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The Mediating effect of Public Transportation Satisfaction on Body Mass Index according to Walking days in Korea middle aged

한국 중년의 대중교통 만족도에 따른 체질량지수에 대한 걷기 일수의 매개효과

  • Kim, Myung-Gwan (Graduate School of Department of Public Health, Kyungpook National University) ;
  • Lee, Eun-Ju (Department of Dental Hygiene, Busan Institute of Science and Technology)
  • 김명관 (경북대학교 대학원 보건학과) ;
  • 이은주 (부산과학기술대학교 치위생과)
  • Received : 2018.03.29
  • Accepted : 2018.06.01
  • Published : 2018.06.30

Abstract

This study was conducted to investigate the mediating effects of walking days on body mass index (BMI) according to the public transportation satisfaction of middle aged Koreans aged 40-59 in Korea using the 2015 community health survey data. The purpose of this study was to provide basic data for provision of the neighborhood environment and support programs for the walking activity and promotion of daily walking activities among middle aged people. Among 228,558 individuals, 85,344 middle aged people aged 40-59 years were selected as final subjects for analysis. The data were analyzed with the open source statistics program R 3.4.1 to determine whether the number of walking days had a mediating effect on body mass index (BMI) as an independent variable. The Sobel test revealed that the number of walking days increased by B=0.010(p=.010), and that when the satisfaction with public transportation increased, B=-0.052 (p=.021), the number of walking days decreased by B=-0.038 (p=.001). To increase the number of walking days and decrease the body mass index by increasing public transportation satisfaction by increasing the use of public transportation, public transportation fare adequacy and access convenience among the public transportation satisfaction mentioned above should be improved more than the current level. It is not easy for individuals that live in small cities to reach their destination by public transportation after leaving the metropolitan area; therefore, improvement of public transportation systems is necessary to improve health.

본 연구는 2015년 지역사회건강조사 자료를 사용하여 한국의 40~59세 중년의 대중교통 만족도에 따른 체질량지수(BMI)에 대한 걷기 일수의 매개효과를 파악하고자 하였다. 본 연구의 목적은 중장년층의 일상적인 걷기활동 지원 및 증진을 위한 근린환경의 제공, 걷기활동 지원 프로그램 마련에 필요한 기초자료를 제공하고자 한다. 지역사회건강조사 원시데이터의 228,558명 중 사용변수에 대해 결측값을 제거하고 40~59세 중년 85,344명을 최종분석 대상자로 선정하였다. 종속변수는 체질량지수(BMI)로 대중교통 만족도를 독립변수로 걷기 일수가 매개효과가 있는지에 대해 자료의 분석은 R 3.4.1로 시행하였다. Sobel test로 매개효과를 검증해 본 결과 대중교통 만족도가 증가하면 걷기 일수는 B=.010(p=.010)만큼 증가하였고, 대중교통 만족도가 증가하면 체질량지수는 B=-.052(p=.021)만큼, 걷기 일수는 B=-.038(p=.001) 감소하였다. 이에 따른 대중교통 만족도와 체질량지수에 대한 걷기 일수의 매개효과는 Sobel z=2.300(p=.021)로 대중교통 만족도가 증가하면 걷기 일수가 증가하고, 그로 인해 체질량지수가 감소하는 매개효과가 존재하는 것으로 나타났다. 대중교통 만족도를 높여 대중교통 이용을 증가시킴으로서 걷기 일수를 증가시키고 체질량지수를 감소시키기 위해서는 고찰에서 언급했던 대중교통 만족도 중 대중교통 요금의 적절성과 접근편리성을 지금 수준보다 더욱 향상시켜야 한다. 아직까지는 수도권이나 대도시를 벗어나 중소도시로 가게 되면 대중교통으로 목적지에 도달하는 것이 불편한 경향이 나타나므로 건강을 향상시키기 위해서는 대중교통 시스템의 개선이 필요하다.

Keywords

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