Review Article

Paternal Smoking and Risk of Childhood Acute Lymphoblastic Leukemia: Systematic Review and Meta-Analysis

Figure 1

Meta-analysis of the association between childhood ALL and paternal smoking in different time windows. Random-effect OR estimates and weights were used in the graphs. X-axis represent the OR (odds ratio). The sizes of the boxes indicate the weight of the corresponding study used for estimates of summary effects.
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(a) ever smoking
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(b) preconception smoking
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(c) smoking during pregnancy
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(d) smoking after birth