Economic Evaluation of Health Interventions: A Critical Review.

Background: Economic evaluation is used for the optimal allocation of resources in the health sector. While a large number of economic evaluation studies have been conducted, there is less critical review of these studies. We critically examined the economic evaluation studies of preventive health interventions.

Methods: The study was carried out using critical review method. Seven databases (i.e., PubMed, Cochrane Database of Systematic Reviews, Web of Science, Science Direct, Scopus, Springer Link, and Elsevier) were searched to find articles on economic evaluation of health interventions published from 1985 to 2018. In addition, the references of retrieved studies were hand screened for articles that were not indexed in these databases. Finally, 206 articles, including 33 cost- benefit analysis, 146 cost- effectiveness analysis, and 27 cost-utility analysis were included in this study. These studies were critically evaluated using a checklist of 11 criteria.

Results: Only 20% of the studies met all the methodological criteria of health economic evaluation. The cost perspective, costs type, cost data source, and cost measurement were not explained and discussed in 17%, 20%, 5%, and 33% of studies respectively. Outcome data sources and outcome valuation method were only mentioned in 53% and 69% of studies. The sensitivity analysis and results' generalizability were not reported in 16% and 46% of studies.

Conclusion: The quality of economic evaluation studies is low, and it can be misleading if resource allocation decisions are made using this evidence. Authors should use valid protocols to conduct and report economic evaluation studies, and journals' editors should use valid checklists to evaluate these articles.