ABSTRACT
Objective To analyze the characteristic influence and deviations caused by the face effect to the survey outcomes of the patient perceived value (PPV) of medical treatment.Methods Based on the theoretical research,a PPV test & evaluation plan is designed for two groups of patients.Comparative study of outcomes of the two groups aims at identifying patterns in this regard.Results Findings of the patients evaluation showed that the face effect poses strong interference for the survey outcomes,as it significantly raises the evaluation outcomes.Among the factors causing face effect,characteristics of the investigator in the survey are found to be the most important stimulating,which include the power distance and the strength of relationship between patients and the hospital.Such factor will push higher the subjective PPV of the patient,while the general satisfaction of the medical workers in the survey can be 0.24 higher than that of third-party survey.In addition,friends and patients in the same wards are also an important factor to cause the face effect of the patient,while such factor works at a wide range to push higher both objective and subjective estimation value of the patient.For joint actions of the investigator and the reference group,the general satisfaction between the two-high scenario and the two-low one can be up to 39.43％.Conclusion The PPV surveys should minimize interference of the face effect by means of evaluating environment redesign,avoidance of the friends and relatives,and selection of optimal investigators,for the purpose of eliminating interference of the face effect.