WEDNESDAY, July 3, 2019 (HealthDay News) -- Adding clinical variables improves the accuracy of lung allocation score (LAS) for transplant candidates, according to a study published online June 14 in ...

When you have a lot of data to enter, it is more efficient to specify the approximate number of observations rather than to create them one at a time. Click in the upper left corner of the data window ...

In this lab, you will add variables to your compiler's source programming language, with the ability to declare variables, assign values to them, and use them in expressions. Copy your c2 directory ...

Five variable selection methods are available. The simplest method (and the default) is SELECTION=NONE, for which PROC PHREG fits the complete model as specified in the MODEL statement. The other four ...