Comprehensive health checkups in Japan are a preventive method to detect cancer and metabolic diseases. Unlike group medical examinations, individual examinations in health checkups are possible, with additional tests possible for disease detection. However, it is difficult to accurately ascertain the results from only the report after referral to a medical institution in individuals suspected of having cancer who need to be examined. We aimed to conduct a medical record survey of patients referred to the Hospital after undergoing a comprehensive health checkup and investigate the contribution of comprehensive health checkups to the detection of cancer more accurately. The subjects were 1763 examinees who were referred to various departments of our hospital because of doubtful cancer from 23,128 examinees who underwent comprehensive health checkups in our center from January 2018 to December 2022 for 5 years. The medical record survey demonstrated that cancer was detected in more than twice as many individuals as reported and other sources. Early-stage cancers require a significantly longer time to establish a definitive diagnosis. In conclusion, short-term reports from the referring hospital are insufficient for a final diagnosis, and long-term follow-up is extremely important to increase the diagnosis rates of cancer for comprehensive health checkups.
Keywords: COVID-19; abdominal ultrasound; cancer screening; comprehensive health checkup; medical record survey.