This study investigates a descriptive analysis (Analytic Descriptive Research) cross-sectional (Cross Sectional. Studies) to study the factors related to the behavior of prevention of coronary heart disease of middle-aged male in his house, Bangkok. Understand calculating sample size by using the formula. (Daniel 2005: 187), the 315 cases. They were chosen in this study by means of multistage sampling (Multiple stage Random Sampling) the divisions into all 3 sub district Namely, prawet District, District, subdistrict Nong root flowers, which are all 26 prawet District, community, random เลือกม made 6 community District Flower and district Nong root. The district consists of community 6 community by random sampling of each 2 community, in which each community. The random samples in each community until the sample.
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