Economic evaluation
We calculated each arm’s fixed and variable economic costs using a micro-costing approach. We annualized cost items (e.g. computers) using a 3% rate over the item’s lifespan. We excluded direct research-related costs. We present the total economic costs, cost per person tested, and the incremental cost-effectiveness ratios (ICER) of HCV self-testing compared with SOC for each trial. The currency exchange rate was RMB 1 = US$ 0.157, using OANDA (January 2022).