The phrase "effect regression" refers to a situation when a change or improvement that was achieved or experienced in the past is reversed or goes back to its previous state. Full definition
Using these variables, a fixed effects regression model is employed. (eyeonhousing.org)
We conducted an intent - to - treat analysis of the effect of the assigned experimental condition on each primary outcome using a mixed - effects regression model. (jamanetwork.com)
Maternal heavy alcohol use and toddler behavior problems: a fixed effects regression analysis. (cambridge.org)