[Checklist for the Development and Assessment of Cost-of-Illness Studies]

Cost-of-illness (CoI) studies are important instruments for estimating the socioeconomic burden of specified diseases. CoI studies provide important information about the cost structure of a disease, the resulting research need, approaches to improve aspects of care and, monetary consequences from different perspectives. This information can be useful for healthcare research and health policy. Due to heterogeneity of available Cost-of-Illness studies, the working group 'Health Economics' of the German Network for Healthcare Research (DNVF) in accordance with the German Society for Health Economics (DGGÖ) developed an instrument for the planning, conduct and assessment of CoI studies.

The checklist was developed based on a systematic literature search of published national and international checklists as well as guidelines and recommendations for development and assessment of CoI studies and health economic evaluations. Structure and subject matter of the generic checklist was designed, approved and, finally, examined in a pretest by the working group.

Based on the results of the literature search (n=2 454), 58 articles were used for the identification of relevant criteria for the checklist. With respect to the results of the pretest, 6 dimensions were included in the checklist: (i) general aspects, (ii) identification of resources, (iii) description and quantification of resource consumption, (iv) valuation of resources (v) analysis and presentation of results and (vi) discussion and conclusion. In total, the 6 dimensions were operationalized through 37 items.

This checklist is an initial approach to improve transparency and understanding of CoI studies in terms of the extent, structure and development of the socioeconomic burden of diseases. The checklist supports the comparability of different studies and facilitates study conception.