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Biomedical subjects

S C Maerki

Publications and source records attributed to S C Maerki.

7 recordsLinked to original sources
PubMed1987

The volume-outcome relationship: practice-makes-perfect or selective-referral patterns?

Various studies have demonstrated that hospitals with larger numbers of patients with a specific diagnosis or procedure have lower mortality rates. In some instances, these results have been interpreted to mean that physicians and hospital personnel with more of these patients develop greater skills and that this results in better outcomes--the "practice-makes-perfect" hypothesis. An alternative explanation is that physicians and hospitals with better outcomes attract more patients--the "selective-referral pattern" hypothesis. Using data for 17 categories of patients from a sample of over 900 hospitals, we examine the patterns of selected variables with respect to hospital volume. To explore the plausibility of each hypothesis, a simultaneous-equation model is also used to test the relative importance of the two explanations for each diagnosis or procedure. The results suggest that both explanations are valid, and that the relative importance of the practice or referral explanation varies by diagnosis or procedure, in ways consistent with clinical aspects of the various patient categories.

Consumer Behavior↗
PubMed1986

Selecting categories of patients for regionalization. Implications of the relationship between volume and outcome.

A growing number of researchers have demonstrated an inverse relation between the number of patients treated with specific diagnoses or procedures in a hospital and subsequent adverse outcomes. Such findings support the notion that policies should be explored to concentrate patients in selected hospitals to reduce preventable patient mortality or morbidity. The authors used data from 15 diagnoses and procedures demonstrating an inverse relation between volume and mortality to explore the different implications of regionalization policies across categories of patients. In some instances, concentrating patients in hospitals with high volumes of such patients could avert more than 60% of all deaths. For some procedures or diagnoses, however, such mortality savings are either medically infeasible because of the emergency nature of the problem or logistically impossible because of the extent of regionalization implied.

Cost-Benefit Analysis↗
PubMed1986

The competitive effects of health maintenance organizations: another look at the evidence from Hawaii, Rochester, and Minneapolis/St. Paul.

There has been much discussion about the potential cost-containing impact of HMOs upon the local medical care market. Three areas have been identified by various observers as experiencing such beneficial effects: Hawaii, after the development of Kaiser in the late 1950s; Rochester, New York, which experienced rapid HMO growth and declining Blue Cross hospital use in the late 1970s; and Minneapolis/St. Paul, which has been the focus of vigorous HMO competition in the last decade. While comprehensive data on health care expenditures are not available, bits of evidence can be pieced together to develop case studies of each area. Careful review of the available data often identifies internal inconsistencies and contradictions, but in none of the three sites is there a reduction in hospital use that is most plausibly attributed to HMO competition. Instead, the reported reductions are in each case attributable to other factors--including biases in data, long-term trends predating HMOs, indirect effects of other policy changes, and other forms of competition.

Blue Cross Blue Shield Insurance Plans↗
PubMed1986

The role of specialized clinical services in competition among hospitals.

Because duplication of services among hospitals can be costly, it is important to understand the circumstances under which duplication occurs among hospitals within a region. In this sample of 3,584 community hospitals surveyed in 1972, we analyzed the impact of competition on the availability of specialized clinical services, with special focus on mammography, emergency services, cobalt therapy, heart surgery, and cardiac catheterization. We found that the presence of nearby institutions and services increases the availability of most of these services in neighboring hospitals. This supports the hypothesis that competition among hospitals within an open-ended reimbursement environment takes the form of nonprice competition for community-based physicians through the acquisition of expensive clinical facilities.

Cardiac Catheterization↗
PubMed1982

Duplicate health insurance coverage: determinants of variation across states.

Although it is recognized that many people have duplicate private health insurance coverage, either through separate purchase or as health benefits in multi-earner families, there has been little analysis of the factors determining duplicate coverage rates. A new data source, the Survey of Income and Education, offers a comparison with the only previous source of state level data, the estimates from the Health Insurance Association of America. The R2 between the two sets is only .3 and certain problems can be traced to the methodology underlying the HIAA figures. Using figures for gross and net coverage, the ratio of total policies to people with private coverage ranges from .94 in Utah to 1.53 in Illinois. Measures of industry distribution, per capita income and employment explain a large portion of the variance, but it appears that these factors operate in opposite directions for group and non-group policies. Similar sociodemographic variables also explain net coverage. These findings have substantial implications for research and the structuring of employee health benefits.

Analysis of Variance↗