Application of weighted change comprehensive evaluation method on qir quality in the hospital waiting room

8 hospitals were stratified random sampled and 6 indices were measured in one waiting room of each hospital. The air quality of these hospitals was evaluated with weighted change comprehensive evaluation method. All of the air quality indices, including temperature, carbon dioxide and total number of bacteria met the national hygienic standards. But for PM₁₀, only one hospital met the national standard, air quality of SY is the best in the hospital waiting room, air quality of YY is the worst in the hospital waiting room in eight hospitals. The sequence from better to worse is SY, SYFY, J G, LC, JX, ZXY, GZ and YY.