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. 2010 Jan 26;11:14. doi: 10.1186/1471-2350-11-14

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Copyright ©2010 McEachin et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Annotated forrest plot of relative risk for TUD among BD patients. Study authors, dates, counts of smokers with BD, and counts of smokers among controls are shown on the left. On the right, the MIX software weights each study then calculates Relative Risk and 95% confidence intervals for TUD among BD patients. A graphical representation of this data is seen in the middle. The META-ANALYSIS study summarizes the weighted contributions of each individual study and shows a Relative Risk of 2.39 for TUD among BD patients, with a 95% confidence interval of 1.88 to 3.02.