An MFP (multivariate fractional polynomial) multivariate modelling approach was used, which, after fitting of linear factors, ascertains whether the model fit could be improved by using a polynomial form for any of the linear variables (Royston and Sauerbrei, 2008).
A χ likelihood-ratio test was used to ascertain whether the full model fitted the data significantly better than the nested model (p < 0.05; 1 degree of freedom as models differed by 1 parameter).
To ascertain whether the general model of intake regulation can produce predicted outcomes that parallel observed changes in intake and body weight, a computer simulation was implemented.
As a number of excellent models now exist, the next 5 10 years will ascertain whether these models will predict response of human cancer to intervention.
He will collect nasal swabs from vaccinated children to ascertain whether the patterns in his mouse model hold true.
Finally, we used predictive modelling to ascertain whether the observed trend in first-birth caesarean section rates could be explained by changes in risk factors over time.
In the subgroup analysis, a test for interaction in the Cox regression model was performed to ascertain whether the hazard ratio for the effect of EPP surgery on survival differed significantly between the various categories.
The aim of this study was to explore the dimensionality of the GHQ12 using Rasch models, in particular to ascertain whether the GHQ12 is a unidimensional structure.
Without validation of the classification model, it is impossible to ascertain whether the bacteria are classified by peaks in the mass spectrum that have no causal relationships with the bacteria, but instead randomly correlate with the bacterial classes.
