The petrophysical algorithm computes seismic attributes in a forward modeling procedure that is tightly coupled to output from the traditional flow simulator.
The multiple regressive analysis considered age, sex, disease extent, histological subtype, period and treatment in a forward stepwise procedure.
A multivariate logistic regression model with bleeding event during ICU stay as the dependent variable was fitted in a forward stepwise procedure by using SAS SAS Institutee, Cary NC, USA).
The final multivariable model was built using logistic regression in a forward selection procedure as described by [ 5] using Intercooled Stata for Windows 7.0 (Stata Corporation, College Station, TX, USA).
The influence of DNA ploidy and SPF fraction on outcome, adjusted for the other prognostic factors, was assessed by univariate and multivariate analysis using the Cox proportional hazards regression model in a forward stepwise procedure (Cox, 1972).
To identify an instability-correlated gene expression signature, we sequentially introduced the top n most highly correlated probes into the regression algorithms in a forward selection procedure, and calculated root mean squared error of prediction (RMSEP) by leave one out cross validation (LOO CV) of training samples (R, 2.4.1 and 'pls' package, 2.5.0).
We then added entorhinal cortex volume on MRI and p-τ/Aβ in CSF using a stepwise forward procedure in order to determine the effect of each variable on the overall performance of the model.
This process selects variables in a forward-stepwise procedure and produces multiple local models that predict the response variable as a prediction surface or curve.
