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Based on the Uppsala model's explanatory variables, this study includes firm age, product uniqueness, and domestic growth opportunity as international market involvement antecedents.
Model 3. Explanatory variables as in model 2 plus type 2 diabetes (yes/no).
In Model 1 (Empty model), no explanatory variable was included.
Model 1 is the null model, contained no explanatory variable.
To evaluate the importance of different explanatory variables we used a multi-model inference, based on the sum of Akaike's weight of each model where each explanatory variable appeared (Burnham and Anderson 2002).
Cox's proportional hazard model evaluated explanatory variables for the restorations' and sealants' survival, including sex, age, and type of behavioral intervention.
In the estimation of the model, several explanatory variables are tested according to a stepwise procedure.
aEmpty model – no explanatory variables.
Each maximal model started with a set of basic explanatory variables and a set of additional, for each model characteristic, explanatory variables.
Model M3 is the full model incorporating all explanatory variables.
Model (1) is an empty model without any explanatory variables included.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com