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. 2014 May 10;14:136. doi: 10.1186/1471-244X-14-136

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Copyright © 2014 Kedzior and Laeber; 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 credited.

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Random-effects meta-analysis (A) and one-study removed analysis (B) ofN = 5 studies on cannabis use at baseline and anxiety at follow-up (allORsadjusted for potential confounders). Notes: The top forest plot (A) shows that there was an overall positive association between cannabis use at baseline and anxiety at follow-up in N=5 studies according to the random-effects meta-analysis (overall mean weighted OR=1.28, 95% CI: 1.06-1.54). The bottom forest plot (B) shows the outcome of the one-study removed sensitivity analysis. ‘Point’ on plot B refers to the overall mean weighted OR of all studies without the study in each row. This analysis revealed that the positive association between cannabis use at baseline and anxiety at follow-up was still present when the study with the largest OR in plot A (OR=3.20) was removed from the analysis.