Remaja dan Perilaku Merokok
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The World Health Organisation said that the number of smokers in the world as much as 30% are teenagers. Research in Jakarta showed that 64.8% of men over the age of 13 years were smokers (Tandra, 2003). Male smokers is much higher than the number of female smokers. Indonesian Cancer Foundation (ICF) found 27.1% of 1961 respondents male students of SMA / SMK, already started or even used to smoke (Sirait, 2001). The purpose of this study was to determine the smoking habits of teenagers, the influence of intrinsic and extrinsic factors on smoking behavior in teenagers. This type of research is observational analytic cross sectional study design. This research was conducted in SMK Muhammadiyah Kudus in January 2016. The population in this study were all students of SMK Muhammadiyah Kudus 2015/2016 academic year ( 1148 students), the number of samples obtained by 32 students with accidental sampling techniques Primary data were collected using a questionnaire. Data analysis using bivariate and multivariate analyzes. Bivariate analysis between the variables X1 to Y and X2 to Y using Fisher's exact test. The multivariate analysis using logistic regression test . There are a number of research results 21.8% of students (teenagers) are smoker .There are 57.1% of the total number of students (teenagers) smoke spent ≥ 1 pack of cigarettes for a day. There are 71.4% of the total number of students (teenagers) begin a smoker since age <15 years.There is intrinsic factors effect on smoking behavior in teenagers . There is the influence of extrinsic factors on smoking behavior in teenagers. Taken together intrinsic factors likely 0062 compared with only 0:00 extrinsic factors in influencing students (teenagers) behaves smoking.