Figure 1.

Study-specific odds ratios and fixed- and random-effects meta-analysis odds ratios for maternal ever-smoking and risk of acute myeloid leukemia in selected Childhood Leukemia International Consortium (CLIC) and non-CLIC studies between 1990–2014. Odds ratios for CLIC studies were generated by using original data. The P value for heterogeneity between groups is 0.552. The vertical solid line represents the reference for “no association,” and the dashed line represents the risk estimate from the fixed-effect meta-analysis. CI, confidence interval.