Association between hospital and surgeon procedure volume and outcomes of total hip replacement in the United States medicare population.

BACKGROUND: The mortality and complication rates of many surgical procedures are inversely related to hospital procedure volume. The objective of this study was to determine whether the volumes of primary and revision total hip replacements performed at hospitals and by surgeons are associated with rates of mortality and complications. METHODS: We analyzed claims data of Medicare recipients who underwent elective primary total hip replacement (58,521 procedures) or revision total hip replacement (12,956 procedures) between July 1995 and June 1996. We assessed the relationship between surgeon and hospital procedure volume and mortality, dislocation, deep infection, and pulmonary embolus in the first ninety days postoperatively. Analyses were adjusted for age, gender, arthritis diagnosis, comorbid conditions, and income. Analyses of hospital volume were adjusted for surgeon volume, and analyses of surgeon volume were adjusted for hospital volume. RESULTS: Twelve percent of all primary total hip replacements and 49% of all revisions were performed in centers in which ten or fewer of these procedures were carried out in the Medicare population annually. In addition, 52% of the primary total hip replacements and 77% of the revisions were performed by surgeons who carried out ten or fewer of these procedures annually. Patients treated with primary total hip replacement in hospitals in which more than 100 of the procedures were performed per year had a lower risk of death than those treated with primary replacement in hospitals in which ten or fewer procedures were performed per year (mortality rate, 0.7% compared with 1.3%; adjusted odds ratio, 0.58; 95% confidence interval, 0.38, 0.89). Patients treated with primary total hip replacement by surgeons who performed more than fifty of those procedures in Medicare beneficiaries per year had a lower risk of dislocation than those who were treated by surgeons who performed five or fewer of the procedures per year (dislocation rate, 1.5% compared with 4.2%; adjusted odds ratio, 0.49; 95% confidence interval, 0.34, 0.69). Patients who had revision total hip replacement done by surgeons who performed more than ten such procedures per year had a lower rate of mortality than patients who were treated by surgeons who performed three or fewer of the procedures per year (mortality rate, 1.5% compared with 3.1%; adjusted odds ratio, 0.65; 95% confidence interval, 0.44, 0.96). CONCLUSIONS: Patients treated at hospitals and by surgeons with higher annual caseloads of primary and revision total hip replacement had lower rates of mortality and of selected complications. These analyses of Medicare claims are limited by a lack of key clinical information such as operative details and preoperative functional status.

The treating physician as active gatekeeper in the recruitment of research subjects.

BACKGROUND: Institutional Review Boards vary in regard to the conditions imposed on investigators concerning contacting potential subjects to participate in health-services research studies. OBJECTIVE: The impact of more active involvement of the treating physician was examined in the approval process for recruiting study subjects. DESIGN: In recruiting subjects for a Massachusetts-based, multihospital (n = 17), health-services research study of treatment patterns for early stage breast cancer that required patient interviews, four hospitals stipulated that the treating surgeon provide written permission to the investigators to allow any contact with a potential study subject for the purpose of recruitment (active physician involvement group); the remaining 13 hospitals stipulated that the treating surgeon need only respond to the investigators if contact with a potential subject was forbidden (passive physician involvement group). SUBJECTS: Of the 1401 potential subjects treated for early stage breast cancer, 697 were in the active physician involvement group and 704 were in the passive physician involvement group. MEASURES: The percentages of patients for whom contact was allowed for recruitment purposes and who enrolled in the study were determined for the active physician involvement group and the passive physician involvement group, respectively. Logistic regression models were used to assess the independent effect of physician involvement on study enrollment. RESULTS: Of the 697 patients in the active physician involvement group, contact was approved by the treating surgeon for 72% (n = 505), compared with 91% (n = 638) of the passive physician involvement group (P <0.001). After adjustment for a variety of patient, physician, and hospital-level variables, patients in the passive physician involvement group were found to be significantly more likely to be enrolled in the study (adjusted OR 2.61; 95% CI, 1.53-4.45). However, among those patients approved for investigator contact, there were no significant differences between patients who were enrolled and patients who were not enrolled in the study with regard to physician involvement in the recruitment process (adjusted OR 1.13; 95% CI, 0.70-1.81). CONCLUSION: Our findings demonstrate that more stringent IRB requirements on health services researchers to verify permission from the treating physician to access patients for recruitment purposes adversely impact on the enrollment of patients even in noninterventional research studies. Current procedures for involving the treating physician as a gatekeeper in the recruitment of research subjects may limit access to patient participation in research studies from the perspectives of both researchers and potential subjects.

Pitfalls in assessing the quality of care for patients with cardiovascular disease.

PURPOSE: There are no clinical performance measures for cardiovascular diseases that span the continuum of hospital through postdischarge ambulatory care. We tested the feasibility of developing and implementing such measures for patients with acute myocardial infarction, congestive heart failure, or hypertension. SUBJECTS AND METHODS: After reviewing practice guidelines and the medical literature, we developed potential measures related to therapy, diagnostic evaluation, and communication. We tested the feasibility of implementing the selected measures for 518 patients with myocardial infarction, 396 with heart failure, and 601 with hypertension who were enrolled in four major U.S. managed care plans at six geographic sites, using data from administrative claims, medical records, and patient surveys. RESULTS: Difficulties in obtaining timely data and small numbers of cases adversely affected measurement. We encountered 6- to 12-month delays, disagreement between principal discharge diagnosis as coded in administrative and records data (for 9% of myocardial infarction and 21% of heart failure patients), missing medical records (20% for both myocardial infarction and heart failure patients), and problems in identifying physicians accountable for care. Low rates of performing key diagnostic tests (e.g., ejection fraction) excluded many cases from measures of appropriate therapy that were conditional on test results. Patient survey response rates were low. CONCLUSIONS: Constructing meaningful clinical performance measures is straightforward, but implementing them on a large scale will require improved data systems. Lack of standardized data captured at the point of clinical care and low rates of eligibility for key measures hamper measurement of quality of care.

The development of a decisional balance measure of physician smoking cessation interventions.

BACKGROUND: Decreasing the prevalence of smoking is an important health care goal, and there is evidence that physicians' advice to quit is an important motivator for patients. However, fewer than half of smokers report that they have ever been advised to quit. This study was conducted to develop a decisional balance measure for physician delivery of smoking cessation interventions. METHODS: This study included a convenience sample of 155 primary care physicians. A decisional balance measure was developed using item generation and development, pilot testing, and principal components analyses. Validity was established by relating the decisional balance measure to a previously validated item of counseling behavior and to physician stage of readiness to deliver smoking cessation counseling. RESULTS: Based on principal components analyses and item analyses, the final measure consisted of 10 Pro and 10 Con items with coefficient alpha of 0.83 and 0.86. The Pros and Cons scales were significantly associated with self-reported counseling to patients who smoke and to stage of readiness to deliver smoking cessation counseling. CONCLUSIONS: A decisional balance measure of physician smoking cessation interventions can be used to assist investigators in developing effective interventions to enhance the delivery of smoking cessation interventions in primary care settings.

Identifying a cohort of patients with early-stage breast cancer: a comparison of hospital discharge and primary data.

BACKGROUND: Hospital discharge data are a potential source of information for quality of care; however, they lack detailed clinical data. OBJECTIVES: To assess the usefulness of hospital discharge data for describing patterns of care. RESEARCH DESIGN: Cohort study comparing hospital discharge data with data collected from medical records and patients. PATIENTS: Women diagnosed with early-stage breast cancer in Massachusetts and Minnesota (1993-1995). MEASURES: The percentage of patients in the primary data set who did not match a record in the discharge data set, and the percentage of patients in the discharge data set who did not match a record in the primary data set. Odds ratios for appearing in one data set, but not the other according to patient and hospital characteristics. RESULTS: For patients in the primary data set, 26.9% from Massachusetts and 13.2% from Minnesota did not match a record in the discharge data set. In both states, factors associated with failure to match to the discharge data included receipt of breast conserving surgery, shorter length of stay, and treatment hospital. For patients in the discharge data set, 43.4% in Massachusetts and 30.3% in Minnesota did not match a patient in the primary data set. In both states, factors associated with failure to match to the primary data included treatment hospital and the presence of positive lymph nodes. CONCLUSIONS: Hospital discharge data were fairly sensitive when linked to patients with early-stage breast cancer who were identified through hospital records. The discharge data lacked specificity, however. If discharge data are used to characterize patterns care for inpatients with early stage disease, estimates are likely to be inaccurate due to the inclusion of unsuitable patients in the denominator used to calculate procedure rates.

Discussion of treatment options for early-stage breast cancer: effect of provider specialty on type of surgery and satisfaction.

OBJECTIVES: To describe the physicians with whom breast cancer patients discuss treatment options and assess whether discussing surgical options with a medical oncologist is associated with type of surgery and satisfaction. RESEARCH DESIGN: Medical record abstraction and survey. SUBJECTS: Women with early-stage breast cancer numbering 2,426 in two states-Massachusetts, where the rate of breast-conserving surgery is high, and Minnesota, where it is lower. MEASURES: Receipt of breast-conserving surgery and satisfaction. RESULTS: Women in Massachusetts discussed breast cancer treatments with more physicians than women in Minnesota (mean 3.5 vs. 2.8; P <0.001) and more often discussed surgical options with a medical oncologist (52% vs. 28%; P <0.001). Using propensity score analyses, in Massachusetts, discussing surgical options with a medical oncologist was not related to type of surgery (adjusted difference in rate of breast-conserving surgery: 3.9%, 95% CI -3.6% to 11.5%) but was associated with greater satisfaction (adjusted difference: 8.1, 95% CI 2.0% to 14.2%). In Minnesota, discussing surgical options with a medical oncologist was associated with breast-conserving surgery (adjusted difference: 12.6%, 95% CI 5.6% to 19.7%) with no difference in satisfaction (adjusted difference: -1.5%, 95% CI -6.8% to 3.8%). CONCLUSIONS: Outcomes associated with discussing surgical treatments with a medical oncologist vary with local care patterns. Where breast-conserving surgery is standard care, seeing a medical oncologist is not related to type of surgery, but is associated with greater satisfaction. Where it is not the standard, seeing a medical oncologist is associated with more breast-conserving surgery and equivalent satisfaction. These findings suggest that collaborative care may benefit women with respect to treatment selection or satisfaction.

Impact of underuse, overuse, and discretionary use on geographic variation in the use of coronary angiography after acute myocardial infarction.

BACKGROUND: Geographic variation in the use of medical procedures has been well documented. However, it is not known whether this variation is due to differences in use when procedures are indicated, discretionary, or contraindicated. OBJECTIVES: To examine whether use of coronary angiography after acute myocardial infarction (AMI) according to appropriateness criteria varied across geographic regions and whether underuse, overuse, or discretionary use accounted for variation in overall use. DESIGN: Retrospective cohort study using data from the Cooperative Cardiovascular Project. SETTING: Ninety-five hospital referral regions. PATIENTS: There were 44,294 Medicare patients hospitalized with AMI during 1994 or 1995, classified according to appropriateness for angiography. MAIN OUTCOME MEASURE: Variation in use of angiography, as measured by the difference between high and low rates of use across regions. RESULTS: Across regions, variation in the use of angiography was similar for indications judged necessary; appropriate, but not necessary; or uncertain. Variation was lowest for indications judged unsuitable (difference between high rate and low rate across regions = 16.3%; 95% CI = 12.6%; 20.6%). The primary cause of variation in the overall rate of angiography was due to use for indications judged appropriate, but not necessary or uncertain. When variation associated with these indications was accounted for, the difference between the resulting high and low overall rates was 10.8% (9.4%, 12.4%). In contrast, variation in the overall rate remained high when underuse in necessary situations or overuse in unsuitable situations was accounted for. CONCLUSIONS: Across regions, practice was more similar for patients categorized unsuitable for angiography than for patients with other indications. Variation in overall use of angiography appeared to be driven by utilization for discretionary indications rather than by underuse or overuse. If equivalent rates across geographic areas are judged desirable, then greater effort must be directed toward defining care for patients with discretionary indications.

Validating recommendations for coronary angiography following acute myocardial infarction in the elderly: a matched analysis using propensity scores.

We determined whether adherence to recommendations for coronary angiography more than 12 h after symptom onset but prior to hospital discharge after acute myocardial infarction (AMI) resulted in better survival. Using propensity scores, we created a matched retrospective sample of 19,568 Medicare patients hospitalized with AMI during 1994-1995 in the United States. Twenty-nine percent, 36%, and 34% of patients were judged necessary, appropriate, or uncertain, respectively, for angiography while 60% of those judged necessary received the procedure during the hospitalization. The 3-year survival benefit was largest for patients rated necessary [mean survival difference (95% CI): 17.6% (15.1, 20.1)] and smallest for those rated uncertain [8.8% (6.8, 10.7)]. Angiography recommendations appear to select patients who are likely to benefit from the procedure and the consequent interventions. Because of the magnitude of the benefit and of the number of patients involved, steps should be taken to replicate these findings.

Appropriateness of coronary angiography after myocardial infarction among Medicare beneficiaries. Managed care versus fee for service.

BACKGROUND: Previous studies have documented that cardiac procedures are performed less frequently in patients enrolled in managed-care plans than in those with fee-for-service coverage. However, it is not known whether this difference is due to less frequent use of cardiac procedures when they are indicated or to less frequent use when they are not indicated. METHODS: We compared the use of coronary angiography after acute myocardial infarction among Medicare beneficiaries who had traditional fee-for-service coverage with the use among Medicare beneficiaries enrolled in managed-care plans. The analysis was adjusted for differences in demographic and clinical characteristics of the patients and for characteristics of the hospitals to which they were admitted. We studied more than 50,000 beneficiaries in seven states and evaluated their care according to guidelines proposed by the American College of Cardiology and the American Heart Association (ACC-AHA). RESULTS: Among the 44 percent of patients in both groups who had ACC-AHA class I indications (those for which angiography is useful and effective), more fee-for-service beneficiaries than managed-care enrollees underwent angiography (46 percent vs. 37 percent, P<0.001). The rate of angiography was very low among patients with class I indications who were admitted to hospitals without angiography facilities (31 percent in the fee-for-service group and 15 percent in the managed-care group, P<0.001). Among patients with class III indications (those for which angiography is not effective), the rate of use was low in both groups (approximately 13 percent). CONCLUSIONS: In situations in which angiography is thought to be useful, it is used less often among Medicare beneficiaries enrolled in managed-care plans than among those with fee-for-service coverage. Moreover, rates of use among patients with class I indications are fairly low in both groups, suggesting that there is room for improving the care of elderly patients with myocardial infarction, especially those admitted to hospitals without angiography facilities.

The effect of less than definitive care on breast carcinoma recurrence and mortality.

BACKGROUND: Risk factors for breast carcinoma offer few opportunities for prevention; thus, the reduction of morbidity and mortality among breast carcinoma patients must remain a priority. The objective of this study was to measure the effects of less than definitive care for patients with breast carcinoma on disease recurrence and mortality. METHODS: The prognostic evaluation and treatment received by an inception cohort of 494 women was characterized. Three hundred ninety women ages 45-90 years with local or regional breast carcinoma who were diagnosed between 1984 and 1986 and were treated at one of eight Rhode Island hospitals comprised the final cohort. Disease recurrence and mortality were ascertained through December 31, 1996. Candidate determinants of outcomes were a less than definitive prognostic evaluation and less than definitive primary therapy-adjusted for confounding by patient age, extent of disease, and comorbid diseases. RESULTS: During the first 5 years of follow-up, patients who received a less than definitive prognostic evaluation had an adjusted relative hazard of recurrence of 1.7 (95% confidence interval, 1.0-2.7) and an adjusted relative hazard for breast carcinoma mortality of 2.2 (95% confidence interval, 1.2-3.9). Patients who received less than definitive therapy had an adjusted relative hazard of recurrence of 1.6 (95% confidence interval, 1.0-2.5), and an adjusted relative hazard of breast carcinoma mortality of 1.7 (95% confidence interval, 1.0-2.8). CONCLUSIONS: Breast carcinoma patients who receive less than definitive care are at excess risk for disease recurrence and mortality. Women with early stage breast carcinoma should be treated in accordance with existing guidelines.

Patterns of breast carcinoma treatment in older women: patient preference and clinical and physical influences.

BACKGROUND: Older women have high rates of breast carcinoma, and there are substantial variations in the patterns of care for this population group. METHODS: The authors studied 718 breast carcinoma patients age 67 years and older who were diagnosed with localized disease between 1995 and 1997 from 29 hospitals in 5 regions. Data were collected from patients, charts, and surgeons. Logistic regression analysis was used to evaluate determinants of treatment. RESULTS: Women who were concerned about body image were 1.8 times more likely (95% confidence interval [95% CI], 1.1-2.8) to receive breast conservation surgery and radiotherapy than women without this preference, controlling for other factors. In contrast, women who preferred receiving no therapy beyond surgery were 3.9 times more likely (95% CI, 2.9-6.1) to undergo mastectomy than other women, after considering other factors. Radiotherapy was omitted after breast conservation 3.4 times more often (95% CI, 2.0-5.6) among women age 80 years and older than among women ages 67-79 years, controlling for covariates. Black women tended to have radiotherapy omitted after breast conservation surgery 2.0 times more often (95% CI, 0.9-4.4) than white women (P = 0.09). Women age 80 years and older also were 70% less likely (odds ratio = 0.3; 95% CI, 0.1-0.8) to receive chemotherapy than women ages 67-79 years, controlling for health, functional status, and other covariates. CONCLUSIONS: After considering other factors, patient preferences and age were found to be associated with breast carcinoma treatment patterns in older women. Further research and training are needed to provide care for the growing population of older women that is both clinically appropriate and consonant with a woman's preferences.

Improving discussion of surgical treatment options for patients with breast cancer: local medical opinion leaders versus audit and performance feedback.

We studied whether a hospital intervention utilizing medical opinion leaders and performance feedback reduced the proportion of women who reported that surgeons did not discuss options prior to surgery for early stage breast cancer. Opinion leaders provided clinical education to their peers using a variety of strategies and were selected for their ability to influence their peers. Performance feedback involved distributing performance reports that contained data on the outcomes of interest as well as on other treatment patterns. Twenty-eight hospitals in Minnesota were randomized to the intervention or to a control group that received performance feedback only. The proportion of patients at intervention hospitals who said that their surgeon did not discuss options decreased significantly (p < 0.001) from 33% to 17%, but a similar decrease was observed among control hospitals. Using medical opinion leaders to intervene in hospitals appeared as effective as performance feedback.

Providing consumers with information about the quality of health plans: the Consumer Assessment of Health Plans demonstration in Washington State.

BACKGROUND: In 1995 the Agency for Health Care Policy and Research began a five-year project, Consumer Assessment of Health Plans (CAHPS), to create instruments to collect data from consumers about their health care experiences, to develop sophisticated methods to convey these data to consumers, and to evaluate the value of these data to consumers who are selecting health plans. Results were obtained from one of the first CAHPS demonstration sites, the Washington State Health Care Authority. METHODS: The survey was distributed in May-June 1997 to 15,885 enrollees in 20 health plans; 8,204 (51.6%) surveys were completed. Survey results were summarized in a report that described the performance of plans, which was distributed to 97,000 enrollees, and reactions to the report were obtained from more than 1,500 individuals. RESULTS: Nearly everyone who was mailed the report said they saw it. A large proportion said they read most or all of it, and most thought the report was easy to understand, contained information needed to rate plans, and was helpful to learning about differences between plans. Those who used the CAHPS performance report were more likely to switch plans and to report that they were confident they had selected the best plan for their situation. DISCUSSION: The study was unique in that it attempted to evaluate whether employees read the performance report, how they reacted to it, and whether reading it influenced their decision to switch plans or their confidence that they had selected a suitable plan. Choosing a new plan probably stimulated more intense scrutiny of the report than not anticipating switching.

The public's willingness to discuss their preference for organ donation with family members.

We sought to assess the public's willingness to discuss their preference for organ donation with family members and to identify factors associated with willingness to discuss donation. We categorized individuals (N = 4365) with a preference for donation according to their willingness to discuss donation and used ordinal logistic regression analysis to identify factors related to their level of willingness. About half of those who want to donate have discussed this with a family member. Others were at various stages with respect to their commitment to discuss donation. Those in the more committed stages were more likely than others to have signed an organ donor card, to have seen information about organ donation, to be male, to be white or Hispanic, to know about donation issues, and to be comfortable with the idea of their own death. The decision to donate is ultimately made by family members of a suitable candidate for donation, yet nearly half of those who wish to donate have not made their wishes known. Interventions targeted to individuals at different stages of commitment are needed so that more family members can respond in accordance with their loved one's wishes.

Use of alternative medicine by women with early-stage breast cancer.

BACKGROUND: We analyzed the use of alternative medicine by women who had received standard therapy for early-stage breast cancer diagnosed between September 1993 and September 1995. METHODS: A cohort of 480 patients with newly diagnosed early-stage breast cancer was recruited from a Massachusetts statewide cohort of women participating in a study of how women choose treatment for cancer. Alternative medical treatments, conventional therapies, and health-related quality of life were examined. RESULTS: New use of alternative medicine after surgery for breast cancer was common (reported by 28.1 percent of the women); such use was not associated with choices about standard medical therapies after we controlled for clinical and sociodemographic variables. A total of 10.6 percent of the women had used alternative medicine before they were given a diagnosis of breast cancer. Women who initiated the use of alternative medicine after surgery reported a worse quality of life than women who never used alternative medicine. Mental health scores were similar at base line among women who decided to use alternative medicine and those who did not, but three months after surgery the use of alternative medicine was independently associated with depression, fear of recurrence of cancer, lower scores for mental health and sexual satisfaction, and more physical symptoms as well as symptoms of greater intensity. All groups of women reported improving quality of life one year after surgery. CONCLUSIONS: Among women with newly diagnosed early-stage breast cancer who had been treated with standard therapies, new use of alternative medicine was a marker of greater psychosocial distress and worse quality of life.

Correlates of support for organ donation among three ethnic groups.

Telephone interviews about organ donation were conducted with 4880 white respondents, 634 African-American respondents and 566 Hispanic respondents. Forty-three percent (42.9%) of whites, 31.2% of Hispanics and 22.6% of African-Americans reported that they were willing to donate their organs after their death (p < 0.001). Logistic regression analysis revealed three significant correlates of willingness to donate across all ethnic groups: having had a family discussion about end-of-life issues; the belief that a doctor does all he or she can to save a life before pursuing donation; and concerns about surgical 'disfigurement' of a relative's body after donation. Concerns in relation to body disfigurement were more prevalent among African-American and Hispanic respondents (p < 0.001) than among white respondents. Public education should: a) stress the need for family communication about end-of-life issues including organ donation; b) underline the fact that donation is considered only after all efforts to save the life of the patient are exhausted; and c) reassure minorities that the body of the donor is treated respectfully and not disfigured.

The influence of race on approaching families for organ donation and their decision to donate.

OBJECTIVES: This study examined whether patients' race was associated with their families' being approached for organ donation and agreeing to donation. METHODS: Logistic regression models were applied to data collected from records at 112 hospitals. RESULTS: The odds that a family of a White patient was approached for donation were nearly twice those for a family of an African American. The odds of donation also differed by race, but the magnitude varied by patient and hospital characteristics. CONCLUSIONS: Much attention directed toward racial disparity in donation has focused on attitudes of the public. The behavior of hospital staff also may be related to differences in rates.

The impact of cardiac comorbidity after carotid endarterectomy.

PURPOSE: Myocardial infarction and other comorbidities contribute to complications after carotid endarterectomy (CEA). However, because the combined stroke and death rate after CEA is less than 5%, even relatively large series have small numbers of adverse events that preclude a detailed analysis of the association between the outcome and the patient factors, such as comorbidity and age. We sought to overcome this limitation by studying patients who underwent CEA in a large random sample of Medicare beneficiaries. METHODS: We used a database that contained a 20% random sample of all Medicare beneficiaries to identify patients who underwent CEA between the years 1988 to 1990 (n = 22,165), and we followed these cases until 1992. With multivariate logistic regression and Cox proportional hazards regression models, we examined the impact of age, race, gender, geographic location, hospital characteristics, and comorbidity, including acute myocardial infarction (AMI) and congestive heart failure (CHF), on the risk of stroke and death after CEA. RESULTS: AMI and CHF had the greatest negative impact on the long-term survival rates (adjusted hazard ratio [HR]: 2.40, P < .0001, and 2.85, P < .0001, respectively). Other variables with a significant impact on the long-term survival rates were an age of >80 years (HR, 2.16; P < .0001), an acute stroke (HR, 1.51; P < .0001), diabetes mellitus (DM; HR, 1.52; P < .0001), and male sex (HR, 1.32; P < .0001). In addition, AMI, CHF, DM, and advanced age were associated with an increased risk of perioperative stroke and death. CONCLUSION: Patients with AMI, CHF, DM, and an age of >80 years have diminished perioperative and long-term survival rates after CEA. These results may alter the risk/benefit analysis for such patients, especially those with asymptomatic disease.

Consultation between cardiologists and generalists in the management of acute myocardial infarction: implications for quality of care.

BACKGROUND: The rapid expansion of managed care in the United States has increased debate regarding the appropriate mix of generalist and specialist involvement in medical care. OBJECTIVE: To compare the quality of medical care when generalists and cardiologists work separately or together in the management of patients with acute myocardial infarction (AMI). METHODS: We reviewed the charts of 1716 patients with AMI treated at 22 Minnesota hospitals between 1992 and 1993. Patients eligible for thrombolytic aspirin, beta-blockers, and lidocaine therapy were identified using criteria from the 1991 American College of Cardiology guidelines for the management of AMI. We compared the use of these drugs among eligible patients whose attending physician was a generalist with no cardiologist input, a generalist with a cardiologist consultation, and a cardiologist alone. RESULTS: Patients cared for by a cardiologist alone were younger, presented earlier to the hospital, were more likely to be male, had less severe comorbidity, and were more likely to have an ST elevation of 1 mm or more than generalists' patients. Controlling for these differences, there was no variation in the use of effective agents between patients cared for by a cardiologist attending physician and a generalist with a consultation by a cardiologist. However, there was a consistent trend toward increased use of aspirin, thrombolytics, and beta-blockers in these patients compared with those with a generalist attending physician only (P<.05 for beta-blockers only). Differences between groups in the use of lidocaine were not statistically significant. The adjusted probabilities of use of thrombolytics for consultative care and cardiologist attending physicians were 0.73 for both. Corresponding probabilities were 0.86 and 0.85 for aspirin and 0.59 and 0.57 for beta-blockers, respectively. CONCLUSIONS: For patients with AMI, consultation between generalists and specialists may improve the quality of care. Recent policy debates that have focused solely on access to specialists have ignored the important issue of coordination of care between generalist and specialist physicians. In hospitals where cardiology services are available, generalists may be caring for patients with AMI who are older and more frail. Future research and policy analyses should examine whether this pattern of selective referral is true for other medical conditions.

Patient participation in decision-making.

We review the research both for and against patient participation in decision-making and conclude that (a) patients want to be informed of treatment alternatives, (b) they, in general, want to be involved in treatment decisions when more than one treatment alternative exists, and (c) the benefits of participation have not yet been clearly demonstrated in research studies. However, studies that have addressed the latter issue suffer from methodological problems such as small sample sizes and lack of control for potential confounding variables. We conclude that patient participation in decision-making is justified on humane grounds alone and that physicians should endeavor to engage patients in decision-making, albeit at varying degrees, when more than one effective treatment option exists. We propose that methods be developed to evaluate a patient's level of "readiness" to participate in decision-making and that interventions that match the patient's level of readiness be applied to increase participation.