aim : to determine the associated factors of reflux duration, using quantile regression model. background : reflux is one of the most prevalent gastrointestinal disorders.  statistical tools are widely used to assess the associated factors on reflux severity and frequency. patients and methods : a door to door questionnaire has been used to evaluate gastrointestinal symptoms including reflux an...

Subject of research: mixed-integer 0-1 linear programming problem for choosing optimal structures non-elementary regression models.
 Purpose integrate into the additional constraints that will guarantee construction quite interpretable regressions.
 Methods analysis, mathematical programming, method successive increase absolute contributions variables to general determination.
 O...