A randomized evaluation of a computer-based physician's workstation: design considerations and baseline results
| Autor: | Rotman, B. L., Sullivan, A. N., McDonald, T., DeSmedt, P., Goodnature, D., Higgins, M., Suermondt, H. J., Young, C. Y., Owens, D. K. |
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| Jazyk: | angličtina |
| Rok vydání: | 1995 |
| Předmět: |
Quality Assurance
Health Care Point-of-Care Systems Ambulatory Care Information Systems Online Systems Drug Costs Drug Utilization Clinical Pharmacy Information Systems Research Design Outcome Assessment Health Care Humans Drug Interactions Practice Patterns Physicians' Research Article Retrospective Studies |
| Popis: | We are performing a randomized, controlled trial of a Physician's Workstation (PWS), an ambulatory care information system, developed for use in the General Medical Clinic (GMC) of the Palo Alto VA. Goals for the project include selecting appropriate outcome variables and developing a statistically powerful experimental design with a limited number of subjects. As PWS provides real-time drug-ordering advice, we retrospectively examined drug costs and drug-drug interactions in order to select outcome variables sensitive to our short-term intervention as well as to estimate the statistical efficiency of alternative design possibilities. Drug cost data revealed the mean daily cost per physician per patient was 99.3 cents +/- 13.4 cents, with a range from 0.77 cent to 1.37 cents. The rate of major interactions per prescription for each physician was 2.9% +/- 1%, with a range from 1.5% to 4.8%. Based on these baseline analyses, we selected a two-period parallel design for the evaluation, which maximized statistical power while minimizing sources of bias. |
| Databáze: | OpenAIRE |
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