The percentage increase in eligibles if 20 - to 29-pack-year current smokers were included was substantially greater for women than men ( 22.2 % , 95 % CI = 17.9 % to 26.7 % ; vs 12.2 % , 95 % CI = 9.3 % to 15.3 % , P < .001 ) and for minorities than non-Hispanic whites ( 30.0 % , 95 % CI = 24.2 % to 36.0 % ; vs 14.1 % , 95 % CI = 11.1 % to 17.0 % , P < .001 ) .