Indoor combustion sources like gas range, kerosene heaters, wood-burning appliances and cigarette smoke are potential nitrogen dioxide(NO₂) emitters. For nitrogen dioxide, exposures to indoor air may pose a potentially greater health threat than outdoor air exposures , because most people spend over 90% of their time indoors. However, until recently epidemiological studies of the health effects of air pollution have relied on measurements of ambient air quality that are obtained from fixed location monitoring stations, rather than on the actual exposures of the individuals whose health status is being tested, to draw inferences regarding possible exposure disease relationships. Many epidemiological studies have used house characteristics associated with indoor sources as simplified proxies for personal NO₂ exposure. Range type and presence of a pilot light have often been used as the two key characteristics, but significant overlaps have remained in the NO₂ concentrations in the exposed and unexposed groups. Thus, characterizing residential N02 concentrations can help investigators determine personal exposures and related health effects. In this study, NO₂ levels were measured in total 87 houses. After mean and standard deviation of NO₂ concentrations were obtained, frequency distributions were plotted using Monte-Carlo simulation. Presence of gas range was the most significant factor contributing to indoor NO₂ level in house characteristics (p=0.000). Overlap by one factor like gas range, gas water heater, inside smoker, and attached house were 47.0, 54.7, 41.9, and 54.9%, respectively. Overlap by two factors like gas range and gas water heater, gas range and inside smoker, and gas range and attached house were 34.9, 20.0, 23 .0%, respectively.
I. 서론
II. 조사지역 및 방법
III. 결과 및 고찰
IV. 결론