From weeks @ through @ , @ % ( @ of @ ) among those in the varenicline group vs @ % ( @ of @ ) in the placebo group were continuously abstinent ( OR , @ ; @ % CI , @-@ @ ; P = @ ) , and from weeks @ through @ , @ % ( @ of @ ) in the varenicline group vs @ % ( @ of @ ) in the placebo group were continuously abstinent ( OR , @ ; @ % CI , @-@ @ ; P = @ ) .