As a more rigorous test of whether the weight management module has any effect, compare the mean weight change for employees who enrolled in that module to the mean weight change for employees who did not enroll in it while controlling for baseline differences in any or all of the seven potential confounding variables: WGTPRE, AGE, BODYSAT, SEPHYSACT, SEDIET, MALE, and JOBCAT.

What SPSS command/function should be used for this problem?