The dose increase also had no effect on smoking cessation rates for varenicline vs placebo at @ week ( @ -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- , P = @ ) , @ weeks ( @ -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- , P = @ ) , and @ weeks ( @ -LSB- @ % -RSB- vs @ -LSB- @ % -RSB- , P = @ ) after the TQD .