Crude ORs based on 2-stages meta-analysis of the association of IDU and immigration status in TB cases.

<p>The overall OR was obtained using a fixed effect meta-analysis (represented by diamond). Triangles are proportional to the amount of information contributed by each study (actual study population numbers are also given). Diamonds represent overall results. Horizontal lines represent 95% confidence intervals. Year, year of data collection. Id, article reference number. I², statistic which measures the degree of heterogeneity. 95%CI, 95% confidence intervals. Id, article reference number. Weight (M-H), fixed effect weight based on the sample size of studies.