“…In the field of sociology and economics, researchers are recommended to avoid interpreting the coefficient of interaction terms in “non-linear” models (i.e., generalized linear regression other than multiple linear regression) [ 2 ]. In the medical field, our previous meta-epidemiological study elucidated even among the randomized controlled trials published in 10 high-Journal-Impact-Factor journals, the coefficients of non-linear regression models were not appropriately interpreted [ 3 ].…”