Biomedical subjects
Publications and source records attributed to Mark A Hall.
This report describes an HIV-1-positive patient who presented to the dermatology clinic with a 2-year history of secondary erythermalgia. A review of salient clinical features, disease classification, associated diseases, pathogenesis, and treatment of this disorder is presented.
Public health law needs to differentiate more clearly between public health analysis and public health authority, that is, between the scientific boundaries of epidemiology and tile legal and regulatory boundaries of public health. These boundaries matter because public health law confers tremendous authority on government officials, including some powers that are justified only in situations of extreme urgency. The extent of this legal power explains the inclination of activists to apply public health paradigms to various social problems beyond the traditional origins of public health law; once a causal connection to a widespread health problem is identified, it falls within the authority of public health officials to take whatever actions are necessary to eradicate the threat to health. This approach might lead to dangerous conditions in which public health officials overstep the proper bounds of public health law, even though they arguably are continuing to exercise proper analytical tools for understanding public health problems. Public health authority should remain grounded in traditional conceptions of disease, which depend on a specific agent or behavior that threatens health in a direct and clear manner, and for which a targeted and effective remedy that requires collective action is available. It should not extend to diseases viewed as resulting from social, economic, and political conditions.
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OBJECTIVE: To develop and test a multi-item measure for general trust in physicians, in contrast with trust in a specific physician. DATA SOURCES: Random national telephone survey of 502 adult subjects with a regular physician and source of payment. STUDY DESIGN: Based on a multidimensional conceptual model, a large pool of candidate items was generated, tested, and revised using focus groups, expert reviewers, and pilot testing. The scale was analyzed for its factor structure, internal consistency, construct validity, and other psychometric properties. PRINCIPAL FINDINGS: The resulting 11-item scale measuring trust in physicians generally is consistent with most aspects of the conceptual model except that it does not include the dimension of confidentiality. This scale has a single-factor structure, good internal consistency (alpha = .89), and good response variability (range = 11-54; mean = 33.5; SD = 6.9). This scale is related to satisfaction with care, trust in one's physician, following doctors' recommendations, having no prior disputes with physicians, not having sought second opinions, and not having changed doctors. No association was found with race/ethnicity. While general trust and interpersonal trust are qualitatively similar, they are only moderately correlated with each other and general trust is substantially lower. CONCLUSIONS: Emerging research on patients' trust has focused on interpersonal trust in a specific, known physician. Trust in physicians in general is also important and differs significantly from interpersonal physician trust. General physician trust potentially has a strong influence on important behaviors and attitudes, and on the formation of interpersonal physician trust.
Existing scales to measure trust in physicians have differing content and limited testing. To improve on these measures, a detailed conceptual model was constructed and a large item pool (n = 78) was generated following a detailed conceptual model and expert review. After pilot testing, the best-performing items were validated with a random national sample (n = 959) and a regional sample of HMO members (n =1,199). Various psychometric tests produced a 10-item unidimensional scale consistent with most aspects of the conceptual model. Compared with previous scales, the Wake Forest physician trust scale has a somewhat improved combination of internal consistency, variability, and discriminability. The scale is more strongly correlated with satisfaction, desire to remain with a physician, willingness to recommend to friends, and not seeking second opinions; it is less correlated with insurer trust, membership in managed care, and choice of physician. Correlations are equivalent with lack of disputes, length of relationship, and number of visits [corrected].
OBJECTIVE: To develop a scale to measure patients' trust in health insurers, including public and private insurers and both indemnity and managed care. A scale was developed based on our conceptual model of insurer trust. The scale was analyzed for its factor structure, internal consistency, construct validity, and other psychometric properties. DATA SOURCES/STUDY SETTING: The scale was developed and validated on a random national sample (n = 410) of subjects with any type of insurance and further validated and used in a regional random sample of members of an HMO in North Carolina (n = 1152). STUDY DESIGN: Factor analysis was used to uncover the underlying dimensions of the scale. Internal consistency was assessed by Cronbach's alpha. Construct validity was established by Pearson or Spearman correlations and t tests. DATA COLLECTION: Data were collected via telephone interviews. PRINCIPAL FINDINGS: The 11-item scale has good internal consistency (alpha = 0.92/ 0.89) and response variability (range = 11-55, M = 36.5/37.0, SD = 7.8/7.0). Insurer trust is a unidimensional construct and is related to trust in physicians, satisfaction with care and with insurer, having enough choice in selecting health insurer, no prior disputes with health insurer, type of insurer, and desire to remain with insurer. CONCLUSIONS: Trust in health insurers can be validly and reliably measured. Additional studies are required to learn more about what factors affect insurer trust and whether differences and changes in insurer trust affect actual behaviors and other outcomes of interest.
OBJECTIVE: To test the hypothesis that capitation payment to physicians reduces the length of physician-patient encounters but increases use of preventive and health counseling services. STUDY DESIGN: Cross-sectional analysis of data from the National Ambulatory Medical Care Survey of outpatient physicians and their office staff (1997 and 1998). PATIENTS AND METHODS: A random national sample of 46,320 ambulatory care visits was used. Weight-adjusted multivariate regression techniques were utilized to examine the effects of capitation on duration of physician visit and number of preventive and health counseling services. RESULTS: Physicians spent 5.6% less time (P < .01) with patients in capitated plans than with those in noncapitated plans. The effect of payment method on length of visit was 3.5 times stronger among physicians receiving only capitated payment, compared with physicians receiving only noncapitated payment. Patients in capitated plans were 17% more likely to receive health counseling services (P < .01) than patients in noncapitated plans. Patients under capitation were 3% more likely to receive preventive services compared to patients in non-health maintenance organizations, noncapitated plans (P < .05). CONCLUSIONS: Capitation is associated with a modest decrease in the amount of time physicians spend with their patients and with increased receipt of preventive and health counseling services, on average. These trends are driven by physicians who receive capitated payment predominantly. Physicians with a mix of patients from capitated and noncapitated plans spend approximately equal time with each type of patient, which reflects an ethic of impartiality in medical judgment.
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Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
PURPOSE: This study explored how state managed-care patient protection laws affect health insurers' criteria for medical necessity, using bariatric surgery for weight reduction as a case in point. METHODS: Six states and three national insurers were selected for in-depth case studies to represent a range of market, demographic, and legal conditions. In each state, 10-12 qualitative interviews were conducted in 2002 with insurers, regulators, providers, and healthcare attorneys, for a total of 71 interview subjects. RESULTS: Denials of coverage for bariatric surgery are a frequent source of appeals to external review, and external reviewers frequently overturn these denials. However, few insurers feel pressured to approve most or all requests for coverage because external review decisions do not set binding precedents. Instead, insurers continue to assert their own criteria for medical necessity, relying on the insurance contract's general definition of medical necessity. Some insurers, however, specifically exclude all weight reduction surgery because of the difficulty of defending case-by-case denials on appeal. CONCLUSIONS: Unlike most areas of medicine, in which health insurers have greatly scaled back their past efforts to scrutinize medical necessity, for bariatric surgery, many insurers continue to apply a more stringent standard for medical necessity than the one that independent practicing physicians use.
Changes in healthcare financing increasingly rely upon patient cost-sharing to control escalating healthcare expenditures. These changes raise new challenges for physicians that are different from those that arose either under managed care or traditional indemnity insurance. Historically, there have been two distinct bases for arguing that physicians should not consider costs in their clinical decisions--an "aspirational ethic" that exhorts physicians to treat all patients the same regardless of their ability to pay, and an "agency ethic" that calls on physicians to be trustworthy advisors to their patients. In the setting of greater patient cost-sharing, physicians' aspiration and agency roles increasingly conflict. Satisfactorily navigating the new terrain of consumer-driven healthcare requires physicians to consider these two roles and how they can best be reconciled so as to maximize quality of care while respecting the heterogeneity of patients' financial resources and willingness to pay.
PURPOSE: Fear of genetic discrimination might deter participation in research or therapy. This is a major impetus for laws limiting insurers' use of genetic information, yet there is little information about the extent of this fear in the general population and how it varies by social factors. METHODS: This study measures concern about insurance problems relating to genetic testing, as part of primary-care screening for hereditary hemochromatosis (iron overload). Data come from a multiethnic, primary care-based survey of 86,859 adults in five field centers in the United States (AL, CA, DC, HI, OR), and one in Canada (Ontario). Logistic regression was used to model the probability of agreeing to the question "Genetic testing is not a good idea because you might have trouble getting or keeping your insurance." RESULTS: Overall, 40.0% of participants agreed. Adjusting for other characteristics, African Americans and Asians were much less likely (OR = 0.52 and 0.39), and Hispanics were more likely (OR = 1.124), than Caucasians to express concern about insurance discrimination. Participants under 65 years old, US residents, and those without a high school diploma were substantially more likely to be concerned (ORs ranging from 1.4-1.6), as were participants with lower mental health scores. Education showed a nonlinear relationship, with significantly higher concern among both those with less than a high school education and those with a college degree, compared to high school graduates. CONCLUSIONS: Concern about genetic discrimination varies substantially by race and other demographic factors and by nationality. One possible explanation for lower concern about Canadians and by people over 64 is that both groups are covered by social insurance for health care (Medicare). However, US residents in states with some legal protections against genetic discrimination had more, not less, concern than either Canadians or US residents in states with no legal protections.