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Previous Volume 330:715-716 March 10, 1994 Number 10 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: The study by Felson and colleagues (Oct. 14 issue)¹ is liable to be interpreted as showing a decline in the protective effect of estrogen, perhaps related to "catch up" bone loss. One of the chief problems with this cross-sectional study is that it included an inappropriate control group. By using as controls women over the age of 75 years who had not taken estrogen, the authors selected women likely to have high bone density. There is 20 percent excess mortality among women with low bone density,^2,3 even in the absence of fractures. Thus, at least one fifth . . . [Full Text of this Article]

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