiol., November 15, 2001; 154(10): 975 - 977. [Full Text] [PDF] |
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