| Budget impact model | Calculates additional costs to healthcare budget from adopting a new treatment |
| Cost of illness | Studies reporting costs and resource use associated with gastric cancer |
| Cost-benefit | Compares 2 or more interventions by financial outcomes |
| Cost-consequence | Reports costs and clinical outcomes but no formal economic model is conducted |
| Cost-effectiveness | Evaluates the cost to improve a clinically-relevant outcome​ (e.g. life-years gained) |
| Cost-utility | Cost-effectiveness studies assessing the cost to improve quality of life (QALY) and life expectancy |
| Systematic literature review | Systematic literature review of economic evaluations |