Returns a one-row metadata summary for a fitted qgcompmulti object. The
output stays compact and fit-oriented rather than repeating coefficient-level
results or diagnostic summaries.
Value
A one-row data frame containing compact fit metadata for the
qgcompmulti object, including sample-size information, outcome-family
metadata, estimand-scale metadata, mixture coding metadata, bootstrap
replication counts, Monte Carlo size, interaction status, and clustering
metadata.
