The HPBNET Procedure

The network in Figure 1 does not include variables Sex or Duration, because PROC HPBNET automatically selects those variables by using independence tests. The following statements produce Figure 3, which shows the variable selection results. PROC HPBNET removes Duration from the network because the p-value of the chi-square and G-square statistics of Duration is greater than 0.05 (the default value for the ALPHA= option, which is not specified). Sex is conditionally independent of Pain given Treatment; therefore, PROC HPBNET also removes it from the network.

 proc print data=varselect noobs label;
 run;