pid: unique participant identifier
dateadded	
datemodified	
sign	
RiskNowFirst: order of presentation of choice questions -- risk now first = 1, future risk first = 0
numsecs
nummins	
gender	
age	
marital_status	
annual_household_income	
education	
ethnicity	
political_affiliation	
resources	
tobacco	
riskIndif: indifference point from matching
choseRiskNow: 1 = chose the risky option (with immediate risk)
choseRiskLater: 1 = chose the risky option (with future risk)

