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According to Norton and Suppe, a valid simulation is one in which certain formal relations (what they call 'realization') hold between a base model, the modeled physical system itself, and the computer running the algorithm.
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The direction of any identified DIF was explored, and the DIF effect size determined by comparison of pseudo R values between the analysis models and a base model including PHQ-9 total score as the only predictor.
The user can choose number of imputations and there is a possibility to add extra models which will be estimated between the base model and the regression model.
Figure 3 Comparison between the base model and proposed model.
Figure 7 illustrates the inversion results around Mt. Aso to compare between the base model and the "Aso" model.
Fig. 7 Comparison between the inversion results of the vertical velocities between the base model (the upper figure) and "Aso" model (the lower figure).
The change in the AUC between the base model and the model with the additional risk factor included.
In this analysis, a small net benefit was noted for categorically coded GGT, while there was no difference in the curves between the base model and the model with continuously coded GGT.
The difference in objective function values (∆OFV) between the base model and the model including the covariate effect was considered approximately χ-distributed and a decrease of at least 3.84 in OFV when adding the covariate effect (one extra parameter) was regarded as significant (p < 0.05).
15 For comparison, we also calculated the NRI between the risk factors base model and a model additionally including the five components of the MetS in their continuous form.
However, a higher BMI at the start of a study (in both models), and a more similar energy intake between diets (in the base model only) was associated with greater weight loss in people following the higher-protein diet.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com