filename file1 "fitness.por"; proc convert spss=file1 out=fitness; run; proc reg data=fitness; model oxygen = age weight runtime restpuls runpulse maxpulse / selection = rsquare; run; quit; proc reg data=fitness; model oxygen = age weight runtime restpuls runpulse maxpulse / selection = cp; run; quit; proc reg data=fitness; model oxygen = age weight runtime restpuls runpulse maxpulse / selection = adjrsq; run; quit;