OBJECTIVE To assess what family physicians need to promote smoking cessation by looking at current knowledge, attitudes, and behaviours and to examine the barriers facing physicians in implementing an effective antismoking strategy. DESIGN Cross-sectional study involving face-to-face interviews andmailed questionnaires. SETTING Family practices in Kingston, Ont, and surrounding areas. PARTICIPANTS All family physicians (n= 155) in the City ofKingston and the counties of Frontenac, Lennox, and Addington.

MAIN OUTCOME MEASURES Knowledge, attitudes, beliefs, and practices concerning smoking cessation; barriers and practices recommended in the literature. RESULTS Response rate was 77%. Many physicians know about smoking cessation, and many actively counsel their patients to quit. Brief advice, nicotine replacement therapy, self-help materials, and follow-up appointments are the most common methods. Although many report that they are already knowledgeable, many are willing to learn more. Many physicians have unrealistically high estimates of the probability ofsuccess, and many find poor compliance among patients to be the greatest barrier.