Additive Mixed Meta-Analysis with Spline Meta-Regression R package splinemixmeta version 1.0.0 Fit additive mixed meta-analysis (AMMA) models, extending the 'mixmeta' package <https://cran.r-project.org/package=mixmeta> to allow for spline-based meta-regression. Functions combine features of 'mgcv' <https://cran.r-project.org/package=mgcv> for building spline components and 'mixmeta' for estimating general mixed-effects meta-analysis models. Software Depends: R (>= 4.1) Imports: ggplot2, mgcv, mixmeta Suggests: knitr, rmarkdown, testthat (>= 3.0.0) Marcus Beck <mbeck@tbep.org> Comprehensive R Archive Network (CRAN) Perry de Valpine [aut] (ORCID: <https://orcid.org/0000-0002-8329-6796>), Marcus Beck [aut, cre] (ORCID: <https://orcid.org/0000-0002-4996-0059>) GPL (>= 3) 2026-03-30 application/tgz https://CRAN.R-project.org/package=splinemixmeta doi:10.32614/CRAN.package.splinemixmeta