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Forest plot showing the association between cocaine use and risk of stroke. The solid squares represent the point estimate of each study with the horizontal lines denoting the 95% CI. The size of the square is proportional to the relative weight of each respective study. The center of the diamond is the pooled estimate using a random-effects model and its width reflects the 95% confidence interval. OR = Odds Ratio, CI = Confidence Interval [17,18,21,22,23,39].
