Study Measures
Data on the following demographic variables were obtained: (1) age in years, (2) education (less than high school, some college, college degree or higher), (3) current marital status (married vs not married), and (4) ethnicity (White vs other ethnic identifications). Cufrent smoking status was determined, and total energy intake per day and percentage of energy from fat were estimated through the 60-item Block Food Frequency Questionnaire developed by the National Cancer Institute.2'