Prospective Employer-Initiated Whole-Body Cancer Screening-Costs and Outcomes of a Cancer Screening Program in Japan.

PURPOSES:To determine cancer detection and mortality and its costs associated with employee-initiated, prospective whole-body cancer screening program in an engineering company in Hamamatsu, Japan. MATERIALS AND METHODS:The program includes whole-body fluorine-18-2-fluoro-2-deoxy-D-glucose PET/CT, brain and pelvis MR, and abdominal ultrasound, offered every 2 years five consecutive times. Employees are free to opt in or opt out anytime. The subjects were divided into the full (five consecutive screenings), partial (more than once and less than five), and no participation groups. The rate ratio of cancer detection rate and cancer-related mortality and cancer-related costs of care were measured. All employees also received other annual health screenings, including chest radiograph or upper gastrointestinal study. RESULTS:Among 1,213 subjects, 543 employees were under full participation, 318 were under partial participation, and 352 were under no participation. In all, 26, 9, and 19 cancers were detected from the full participation, partial participation, and nonparticipation groups, respectively. No statistical significance was observed in the cancer detection rate ratio. The rate ratio of cancer-related deaths was 0.11 (0.01-0.90) for the full participation group compared with the nonparticipation group, and the difference was statistically significant. The cost of cancer-related care was highest among the nonparticipation group; however, the difference was not statistically significant (P = .108). CONCLUSION:Whole-body cancer screening can successfully reduce cancer-related mortality and costs of cancer-related care. The cancer detection rate was not significantly improved because of broad implementation of additional annual health screenings offered to all employees at no cost, resulting in the high baseline cancer detection rate.