From the Schools of Medicine (Dr Balas and Ms Boren) and Business and Public Administration (Dr West), University of Missouri, Columbia; School of Medicine, University of Regensburg, Germany (Drs Kretschmer and Nerlich and Mr Gnann); School of Medicine, University of Alabama, Tuscaloosa (Dr Centor); School of Business, Washington University, St Louis, Mo (Dr Gupta); College of Business, Iowa State University, Ames (Dr West); and School of Business, University of Washington, Seattle (Dr Soderstrom).
Objective.— In the present era of cost containment, physicians need reliable data
about specific interventions. The objectives of this study were to assist
practitioners in interpretation of economic analyses and estimation of their
own costs of implementing recommended interventions.
Data Sources.— MEDLINE search from 1966 through 1995 using the text words cost or expense and medical subject heading
(MeSH) terms costs and cost analysis,
cost control, cost of illness, cost savings, or cost-benefit analysis.
Study Selection.— The 4 eligibility criteria were clinical trial with random assignment;
health care quality improvement intervention tested; effects measured on the
process or outcome of care; and cost calculation mentioned in the report.
Data Extraction.— After independent abstraction and after consensus development, financial
data were entered into a costing protocol to determine which costs related
to the intervention were provided.
Data Synthesis.— Of 181 articles, 97 (53.6%) included actual numbers on the costs of
the intervention. Of 97 articles analyzed, the most frequently reported cost
figures were in the category of operating expenses (direct cost, 61.9%; labor,
42.3%; and supplies, 32.0%). General overhead was not presented in 91 (93.8%)
of the 97 studies. Only 14 (14.4%) of the 97 studies mentioned start-up costs.
The text word $ in the abstract and the most useful
MeSH index term of cost-benefit analysis appeared
with nearly equal frequency in the articles that included actual cost data
(37.1% vs 35.1%). Two thirds of articles indexed with the MeSH term cost control did not include cost figures.
Conclusions.— Statements regarding cost without substantiating data are made habitually
in reports of clinical trials. In clinical trial reports presenting data on
expenditures, start-up costs and general overhead are frequently disregarded.
Practitioners can detect missing information by placing cost data in a standardized
protocol. The costing protocol of this study can help bridge care delivery
and economic analyses.
Balas EA, Kretschmer RAC, Gnann W, West DA, Boren SA, Centor RM, Nerlich M, Gupta M, West TD, Soderstrom NS. Interpreting Cost Analyses of Clinical Interventions. JAMA. 1998;279(1):54-57. doi:10.1001/jama.279.1.54