Participants assigned to treatment as usual with smoking-cessation treatment , relative to those assigned to treatment as usual , had significantly better outcomes for drug-free days at 6-month follow-up ( ( 2 ) ( 1 ) = 4.09 , P < .05 ) , with a decrease in drug-free days from baseline of -1.3 % in treatment as usual with smoking-cessation treatment and of -7.6 % in treatment as usual .