We thank Dr. Jain for his interest in our paper. 1 We agree that the lack of clinical detail is a limitation of our study. However, while we may have misclassified some high-risk pregnancies as low risk, the same is probably also true for low-risk pregnancies. We used a consistent definition of high risk throughout the study period and one would not expect the proportion of high-risk pregnancies to increase greatly over the time period of our study. Moreover, in the final year of our study, almost one in every five singleton pregnancies was classified as high risk, which would suggest that we used an inclusive definition of high risk.
Footnotes
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For the full letter, go to: www.cmaj.ca/cgi/eletters/cmaj.090979v1#269362
REFERENCES
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