Debray TP Moons KG van Valkenhoef G Efthimiou O Hummel N Groenwold RH Reitsma JB 2015 Individual participant data (IPD) meta-analysis is an increasingly used approach for synthesizing and investigating treatment effect estimates. Over the past few years, numerous methods for conducting an IPD meta-analysis (IPD-MA) have been proposed, often making different assumptions and modeling choices while addressing a similar research question. We conducted a literature review to provide an overview of methods for performing an IPD-MA using evidence from clinical trials or non-randomized studies when investigating treatment efficacy. With this review, we aim to assist researchers in choosing the appropriate methods and provide recommendations on their implementation when planning and conducting an IPD-MA. https://sonar.ch/global/documents/60864 eng info:eu-repo/semantics/altIdentifier/doi/10.1002/jrsm.1160 info:eu-repo/semantics/altIdentifier/pmid/26287812 Research synthesis methods. - 2015 IPD NRSI RCT cross-design evidence synthesis meta-analysis non-randomized intervention studies review Data Interpretation, Statistical Humans Linear Models Meta-Analysis as Topic Models, Statistical Proportional Hazards Models Randomized Controlled Trials as Topic Software Treatment Outcome Get real in individual participant data (IPD) meta-analysis: a review of the methodology. http://purl.org/coar/resource_type/c_6501