[Effectiveness of the "Five-Day Plan to Stop Smoking" in a city in Argentina].

Objectives: To evaluate the effectiveness of the "Five-Day Plan to Stop Smoking" at the end of the intervention and after one year in a sample of participants in the city of Rosario, Santa Fe, Argentina.

Methods: The quasi-experimental, longitudinal, prospective cohort, comparative study was based on the evaluation of the effectiveness of the "Five-Day Plan to Stop Smoking" in Rosario, Argentina, with eight groups of participants. Each session of the five-night course included presentations on medical aspects of smoking, an emphasis on group support in quitting, and relaxation techniques.