本研究運用計畫行為理論（Ajzen,1985）為研究架構，目的在了解吸菸糖尿病人的戒菸行為意圖。研究對象為台北市某醫學中心有吸菸的糖尿病人，以橫斷式調查進行研究，樣本數共120 份。研究結果如下：1.個人背景因素，男生109 人、女生11 人，平均54.5 歲，糖尿病史平均7.1 年，有合併症者佔25%。2.本研究對象未來2個月內可能或一定會戒菸者佔33.3%，沒有意圖及不確定者佔66.7%。3.研究對象的態度和戒菸行為意圖的相關最高，知覺行為控制其次，主觀規範最弱，三者與行為意圖有顯著水準，都呈現正相關。4.研究對象的戒菸態度與行為信念、結果評價的乘積和，主觀規範與規範信念、依從動機的乘積和，知覺行為控制與控制信念、知覺力量的乘積和有顯著水準，皆達正相關。5.態度和知覺行為控制對戒菸意圖之整體解釋力達R^2=64%，且態度對戒菸行為意圖的預測力較強。

To understand the intention and behavior of smoking cessation in diabetic patients, we conduct a cross sectional study based on the Theory of Planned Behavior. We recruited 120 diabetic patients in a medical center in Taipei. The results are as the following: (1)109 male and 11 female with mean age of 54.5 years old were recruited. Their duration of diabetes was 7.1 year. 25% of them were with comorbidities of diabetes. (2) Among the 120 participants, 33.3% showed intention of stopping smoking in the next 2 months, 66.7% had no intention with uncertainties. (3) Attitudes, perceived behavioral control and subjective norm were all positively correlated with these patients behavioral intentions of smoking cessation, with Attitudes＞ Perceived behavioral control ＞Subjective norm. (4) Conviction of quit attitude, behavior and the results of the evaluation of the product positively correlated. There were significant level, and strong positive correlation between the subjective norms, normative beliefs, motivation of the product, perceived behavioral control and control beliefs, the product of perception and power. (5) Attitude and perceived behavioral control predict behavioral intention of quitting smoking in diabetic patient with R^2=64 by multiple regression analysis.