The returned data frame follows a standardized schema that downstream
functions rely on. Across the currently implemented DGMs, the following
columns are used:
yi (numeric): The effect size estimate.
sei (numeric): Standard error of yi.
ni (integer): Total sample size for the estimate
(e.g., sum over groups where applicable).
es_type (character): Effect size type, used to disambiguate
the scale of yi. Currently used values are
"SMD" (standardized mean difference / Cohen's d),
"logOR" (log odds ratio), and "none"
(unspecified generic continuous coefficient).
study_id (integer/character, optional): Identifier of the
primary study/cluster when a DGM yields multiple estimates per study
(e.g., Alinaghi2018, PRE). If absent, each row is treated as an
independent study.