Effect of written and computerized decision support aids for the U.S. Agency for Health Care Policy and Research depression guidelines on the evaluation of hypothetical clinical scenarios.

OBJECTIVE: The objective of this study was to compare the effects of written and computerized decision support aids (DSAs) based on U.S. Agency for Health Care Policy and Research depression guidelines. METHODS: Fifty-six internal medicine residents were randomized to evaluate clinical scenarios using either a written or a computerized DSA after first assessing scenarios without a DSA. The paired difference between aided and unaided scores was determined for diagnostic accuracy, treatment selection, severity and subtype classification, antipsychotic use, and mental health consultations. RESULTS: Diagnostic accuracy with the written DSA increased from 64% to 73%, and with the computerized DSA decreased from 67% to 64% (P=0.0065). Residents using the computerized DSA (vs. no DSA) requested fewer consultations (65% vs. 52%, P=0.028). In post hoc analysis, the written DSA increased sensitivity (66% to 89%, P<0.001) and the computerized DSA improved specificity (66% to 86%, P=0.0020) but reduced sensitivity (67% to 49%, P = 0.011). CONCLUSIONS: A written DSA improved diagnostic accuracy, whereas a computerized DSA did not. However, the computerized DSA improved specificity and reduced mental health consultations.

Internal medical residents' ability to diagnose and characterize major depression.

The purpose of this study was to assess medical residents' knowledge of symptom criteria and subtypes of major depressive episode and their accuracy in diagnosing major depressive disorders and classifying episode severity and subtype according to criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition. Thirty-five third-year internal medicine residents completed a self-administered, written instrument containing 2 open-ended questions and 21 hypothetical scenarios. The sensitivity for recognizing major depressive disorder was 64%, and the specificity was 69%. The sensitivity for classifying severity was 86% for mild, 66% for moderate, 71% for severe, and 66% for severe with psychosis. Misclassification of severity was most commonly to a less severe class. For scenarios with a diagnosable subtype of a major depressive disorder, the sensitivity for classification was 34% for atypical, 51% for catatonic, 74% for melancholic, 100% for postpartum, and 94% for seasonal depression. When asked to enumerate the criteria symptoms for depression, 80% or more of the residents listed sad mood, loss of interest, weight change, and sleep disturbances; 14 to 21 (40%-60%) listed thoughts of death and worthlessness; other criteria were listed by 7 to 11 (20%-31%). When asked to list the episode subtypes, none was listed by more than 3 (9%) residents, although 13 (37%) residents volunteered psychotic as a subtype. Residents frequently failed to recognize the presence or absence of major depressive disorder and often misclassified episode severity and subtype on scenarios. Few could spontaneously list the episode subtypes. Methods must be developed to improve the recognition and classification of major depressive episodes to better direct treatment.

Internal medicine residency training and outcomes.

OBJECTIVE: To review the impact of the clinical education of internal medicine residents on patients' outcomes. DATA SOURCES AND STUDY SELECTION: English-language studies of the relation between internal medicine housestaff training and patients' outcomes were systematically identified by a MEDLINE search and from bibliographies and reference lists of recently published articles. MAIN RESULTS: We hypothesized that the primary impact of internal medicine residency training on patients' outcomes would be the result of: (1) the inexperience of the residents; (2) the heavy workload these inexperienced residents are expected to manage: or (3) some structural feature of the internal medicine teaching services, such as the discontinuity of patient care inherent in night float systems and the fact that residents rotate to different services each month. We also hypothesized that residents may in may ways provide superior care, and many actually improve certain patient outcomes. Housestaff inexperience, workload, and structural features that promote discontinuity have been shown to affect especially outcomes of resource utilization, length of stay, and patient satisfaction. No study has demonstrated that internal medicine residents contribute to excess patient morbidity or mortality. However, the published studies in this area are for the most part retrospective and were conducted 10 to 15 years ago. The full extent of the untoward (or the beneficial) effects of internal medicine residency training on patients' outcomes is unknown. CONCLUSIONS: Multisite, prospective studies would remedy the deficiencies in the published research in this area and would yield the most valid insight into the range and extent of the effects of housestaff training on patients' outcomes. In the absence of such studies and in a rapidly changing managed care environment, academic medical centers and departments of medicine need to be aware of those aspects of the clinical education of residents that are most likely to affect patients' outcomes.

Competition, professional synergism, and the geographic distribution of rural physicians.

This study provides a theoretical and empirical investigation of competition and synergism among physicians in rural areas. The results show that rural primary care physicians cluster together rather than distribute themselves evenly. This suggests that public policy makers and rural communities must take an active role to ensure provider availability in all rural areas. There is less clustering among subspecialists. The results also reveal a disturbing negative relationship between young children and physician availability in rural areas. Finally, the results provide strong evidence that the relationship between rural physicians and hospitals is synergistic.

The effects of computer-assisted electrocardiographic interpretation on physicians' diagnostic decisions.

OBJECTIVE: To evaluate the effect of computer-assisted interpretation of electrocardiograms (ECGs) on diagnostic decision making by primary care physicians. DESIGN: Randomized controlled trial. SETTING: Primary care physicians' outpatient clinics in or near the Minneapolis/St. Paul metropolitan area. PARTICIPANTS: Forty family physicians and general internists who were members of either of two large consortia of clinics. INTERVENTION: Subjects evaluated ten clinical vignettes accompanied by ECGs and reported their diagnostic impressions. The vignettes were based on actual patient visits. Half of the subjects received ECGs with computer-generated reports, the other half received the same ECGs without reports. MAIN OUTCOME MEASURES: ECG reading time; agreement with the clinical diagnosis; agreement with the computer report; diagnostic confidence. RESULTS: The subjects receiving the reports were more likely to agree with the clinical diagnoses of the original cases, particularly for two vignettes in which the diagnoses were uncommon and were mentioned in the reports. The subjects receiving the reports were also more likely to make diagnoses that were consistent with the reports, even when the reports were erroneous. Those receiving the reports spent, on average, 15 seconds less time looking at each ECG, a 25% decrease. CONCLUSIONS: In simulated cases, primary care physicians appear to use computer interpretations of ECGs when available, as shown by enhanced diagnostic accuracy and modestly reduced time spent reading the tracings. However, erroneous reports may mislead physicians. Since the effects of computerized ECG interpretation do not appear to have been uniformly favorable in this mock-clinical setting, it will be important to evaluate the effects of this technology in actual practice.

An analysis of physician recruitment strategies in rural hospitals.

This article analyzes the importance and effectiveness of several physician recruitment strategies in 60 short-term general hospitals in rural Minnesota. The results suggest that rural hospitals should continue to attract physicians with quality facilities and services, increase efforts to facilitate group practice opportunities, and rely less on direct financial incentives.

Measuring the dimensions of physician work.

Medicare has adopted a physician fee schedule that places emphasis on measuring physicians' work. We assessed the construct validity of self-reported work scores for 11 selected medical services performed by 44 internists in two large group practices. These physicians' work scores correlated highly with their ratings of time, physical and mental effort, and stress required to produce the services. Eighty-five percent of the variance in total work scores could be explained by the dimensions of work. Time was the most important input, but mental effort also was important for internists. We also found that physicians may reduce the total work required to produce two services for a patient if they provided those services in one visit, rather than in separate visits. Savings occurred for service pairs in which the physician could reduce his or her own time. Our findings imply that the Medicare fee schedule pays internists mainly for the time and mental effort required to produce medical services. They also underscore the importance to physicians of saving time by providing two services during the same patient visit.

Association between rural hospitals' residencies and recruitment and retention of physicians.

PURPOSE: To analyze the association between rural hospitals' participation in residency training and their subsequent success in physician recruitment and retention. METHOD: The units of observation were 1,789 short-term, general hospitals that were located in nonmetropolitan U.S. countries, had medical staff information available, and did not close, open, or merge from 1985 through 1989. Multivariate analysis was done using ordinary least-squares estimation. The dependent variable was the change in the size of the medical staff at each hospital. Several characteristics of the hospitals and their counties were used as independent variables, the primary one being the number of housestaff at each hospital in 1985. RESULTS: The 66 rural hospitals that invested in housestaff were found to be more successful in physician recruitment and retention in subsequent years. On average, for every eight housestaff in 1985, each hospital gained approximately one additional physician on its medical staff from 1985 through 1989. CONCLUSION: The rural hospitals with residencies were more likely to be successful at recruiting and retaining physician staff than were the hospitals without residencies. Because most of the residencies were probably in primary care specialties, this finding is suggestive in light of the national need for primary care training as well as for successful recruiting strategies for rural hospitals.

Specialty differences in the 'July Phenomenon' for Twin Cities teaching hospitals.

This study evaluated changes over the academic year in the cost and the outcome of inpatient care to investigate the effect of housestaff experience in teaching hospitals. Patients with 25 preselected discharge diagnoses, admitted between January 1, 1983 and December 31, 1987 to acute-care, nonfederal, non-pediatric hospitals in the Minneapolis/St. Paul metropolitan area (total number available for analysis 240,467) were examined. Level of housestaff experience was measured as the number of days (1 to 365) into the academic year when the patient was admitted. Linear and logistic regression analyses were used to evaluate the different effects of experience on patient care in teaching hospitals compared with nonteaching hospitals. For the subset of patients with internal medicine diagnoses, the expected "July Phenomenon" was observed, with significant relative declines in diagnostic and pharmaceutical charges in teaching hospitals over the academic year. In contrast, surgery patients showed an increase in length of stay and various charges over the academic year in teaching hospitals. There were no meaningful effects of housestaff experience on mortality, operative complications, or nursing home discharge. These results indicate that housestaff training is significantly related to the use of hospital resources for inpatients, but that the degree and direction of the effects differ by specialty. These findings may reflect important differences among training programs in the process of physician education and its effects on patient care.

Searching for answers. Using computers to find the literature you need for patient care.

The medical journal literature is extensive and contains information that can help physicians care for patients. Minnesota physicians are able to tap into a variety of resources to help them locate relevant articles. Literature searches may be run by librarians in a local hospital library, a larger health sciences library, or via various professional associations. Physicians interested in conducting their own searches are able to use local systems or dial into national ones. Innovations in computers will allow easier and faster access to the medical literature in the future.

Computer-assisted test interpretation: considerations in patient care.

Computer-assisted test interpretation (CATI) is a set of developing technologies designed to support medical decision-making. This paper develops a taxonomy of computer-assisted test interpretation, giving specific consideration to the characteristics of the data that are to be interpreted, the nature of the interpretive task, the expected involvement of the health professional in the generation of the interpretation, the inference mechanism used for the interpretation, and the broader context of the interpretation. We go on to examine potential benefits and disadvantages of CATI systems in terms of accuracy, information management, interpretation time, patient management, medical communication, and expense. Finally, we examine electrocardiogram interpretation systems from the perspective of this taxonomy, and offer suggestions regarding areas of further inquiry into the effects of CATI on medical care.

Economies of scope and payment for physician services.

Physician payment reform will base payment largely upon physician work. Current reforms assume that services are provided independently, yet physicians may often perform two or more services at one time. There is evidence from other industries that services provided jointly may not require the same total resources as identical services provided independently. This study evaluated whether physician-reported work and time were the same for some common services when provided jointly and when provided separately. Six case vignettes were constructed consisting of two services each. Forty-four general internists rated the total work and time required for each vignette performed as a whole, and for the two services performed separately. Total work was estimated using a magnitude estimation technique similar to that used in developing the resource-based relative value scale. For five of the six vignettes, the work rating for performing the services together was significantly less than the sum of the ratings for the separate services. The work savings associated with providing services together ranged from 4% to 30% of the total work of the separate services. A similar reduction was observed for the estimated time to perform services jointly in four of the six vignettes. In no case was work or time lower when services were provided separately. Physicians report lower work and time for at least some pairs of services, compared with providing the same services separately. Reimbursement mechanisms that fail to account for these reductions may provide incentives to combine or add services.

Call nights and patients care: effects on inpatients at one teaching hospital.

OBJECTIVE: To determine whether the timing and number of patients admitted by internal medicine housestaff under a traditional call schedule affect the resource utilization and outcome of care for those patients. DESIGN: Retrospective cohort study, using existing computerized records. SETTING: University-affiliated 340-bed city/county teaching hospital. PATIENTS/PARTICIPANTS: 22,112 patients discharged from the internal medicine service who had been admitted by an on-call first-year resident between January 1, 1980, and December 31, 1987. MEASUREMENTS AND MAIN RESULTS: Admission after 5:00 PM was associated with decreased hospital length of stay (8.1%, p less than 0.0001), but increased total charges (3.1%, p = 0.007). The relative risk of inpatient mortality for patients admitted at night was 1.21 (p = 0.03). Patients of busier housestaff, as indicated by a larger number of on-call admissions, had lower total charges (1.7% decreased per admission) and no change in risk of inpatient mortality. While no linear relation was found between number of admissions and length of stay, analysis of nonlinear effects revealed that length of stay first rises, then falls as interns receive more on-call admissions. CONCLUSIONS: The number and timing of admissions by on-call internal medicine housestaff are significantly related to length of hospital stay, total charges, and likelihood of inpatient mortality at one teaching hospital. These variations should be considered in planning the reform of residency training programs.

Two strategies for prophylaxis of fatal postoperative pulmonary embolism. Cost-effectiveness analysis.

While subcutaneous heparin is a standard prophylaxis for death from pulmonary embolism following general surgery, it has been suggested that adding the vasoconstricting drug dihydroergotamine would improve survival compared to heparin alone. Dihydroergotamine may be associated with rare but life-threatening side effects; thus, reduced mortality from pulmonary embolism could be offset by increased mortality from other causes. Because a clinical trial to examine this possibility would be impractical, we performed a cost-effectiveness analysis to evaluate the effects of prophylactic dihydroergotamine on mortality. Based on published data, despite its favorable effects on the prevention of deep vein thrombosis, the addition of dihydroergotamine did not appear to save lives when added to heparin as prophylaxis. Probabilistic sensitivity analysis demonstrated that even if published risk estimates are in error, substantial changes would still not support the conclusion that dihydroergotamine is life-saving. In the absence of clear potential for improved survival, the increased costs associated with dihydroergotamine provide reason to question its routine prophylactic use in general surgery.