Figure 1.

Results from logistic model. "PR(C/C = 1)" is the probability of an individual being a case given the logistic model and the vector of risk factors and covariates for that individual. "C/C" indicates the case control identifier, 0 indicates a control and 1 indicates a case. "CIGNUM" is the number of cigarettes smoked: 0 = never smoked, 1 = smoked < 10 cigarettes daily, 2 = smoked 11–20 cigarettes daily, 3 = smoked 21–30 cigarettes daily, 4 = smoked > 30 cigarettes daily. "RACE" is 1 = white, 2 =black, 3 = other. "EDUCATE" is a participant's level of education attained, 1 = <8 years, 2 = 8–11 years, 3 = 12 years or high school graduate, 4 = post high school training, 5 = some college, 6 = college graduate, 7 = postgraduate education. "GENDER" is 1 = Male, 2 = Female. "AGE" is the participant's age at time of interview.