Figure 4.

Analysis of the reasons for screening failure. The Pareto chart shows that 20% of the reasons for screening failure accounted for 80% (*, 79.07% is close to 80%) of the screening failure cases and that the top five reasons for screening failure, i.e., laboratory test results, vital sign examination results, withdrawal of informed consent, the top five reasons for screening failure height/weight examination results, and ECG examination results accounted for 79.07% of screening failures; therefore, the above reasons for screening failure require special attention. ECG, electrocardiogram.