본 연구는 안산시 소재 중, 고등학생의 흡연실태 및 건강 행태를 조사하기 위해 각 구별로 층화하여 각 학교를 표본 추출하였다.
In order to investigate the smoking status and health behavior of middle and high school students located in Ansan-si, this study was stratified into each category and sampled from each school.