ORIGINAL ARTICLE Bali Medical Journal (Bali Med J) 2019, Volume 8, Number 3: 687-690 P-ISSN.2089-1180, E-ISSN.2302-2914 687 Open access: www.balimedicaljournal.org and ojs.unud.ac.id/index.php/bmj CrossMark Published by DiscoverSys ABSTRACT Introduction: Tabaco related death is estimated at 6 million people worldwide and it is portrayed to increase to 8 million in 2030. In ASEAN alone, there were approximately 121 million adult smokers in 2013, in which 50% of them were Indonesian. In Indonesia, it is illegal to sell cigarettes to people under 18 years old, but this regulation has weak feld implementation and the number of under-age smokers is considerably high in Indonesia. Therefore, this study aimed to analyse the efects of knowledge and perception with smoking intention and behaviour among santris at Asrama Perguruan Islam (API) Islamic boarding school. Methods: A mix method study with sequential explanatory approach was conducted API Islamic boarding school in two phases namely qualitatively and quantitatively. 380 santris were enrolled in this study with interviewees for quantitative study was divided into three groups: santri who < 17 years old, santri who > 17 years old, and housekeepers. Results: The results showed that the knowledge signifcantly afected the smoking behaviour while had no infuence toward smoking intention. On the other hand, no signifcant association was observed between perceptions with smoking intention while it signifcantly afected the smoking behaviour. Conclusion: It can be concluded that knowledge and perception were importance factors that infuence smoking behaviour but had no efects toward smoking intention. Keywords: smoking behaviour, smoking intention, santri, factors, Islamic boarding school Cite This Article: Wijayanti, P.M., SuryoPrabandari, Y., Ismail, D., Triratnawati, A. 2019. Factors infuencing smoking behavior and intensity of santri in Asrama Perguruan Islam (API) Islamic boarding school, Tegalrejo, Magelang, Central Java, Indonesia. Bali Medical Journal 8(3): 687-690. DOI:10.15562/bmj.v8i3.1544 Factors infuencing smoking behavior and intensity of santri in Asrama Perguruan Islam (API) Islamic boarding school, Tegalrejo, Magelang, Central Java, Indonesia Punik Mumpuni Wijayanti, 1,2* Yayi SuryoPrabandari, 3 Djauhar Ismail, 4 Atik Triratnawati 5 INTRODUCTION Health promotion is one of the main pillars of public health. Health promotion programs that are supported by public health sciences have huge potential to improve health levels, reducing the risk of disease, improve the welfare of individuals, fami- lies, organizations and communities. 1 Smoking is one of the preventable causes of some of the debilitating chronic disease such as lung cancer, chronic obstructive pulmonary disease, and coronary heart disease etc. 2 Despite the lowering trend in the global number of smoker, in some areas, the statistic tends to be unfavourable. 3 Te most concerning problem regarding smoking behaviour is the tendency of smoking among chil- dren. Tis problem appears to be more prominent in developing countries where lack of education, infrequent health promotion program, and insuf- fcient funding promote the development of such trend. 3 According to Directorate General of Islamic Education of Ministry of Religion, there were 21,521 Islamic boarding schools in Indonesia in 2008/2009 with a total of 7,636,938 santris. In Magelang, there are 173 Islamic boarding schools with a total 24,946 in which 9,796 were female and 15,150 male. 4 According to Central Bureau of Statistics of Central Java in 2014, there were 262 Islamic boarding schools with a total 37,327 santri. 2 One of the known Islamic boarding schools in Central Java is male Islamic Boarding School Asrama Perguruan Islam (API) Tegalrejo, Magelang which has 5200 santris. Te santris in this school aged between 10-30 years old and most of them are smokers. Terefore, this study aimed to evaluate the factors that infuence the smoking behaviour and intention among santris in Islamic Boarding School API Tegalrejo which were important for develop- ing the necessary regulation and intervention to prevent or reduce smoking tendency among them. METHODS Tis study used a Sequential Explanatory Mixed Method approach by combining qualitative and quantitative methods. 5 Te frst phase of this 1 Student in Doctoral Program, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia. 2 Departments of Public Health, Faculty of Medicine, Universitas Islam Indonesia, Yogyakarta 3 Department of Health Behavior, Environmental Health and Social Medicine, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia 4 Child Health Department, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia 5 Anthropology Departments, Faculty of Cultural Science, Universitas Gadjah Mada, Yogyakarta, Indonesia * Correspondence to: Punik Mumpuni Wijayanti; Student in Doctoral Program, Faculty of Medicine, Public Health and Nursing, Universitas Gadjah Mada, Yogyakarta, Indonesia; Departments of Public Health, Faculty of Medicine, Universitas Islam Indonesia, Yogyakarta 027110416@uii.ac.id ; punik.mumpuni.w@mail.ugm.ac.id ; punik_m@yahoo.com Received: 2019-07-07 Accepted: 2019-11-20 Published: 2019-12-01