This supplementary appendix provides detailed methods, results, and analyses from a systematic review and meta-analysis on the effects of education on adult mortality. It includes supplementary tables and figures that expand on the main findings, such as inclusion and exclusion criteria, study-level covariates, and sensitivity analyses. The appendix also details the data availability and effect sizes, as well as the quality of the search string used to identify relevant studies. The methods section explains how non-standard data were standardized and displayed, and how confounders were controlled for. The results section discusses the impact of education on mortality by age, sex, and socioeconomic status (SDI), and provides sensitivity analyses to validate the findings. The appendix concludes with a list of included articles and references.This supplementary appendix provides detailed methods, results, and analyses from a systematic review and meta-analysis on the effects of education on adult mortality. It includes supplementary tables and figures that expand on the main findings, such as inclusion and exclusion criteria, study-level covariates, and sensitivity analyses. The appendix also details the data availability and effect sizes, as well as the quality of the search string used to identify relevant studies. The methods section explains how non-standard data were standardized and displayed, and how confounders were controlled for. The results section discusses the impact of education on mortality by age, sex, and socioeconomic status (SDI), and provides sensitivity analyses to validate the findings. The appendix concludes with a list of included articles and references.