The phrase "added the interaction between" is correct and usable in written English.
It can be used when discussing the inclusion of a relationship or effect between two or more variables or elements in a study or analysis.
Example: "In the latest version of the report, we added the interaction between temperature and pressure to better understand their combined effects on the reaction rate."
Alternatives: "incorporated the relationship between" or "included the interplay between".
As expected, the interaction between LEP and dietary protein level lost significance (p = 0.190) if we add the interaction between fat mass and dietary protein level (p = 0.418) in the model.
Lastly, to the full model we add the interaction between the country and the latest survey year in which the item was asked.
15 Subgroup analyses were performed by adding the interaction between the subgroup variable and randomised treatment into the analysis of covariance model.
To these constraints that apply to both public and private health service delivery structures, we should add the interaction between public and private supply of services in LMICs.
34 Subgroup analyses were performed by adding the interaction between these factors and treatment into the survival analysis model and by observing whether the change in the model log likelihood was statistically significant.
However, adding the interaction between age and mating status to the model revealed that the effect of mating status on reproductive success was significantly greater for older males, compared to first-year males (Fig. 2a, age × mating status: effect (SE) = +3.78 (1.60), χ = 5.58, df = 1, p = 0.018).
We first entered Hg exposure, negative life events, and covariates into the model, then added the interaction term between Hg exposure and negative life events to examine the effect modification.
In model (4), we add the interactions between target public/private status and the method of payments.
The proportional hazards assumption was tested by adding the interactions between each of the independent variables and the logarithm of time since diagnosis to the model; a joint test of these interactions tests the assumption.
We also add the interactions between the preceding response (I(o i (j -1) = 1), I(o i (j -1) = 2)) and the risk factors of interest x ij 1, ⋯, x ijP.
