Zitong Xu

Aug 20, 2023 | mdpi.com | Shan Yang |Zitong Xu |Jianhong Chen |Shengyuan Zhuo

3.2. Establishment of System of Risk-Evaluation IndicatorsThrough the questionnaire survey of the Likert five-point scale method [47], a total of 350 questionnaires were distributed, and 276 questionnaires were recovered at the end of the process, with a recovery rate of 78.9%, and the total final usable questionnaires after removing the invalid questionnaires were 263, with a validity rate of 75.1%.