Methods Delphi method was applied to form the sketch of index system. Reliability, validity, positive coefficient, Kendall coefficient and authoritative coefficient were adopted to test the credibility of this study.

• 方法 采用专家咨询法对拟定的指标体系进行评判,运用两轮专家咨询问卷的信度、效度以及专家的积极系数、权威系数和协调系数等指标对本研究的可靠性进行分析;