2.7. Quality control and bias control
To avoid sampling bias and reduce the risk of spatial autocorrelation, we adopted sequential processing, namely the participants were randomly divided into group A and group B according to the test number; in group A, the participants were first measured vital signs and radiation dose rate by a mobile robot and then measured by medical staff, and in group B, the participants were first measured vital signs and radiation dose rate by medical staff and then measured by a mobile robot.It is necessary to ensure that quality control measures are in place throughout the clinical trial process. The following specific quality control measures shall be taken: Standard operating procedure (SOP) training: Unified SOP training shall be conducted for all researchers to be familiar with the specific implementation rules and operating procedures of the clinical trial scheme and to standardize the recording methods and judgment standards.