0 = Female
1 = Male

0 = Clerical/homemaker/student
1 = Buisness
2 = Professionals
3 = Skilled labor

0 = Married
1 = Not married/single

0 = Low
1 = Moderate
2 = Vigorous

0 = No
1 = Yes

1 = Control_STC
2 = Experimental_DTC