Study On The Impact Of Residential Environment On Children’s Respiratory Andallergic Diseases In Harbinarea

In recent years, the number of children who suffering from respiratory and allergicdiseases and the symptoms of respiratory and allergic are increasing, these diseases andsymptoms effects on children’s physical and mental health can not be ignored. In orderto explore the relationship between indoor environmental factors and children’srespiratory and allergic diseases and symptoms, furthermore, to identify the impact ofthe main factors in Harbin. In this paper, a cross-sectional survey was used to survey thechildren who studing in fourth and fifth grade in Haebin Engineering Primary, and thecollected datas was replied to eatablish the database for fuither study. With SPSSsoftware, datas analysis and statistical inference were done. Afield test about residentialenvironment was carried out in10families which selected by the case-control principle.In this paper, children’s respiratory and allergic symptoms include persistent cough,persistent phlegm, respiratory allergies, eczema, and asthma, the definition of the abovesymptoms reference to the American Thoracic Society ATS-DLD-78-CM questionnaireconcerning the definition of respiratory and allergic symptoms, while the definition ofallergic diseases is that who has diagnosed by a doctor with allergic diseases. Thechi-squre test was used to analyse the significance of prevance differences and riskfactors （95%confidence interval） of diseases and symptoms in different circumstances.The results showed that the prevalence of respiratory and allergic diseases andsymptoms in keep pets in the home, home renovation, hang wet clothes and perceived"dampness" air in the children’s bedroom, house close to the main roads all hadsignificant difference. By preliminary risk factors analysis, we can got follow results:keep pets at home was a risk factor to allergic diseases （P=0.003，OR=4.421）, homerenovation was a risk factor to some allergic symptoms now（P=0.002, OR=3.519）, hangwet clothes in the children’s bedroom was a protective factor to allergicdiseases（P=0.045, OR=0.387）, perceived "dampness" air in the children’s bedroom tosome allergic symptoms now（P=0.013, OR=0.193）.This paper have selected10homes to do field measurement with case-control study,tesed include PM_2.5, PM₁₀, planktonic fungi, accumulation fungi, fungal adhesion,temperature, relative humidity, CO₂, TVOC, SVOC. The Mann-Whitney U test wasused to PM_2.5, PM₁₀, planktonic fungi, accumulation fungi, fungal adhesion, SVOC datawhich obtained from field measurement, the test results showed that the differerces inthe two groups were not significant, the further research is needed. The two independentsamples t test was used to temperature, relative humidity, CO₂concentration data whichobtained from field measurement, the test results showed that the temperature andrelative humidity differences between the case group and control group was notsignificant, but the difference in CO₂concentration was significant. By correlation analysis, we can draw that PM_2.5and PM₁₀had obvious linear relationship, adhesionbetween fungi and adhesion between relatively humidity all had obvious correlations.Additionally, CO₂was used as a tracer gas to measured residential air changes atdifferent time was introduced details in this paper.