The study of characteristics of regional time activity pattern and health risk estimation
| Autor: | Mei-Ying Liu, 劉梅瑛 |
|---|---|
| Rok vydání: | 2007 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 95 When conducting health risk assessment, the results of risk estimation will be affected by parameters such as body weight, duration of exposure, frequency of exposure, ingestion rate, and concentration of pollutant. In Taiwan, due to lack of appropriate data, the default exposure parameters suggested by USEPA were used to estimate risk in most cases. However, due to cultural and racial difference, using these default values may generate uncertainties during the estimation process. Therefore, collection of regional exposure parameters to reflect the real exposure condition is a necessary step for risk assessment. The purposes of this cross-sectional study were to establish 24-hour time activity pattern for the residents living in the vicinity of the Central Taiwan Science Park. We selected three counties including Situn, Salou and Daya as our study target area. In order to understand the time-activity pattern for differ gender and age groups, we use 24-h recall time-activity pattern questionnaires to investigate. A self-administered structural questionnaire survey was conducted. A convenient sample of 615 residents was recruited. The results of this study showed that：（1）The residents living in these three counties spent about 89.2%-90.1% of a day in indoor environment. The time spent outdoor is in the range 5.1%-5.8%. The urban community compare with the village community in the home have been more than nearly 2 hours. (2) Generally, age greater than 65 (19.6 h) and 0-6 children (18.2 h) are characterized by the longest periods at home. In the four age groups we found that for children under 6 years of age and greater than 65, the difference between the percentage at home were less than 7.8%-13.9% in other age groups. (3)Time-activity pattern was statistically different between male and female. Women spent more time at home than men (1.6h). (4) On weekend of households spend time into 4 major locations (indoors at home, indoors-other, outdoors, in vehicle) more than on weekday. Furthermore, indoors-other time is lower on weekday than on weekend (2.3 h), especially of indoor time and outdoor time were statistically significant. (5) Non-smokers (70.8%) stay longer at home compared to smokers (77.9%). The serious disease history is a result of spending a long time at home. (6) The current analysis shows that area, gender, and age influence time-activity patterns. Regional living characteristics can be a factor contributing to this result. Therefore, when conducting risk assessment, it is strongly suggested that regional time-activity pattern study should be included so that a reasonable risk estimation can be obtained. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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