The authority and necessity of the first-order indicator in Jiangsu Province, China.

aThe summary authority is the average of the judgment coefficient and the familiarity;bThe indicator reflects important characteristics of schistosomiasis transmission.a. 综合权威度（summary authority）为判断系数（judgment coefficient）与熟悉度（familiarity）的平均值；b. 该指标可反映血吸虫病（schistosomiasis）传播的重要特征。