Det vigtigste mål for effekt var antallet af patienter, som helt var holdt op med at ryge i 4 uger (mellem uge 9 og uge 12 i forsøget), bekræftet af laboratorieundersøgelse af patienternes ånde for tegn på rygning.
The main measure of effectiveness was the number of patients who had completely stopped smoking for 4 weeks (between week 9 and week 12 of the study), confirmed by laboratory testing of the patients ’ breath for signs of smoking.