An Application of the Geographical Information System to Analyzing of Risk of Hemorrhagic Fever Occurrence in Changwat Nong Bua Lam Phu

AUTHOR Mrs. Julaporn Chaiyarat

ADVISORS Assoc.Prof.Wirat Pongsiri and Asst.Prof. Jirattha Phubunop

DEGREE M.P.H. MAJOR Management of Public Health Information

UNIVERSITY Mahasarakham University DATE 2005

ABSTRACT

The purposes of this study were to investigate factors at risk of hemorrhagic fever occurrence in changwat Nong Bua Lam Phu, and to construct an area model for analyzing levels of risk of hemorrhagic fever occurrence in Changwat Nong Bua Lam Phu by applying the geographical information system which used thesecondary source data consistiong of information involving a total of 1, 145 hemorrhagic fever patients in Chngwat Nong Bua Lam Phu. These patients were divided into 476 dengue fever patients, 549 hemorrhagic fever patients, and 120 shock hemorrhagic fever patients who were all sick during 1999-2003. Also, data involving factors of risk of hemorrhagic fever occurrence were included. The instrument used collecting data was a questionnaire already evaluated by experts. The data were analyzed by the uses of percentage, mean, standard deviation the multiple logistic regression analysis. Then area information was presented by using the package program by mens of overlapping information.

The study results were as follows :

There were totally 7 factors of risk of hemorrhagic fever occurrence in Changwat Nong Bua Lam Phu in this study. The factors of risk of hemorrhagic fever occurrence were ; density of population (p-value = 0.014), density of households (p-value = 0.001), andpatients’age group (p-value = 0.000). All these 3 factors had predicting powers of hemorrhagic fever occurrence at 7.1 percent (Nagelkerke R² = 0.071). Then the factors of risk of hemorrhagic fever occurreence in Changwat Nong Bua Lam Phu were constructed into an area model for analyzing levels of risk of hemorrhagic fever occurrence by applying geographical information from a total of 59 tambon in Changwat Nong Bua Lam Phu. It was found that 30 tambon were at risk of hemorrhagic fever occurrence at a high level, and 29 tambon at risk of hemorrhagic fever occureenece at a mdium level.

In conclusion Changwat Nong Bua Lam phu People who lived in the areas with medium density of population, low to medium density of households, And age group of 6-12 years had a chance to be at risk of having hemorrhagic fever. Therefore, everyone had a chance to be at risk of having hemorrhagic fever because in the area model for analyzing the levels of risk of hemorrhagic fever occurrence by applying the geographical information system, and each tambon in Changwat Nong Bua Lam Phu was regarded as located in the area at risk of hemorrhagic fever occurrence at medium to high levels. It was greatly necessary for these people to prevent themslves in every way from not allowing mosquitoes to bite them. This would not provide a chance to receive a virus which could cause them to become sick of hemorrhagic fever in the future.