Table 3.

Baseline characteristics by caller enrollment

Variables	Enrolled (n = 2032)	Declined (n = 2877)	P*
% white	76.7	73.1	<.001
% women	56.7	52.9	<.001
% with some college education	25.2	23.4	<.001
No. of cigarettes smoked per day (±SD)	20.1 (±11.1)	18.3 (±14.5)	<.001
No. of years smoking cigarettes (±SD)	26.0 (±14.3)	23.1 (±14.8)	<.001
Age, y (±SD)	46.7 (±13.7)	46.2 (±14.4)	.29

^*Variables were analyzed with χ² tests for categorical variables and a general linear model for continuous variables. All statistical tests were two-sided.