Three versus six months of adjuvant chemotherapy for colorectal cancer: A multi-country cost-effectiveness and budget impact analysis.
7076 Background: The international Short Course Oncology Treatment (SCOT) trial demonstrated non-inferiority and significantly less toxicity of 3 versus 6 months of adjuvant chemotherapy for patients with colorectal cancer (CRC). This study assesses the value of shorter treatment and the economic implications of implementing the findings from the perspective of the countries that participated in the SCOT trial. Methods: Individual patient level data (n=6055) from the SCOT trial was used in a fully-pooled, cost utility analysis for the six participating countries. The incremental net monetary benefit (INMB) per patient was calculated using a willingness to pay threshold of one Gross Domestic Product per capita for each country. Responses to a clinician questionnaire (n=265 across 21 countries collected in April 2019) were used to estimate extent of practice change. The budget impact over 5 years of using shorter treatment was calculated, using 2019 and US dollars (USD) as the base year and currency, respectively. Results: Cost drivers for differences between the SCOT trial arms were reduced chemotherapy costs and fewer hospitalisations in the first treatment year. The INMB per patient of using shorter treatment and subsequent monetary impact on healthcare provider budgets resulting from implementation are shown in Table. This is a cost saving treatment strategy in all countries. The budget impact over 5 years amounts to savings of nearly half a billion USD. Conclusions: The economic burden of CRC treatment globally exceeds $39 billion per annum. Understanding the costs and consequences of widespread clinical practice change is important for optimal budget planning. This study has widened the transferability of results from a phase III cancer trial, showing shorter treatment is cost-effective from a multi-country perspective. The vast savings could provide benefit elsewhere within a limited healthcare budget, and justify the investment in conducting the SCOT trial. [Table: see text]