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"MLB takes a swing at smokeless tobacco"

The DAG revealed that only age and cigarette smoking status are confounding factors that are associated with both exposure and outcome, thus, these have been adjusted for in the analysis (Figure 1)

The study involved 1,086 patients who were trying to quit smoking by using one of three approaches: using a nicotine patch alone, taking Chantix, or using the patch in combination with a nicotine lozenge

Details on each study includedi.e., study design, number of participants, exposure and outcome definitions, and confounders adjusted forcan be found in the Supplementary Information