Abstract
OBJECTIVES: To compare the effectiveness of group advanced intervention and individual advanced intervention for smoking management in primary health care; b) to know if in group intervention exists an added positive effect due of the group and, if this is true, to characterize it; and c) to know the advantages and inconvenients that the participants attribute to each intervention. DESIGN: Control clinic trial randomized in individual scale. SETTING: Mallorca primary health centers, Spain. PARTICIPANTS: Smokers >5 packet-year or monoxid carbon levels >15 ppm prepared for give up smoking. People younger than 18 years, people with terminal illness, and mental problems will be excluded. INTERVENTIONS: Candidates will be assigned to: a) group intervention; b) individual intervention; or c) short intervention or control group. Interventions will be done by a nurse and a general practitioner. Depth interview will be done for qualitative study. PRINCIPAL MEASUREMENT: Maintained cessation during 12 months confirmed by expired-air carbon monoxide measurement. SECONDARY MEASUREMENTS: Self-declared cessation and confirmed by expired-air carbon monoxide measurement months 1, 2, 3, 6, and 9, and tobacco reduction if there isn't abandonment. ANALYSIS: Intention treatment. Multilevel analysis will be done to determinate the positive effect added of the group if it's proved that exists. Content analysis for qualitative study. DISCUSSION: Randomization will prevent participants will be treated by their general practitioner o their nurse, this can mean worse results than results obtained in practice.