How would I perform a logistic regression analysis on data below, analyzing if variable 'de' does as good a classification job as all six variables -> ror5, de, salesgr5, eps5, npm1, payoutr1

group pe ror5 de salesgr5 eps5 npm1 payoutr1

A 9 13 0.7 20.2 15.5 7.2 0.43

B 8 13 0.7 17.2 12.7 7.3 0.38

B 8 13 0.4 14.5 15.1 7.9 0.41

A 9 12.2 0.2 12.9 11.1 5.4 0.57