Effect of physician specialty on use of necessary coronary angiography

Cardiac testing choices by physician specialty in the CMR-IMPACT trial

BACKGROUND

Heterogeneity is observed in the care of patients with chest pain. We investigate the association of physician specialty and diagnostic testing among patients admitted for suspected acute coronary syndrome (ACS).

METHODS

This is a secondary analysis of the CMR-IMPACT multicenter randomized controlled trial in which patients with suspected ACS were admitted and randomized to undergo invasive angiography or non-invasive CMR stress imaging. Admitting physician was dichotomized to interventional cardiologist (IC) or not (e.g. hospitalist). We describe adherence to protocol and angiography during the index visit by treatment arm and admitting physician specialty. A generalized estimating equation accounting for clustering within physician was used to evaluate significance and adjusted for randomization arm.

RESULTS

The 258 enrolled patients from 2013 to 2018 had a mean age of 60.7 (SD ± 10.9) years, 40.3 % (104/258 were female), and 64.7 % (167/258) were white race. ICs were the admitting physicians for 50.4 % (130/258) of the patients. Index angiography was performed more often among patients admitted by IC versus other physicians, 65.4 % (85/130) versus 53.1 % (68/128), respectively; aOR 1.75 (95 % CI 1.14-2.68). Among patients randomized to an invasive strategy, higher protocol adherence was observed in those admitted by IC [85.3 % (58/68)] versus other physicians [64.5 % (40/62)]; OR 2.82 (95 % CI 1.08-7.38). For patients randomized to the CMR-based strategy, adherence to protocol was similar for IC [67.7 % (42/62)] and other physicians [66.7 % (44/66)]; OR 0.82 (95 % CI 0.35-1.94).

CONCLUSION

Invasive angiography was more frequent among patients admitted by interventional cardiologists compared to other physicians.

Comparison of the use of downstream tests after exercise treadmill testing by cardiologists versus noncardiologists

Although exercise treadmill testing (ETT) is a useful initial test for patients with suspected cardiovascular (CV) disease, there is concern regarding the use of downstream imaging tests especially in the setting of equivocal or positive ETTs. Patients with no history of coronary artery disease who underwent ETT between 2009 and 2010 were prospectively included. Referring physicians were categorized as cardiologists and noncardiologists. Downstream tests included nuclear perfusion imaging, coronary computed tomography angiography, stress echocardiography, stress magnetic resonance, and invasive coronary angiography performed up to 6 months after the ETT. Patients were followed for CV death, myocardial infarction, and coronary revascularization for a median of 2.7 years. Among 3,656 patients, the ETT were negative in 2,876 (79%), positive in 132 (3.6%), and inconclusive in 643 (18%). Cardiologists ordered less downstream tests than noncardiologists (9.5% vs 12.2%, p=0.02), with less noninvasive tests (5.9% vs 10.4%, p<0.0001) and more invasive angiography (3.6% vs 1.8%, p<0.0001). After adjustment for confounding, patients evaluated by cardiologists were less likely to undergo additional testing after equivocal (odds ratio: 0.65, p=0.02) or positive ETT results (odds ratio: 0.39, p=0.02), whereas after negative ETT, the odds ratio was 1.7 (p=0.06). There was no difference in the rate of adverse CV events between patients referred by cardiologists versus noncardiologists. In conclusion, patients referred for ETT by cardiologists are less likely to undergo additional testing, particularly noninvasive tests, than those referred by noncardiologists. The lower rate of tests is driven by a lower rate of tests after positive or inconclusive ETT.

Use of functional tests before angiography in patients with normal coronary arteries

BACKGROUND

Functional tests provide diagnostic and prognostic information in patients with suspected coronary disease and are recommended in investigating and guiding management of these patients. There is little data on their utilization, especially in patients with low to intermediate pre-test probability of disease.

METHODS

From 6053 consecutive patients who underwent 6830 coronary angiograms for suspected coronary disease, 758 patients were subsequently found to have normal coronary arteries. Clinical data, functional tests performed prior to angiography and referring physicians were analyzed.

RESULTS

The 758 patients had mean pre-test probability of disease of 42+/-30%. Only 483 patients had undergone functional tests before angiography. There were no differences in gender, age, and pre-test probability between patients who underwent functional tests and those who did not. Three hundred thirteen patients underwent angiography as inpatients while 445 were day-only patients. Inpatients were less likely to have undergone functional tests prior to angiography. Inpatient status was the only independent predictor of not undergoing functional tests (OR 5.9, p<0.001). Functional tests revealed inducible ischaemia in only 241 of the 483 patients. Patients referred by cardiologists were more likely to have undergone functional tests compared with those referred by other physicians. Procedural cardiologists and non-procedural cardiologists had similar rate of use of functional tests.

CONCLUSIONS

In our patients with normal coronary arteries, utilization of functional tests was low, particularly for inpatients. A significant proportion proceeded to angiography despite negative functional tests. Referrer characteristics and inpatient status, rather than pre-test probability, appeared to have greater impact on utilization of functional tests.

Prescription and choice of diagnostic imaging by physician specialty in Alzheimer's Centers (Unità di Valutazione Alzheimer - UVA) in Northern Italy

BACKGROUND AND AIMS

Physician's specialty has been shown to have an effect on health outcomes and financial expenditure in a number of conditions. This is particularly true in the differential diagnosis of cognitive deterioration, in which technological procedures are needed. The aim of this study is to assess the effect of physician specialty on the prescription of diagnostic imaging (CT and MR) in patients with cognitive impairment, referred to Alzheimer Evaluation Units (Unità di Valutazione Alzheimer) in Northern Italy.

METHODS

An ad-hoc questionnaire was sent to UVA referents in northern Italy (Lombardy, Piedmont, Trentino, Emilia-Romagna and Veneto), requesting information on the frequency of prescriptions for CT and MR and reasons for the choice, on a 0 to 7 scale.

RESULTS

The physician-in-charge was a neurologist in 22 and a geriatrician in 22 Alzheimer's centers. Intensive use of CT was similar in neurologists and geriatricians (64 vs 68%), whereas intensive use of MR was more frequent in neurologists (41 vs 10%; p = 0.03). Overall, organizational factors (availability of the scanner on-site and waiting list for imaging, mean weight = 1.6 +/- 1.4) were as important as patient-related factors (age, severity of cognitive impairment, and clinical suspicion of cerebrovascular disease, mean weight 1.7 +/- 1.4; p = 0.84). Sixty-five percent of neurologists based their choices between CT and MR on patient-related and 35% on organizational factors, whereas the opposite proportion was found for geriatricians (29 vs 71%, p = 0.04).

CONCLUSIONS

The high weight of organizational factors on the prescription of diagnostic imaging is not consistent with an evidence-based diagnostic system.

Somatic, posttraumatic stress, and depressive symptoms among injured patients treated in trauma surgery

Few investigations have examined the course of somatic complaints among acutely injured trauma survivors. Posttraumatic stress disorder (PTSD), depressive, and somatic symptoms were assessed in trauma surgery inpatients (N=73) interviewed while hospitalized and again 12 months after their injury. Somatic symptoms occurred frequently and were significantly greater in patients with higher levels of PTSD and depressive symptoms, even after the analyses were adjusted for injury severity and medical comorbidity. These findings, when considered in conjunction with data documenting the heterogeneity of treatment providers visited after traumatic injury, suggest that the development of early screening and intervention procedures should incorporate assessments of physical symptoms.

Understanding individual and small area variation in the underuse of coronary angiography following acute myocardial infarction

BACKGROUND

Underuse of coronary angiography is common among patients with acute myocardial infarction (AMI) and the magnitude of underuse varies across geographic areas.

OBJECTIVES

To examine the influence of patient demographic, clinical and hospital characteristics on underuse of coronary angiography, and the contribution of these factors to variation in underuse across geographic regions.

RESEARCH DESIGN

Cohort study using data from the Cooperative Cardiovascular Project.

SUBJECTS

Nine thousand four hundred fifty-eight patients in 95 hospital referral regions (HRRs) hospitalized for AMI in 1994 to 1995 and for whom angiography was rated necessary.

MEASURES

Odds ratios (95% confidence intervals) associated with underuse of angiography according to patient and hospital characteristics. The difference between low and high rates of underuse of angiography across regions after controlling for regional differences in patient and hospital characteristics.

RESULTS

Of those for whom angiography was rated necessary, 42% did not undergo the procedure. Underuse of angiography was associated with several patient demographic and hospital attributes (eg, female gender, black race, treatment in a hospital without angiography, treatment by a general practitioner) as well as with prevalent clinical characteristics, such as renal insufficiency, congestive heart failure, prior coronary artery bypass surgery, and chronic obstructive pulmonary disease. Across HRRs, variation in underuse ranged from 24.0% to 58.3%. The difference between low and high rates did not decline significantly after controlling for regional differences in patient or hospital characteristics.

CONCLUSIONS

At the patient-level, rates of necessary angiography may be improved if we address disparities in care related to sociodemographic characteristics and to the technological capabilities of hospitals. In addition, practice guidelines should be updated to reflect clinical concerns about the risks and benefits of angiography and subsequent revascularization in certain patient sub-groups, both to provide appropriate guidance to physicians and to facilitate better estimates of underuse. The causes of regional variation in underuse do not appear to be related to regional differences in patient or hospital characteristics, and therefore, require further study.

Sensitivity and specificity of the RAND/UCLA Appropriateness Method to identify the overuse and underuse of coronary revascularization and hysterectomy

There is no empirical evidence on the sensitivity and specificity of methods to identify the possible overuse and underuse of medical procedures. To estimate the sensitivity and specificity of the RAND/UCLA Appropriateness Method. Parallel three-way replication of the RAND/UCLA Appropriateness Method for each of two procedures, coronary revascularization and hysterectomy. Maximum likelihood estimates of the sensitivity and specificity of the method for each procedure. These values were then used to re-calculate past estimates of overuse and underuse, correcting for the error rate in the appropriateness method. The sensitivity of detecting overuse of coronary revascularization was 68% (95% confidence interval 60-76%) and the specificity was 99% (98-100%). The corresponding values for hysterectomy were 89% (85-94%) and 86% (83-89%). The sensitivity and specificity of detecting the underuse of coronary revascularization were 94% (92-95%) and 97% (96-98%), respectively. Past applications of the appropriateness method have overestimated the prevalence of the overuse of hysterectomy, underestimated the prevalence of the overuse of the coronary revascularization, and provided true estimates of the underuse of revascularization. The sensitivity and specificity of the RAND/UCLA Appropriateness Method vary according to the procedure assessed and appear to estimate the underuse of procedures more accurately than their overuse.

Poor long-term survival after coronary angiography in patients with renal insufficiency

Cardiovascular disease is common among dialysis patients, but much less is known regarding non-dialysis-dependent renal insufficiency (NDDRI) and its association with cardiac disease. We undertook a study to assess the impact of renal insufficiency on survival post-coronary angiography by comparing three groups of patients: dialysis-dependent patients, patients with NDDRI (creatinine > 2.3 mg/dL), and a reference group with creatinine levels less than 2.3 mg/dL and not on dialysis therapy. We used a prospective cohort that consisted of all patients undergoing coronary angiography in Alberta, Canada, from January 1, 1995, to December 31, 1997. Of the 16,989 patients, 196 patients (1.2%) were on dialysis therapy, 262 patients (1.5%) had NDDRI, and 16,531 patients (97.3%) formed the reference group. Mortality rates 1 year after angiography were 30.2% for patients with NDDRI, 15.8% for dialysis patients, and 4.1% for the reference group. Compared with the reference group, crude 4-year survival was significantly worse for dialysis patients and those with NDDRI, with hazard ratios of 4.05 (95% confidence interval, 3.02 to 5.42) and 7.32 (95% confidence interval, 5.97 to 8.97), respectively. Even after adjusting for clinical risk factors, survival remained worse for dialysis patients and those with NDDRI, with hazard ratios of 2.59 (95% confidence interval, 1.92 to 3.49) and 2.51 (95% confidence interval, 2.02 to 3.12), respectively. We conclude that renal insufficiency, both dialysis dependent and non-dialysis dependent, is an independent risk factor for increased mortality and poor long-term survival among patients undergoing coronary angiography.

A systematic review of the effects of physician specialty on the treatment of coronary disease and heart failure in the United States

PURPOSE

To assess the effects of physician specialty on the knowledge, management, and outcomes of patients with coronary disease or heart failure.

MATERIALS AND METHODS

We performed a systematic search of MEDLINE from 1980 to 1997, as well as bibliographic references to articles about the effects of physician specialty on the knowledge, treatment, and outcomes of patients with coronary disease or heart failure in the United States.

RESULTS

Twenty-four articles met our criteria for inclusion (including eight that involved knowledge or self-reported practices, 14 that described actual practice patterns, and six that measured clinical outcomes). Cardiologists were more knowledgeable than generalist physicians about the optimal evaluation and management of coronary disease but not about the use of angiotensin-converting enzyme (ACE) inhibitors for heart failure. Patients with unstable angina or myocardial infarction were more likely to receive proven medical therapies, and possibly had improved outcomes, if they were treated by cardiologists. The use of lipid-lowering drugs after myocardial infarction was also more common among patients of cardiologists. ACE inhibitor use for heart failure was probably greater, and short-term readmission rates were lower, with cardiology care.

CONCLUSIONS

Patients with coronary disease or heart failure in the United States who are treated by cardiologists appear more likely to receive evidence-based care and probably have better outcomes. Investigation of collaborative models of care and innovative efforts to improve the use of proven therapies by physicians are needed.

Self-reported differences between cardiologists and heart failure specialists in the management of chronic heart failure

BACKGROUND

Heart failure (HF) is responsible for considerable mortality morbidity rates and resource utilization. Recently, several studies have reported improved outcomes when patients are managed by special HF clinics, but it is uncertain whether this improvement reflects differences in physician practices or other aspects of the operation of these clinics.

OBJECTIVES

This study was designed to identify differences in HF management practices between general cardiologists and cardiologists specializing in the treatment of patients with HF.

METHODS

A survey examining diagnostic and treatment practices in patients with HF was sent to a sample of cardiologists derived from the American Medical Association Masterfile and to HF specialists who were members of the Society of Transplant Cardiologists or principal investigators in HF trials. Responses were examined in relation to guidelines issued by the Agency for Health care Policy and Research released 9 months previously.

RESULTS

In general both groups practice in conformity with published guidelines. However, there were important differences between the practice patterns of general cardiologists and HF specialists. For instance, in patients being evaluated for the first time, cardiologists reported using a chest radiograph to assist in the diagnosis more than did HF specialists (47% vs 12%), whereas HF specialists were more likely to use an echocardiogram (73% vs 48%). Both groups were likely to evaluate their patients for ischemia and possible revascularization, even in patients not having angina. However, HF specialists tended to use coronary angiography as the initial diagnostic test, whereas cardiologists were more likely to use stress testing. HF specialists more often used angiotensin-converting enzyme inhibitors as part of their initial therapy in patients with mild to moderate HF (94% vs 86%) and during maintenance therapy (91% vs 80%). Also, HF specialists were more likely than cardiologists to titrate angiotensin-converting enzyme inhibitors to higher doses (75% vs 35%), even in the presence of renal dysfunction.

CONCLUSION

Cardiologists and HF specialists generally manage their patients in conformity with guidelines. However, in many areas, such as angiotensin-converting enzyme inhibitor use, HF specialists do so more aggressively. These approaches may, in part, explain the success of the HF clinic model and raise the possibility that some portion of the HF population may be more optimally managed by cardiologists with a special interest in and additional training or experience with this condition.

Underuse and overuse of diagnostic testing for coronary artery disease in patients presenting with new-onset chest pain

PURPOSE

To determine the extent of overuse and underuse of diagnostic testing for coronary artery disease and whether the socioeconomic status, health insurance, gender, and race/ethnicity of a patient influences the use of diagnostic tests.

SUBJECTS AND METHODS

We identified patients who presented with new-onset chest pain not due to myocardial infarction at one of five Los Angeles-area hospital emergency departments between October 1994 and April 1996. Explicit criteria for diagnostic testing were developed using the RAND/University of California, Los Angeles, expert panel method. They were applied to data collected by medical record review and patient questionnaire.

RESULTS

Of the 356 patients, 181 met necessity criteria for diagnostic cardiac testing. Of these, 40 (22%) failed to receive necessary tests. Only 7 (3%) of the 215 patients who received some form of cardiac testing had tests that were judged to be inappropriate. Underuse was significantly more common in patients with only a high school education (30% vs 15% for those with some college, P = 0.02) and those without health insurance (34% vs 15% of insured patients, P = 0.01). In a multivariate logistic regression model, only the lack of a post-high school education was a significant predictor of underuse (odds ratio 2.2, 95% confidence interval 1.0 to 4.4).

CONCLUSION

Among patients with new-onset chest pain, underuse of diagnostic testing for coronary artery disease was much more common than overuse. Underuse was primarily associated with lower levels of patient education.

Access to coronary artery bypass surgery by race/ethnicity and gender among patients who are appropriate for surgery

OBJECTIVE

The study sought to determine if there were race/ethnicity or gender differences in access to coronary artery bypass graft (CABG) surgery among patients who have been designated as appropriate and as necessary for that surgery according to the RAND methodology.

METHODS

RAND appropriateness and necessity criteria were used to identify a race/gender stratified sample of postangiography patients who would benefit from coronary artery bypass graft surgery. These patients were tracked for 3 months to determine if they had undergone coronary artery bypass graft surgery in New York State. Subjects were a total of 1,261 postangiography patients in eight New York hospitals in 1994 to 1996. Measures included percentages of patients for whom coronary artery bypass graft surgery was appropriate and necessary undergoing surgery by race/ethnicity and gender, as well as multivariate odds ratios for race/ethnicity and gender.

RESULTS

After controlling for age, payer, number of vessels diseased, and presence of left main disease, African-American and Hispanic patients were found to be significantly less likely to undergo coronary artery bypass graft surgery than white non-Hispanic patients (respective odds ratios 0.64 and 0.60). When "necessity" was used as a criterion instead of "appropriateness," significant differences in access for African-American patients remained. The gatekeeper physician recommended surgery only 10% of the time that patients did not undergo "appropriate" coronary artery bypass graft surgery, and this percentage did not vary significantly by race/ethnicity or gender of the patient.

CONCLUSIONS

Even after controlling for appropriateness and necessity for coronary artery bypass graft surgery in a prospective study, African-American patients had significant access problems in obtaining coronary artery bypass graft surgery. These problems appeared not to be related to patient refusals.

Rating the appropriateness of coronary angiography--do practicing physicians agree with an expert panel and with each other?

BACKGROUND

Evaluations of the appropriateness of medical care are important to monitor the quality of care and to contain costs and enhance safety by reducing inappropriate care. Experts' views are usually incorporated into evaluations of appropriateness. However, practicing physicians may not concur with these views, and physicians' clinical backgrounds may influence their beliefs.

METHODS

We asked 1058 internists, family practitioners, and cardiologists in California, Florida, New York, Pennsylvania, and Texas to rate the appropriateness of coronary angiography after acute myocardial infarction for 20 common indications. Nine clinical experts also rated these indications using an established consensus method.

RESULTS

For 17 of the 20 indications, median ratings of surveyed physicians and the expert panel agreed within 1 unit on a 9-unit scale. Patients' older age had a negative effect on ratings by the expert panel but not on ratings by surveyed physicians. In multivariable analyses of surveyed physicians, cardiologists rated angiography as significantly more appropriate than did primary care physicians for complicated indications, and for uncomplicated indications cardiologists who performed invasive procedures gave higher appropriateness ratings for angiography than did cardiologists who did not perform such procedures and primary care physicians. For uncomplicated indications, physicians from hospitals providing coronary angioplasty and bypass surgery rated angiography as more appropriate than physicians from other hospitals. Physicians from New York and those employed by health maintenance organizations rated angiography as less appropriate than other physicians.

CONCLUSIONS

Surveyed physicians agreed with clinical experts about the appropriateness of coronary angiography after myocardial infarction for most indications, indicating that well-designed expert panels can closely reflect the views of practicing physicians. Variations in beliefs among practicing physicians suggest that evaluations of medical practice should incorporate the views of a range of relevant types of physicians.

Differences between primary care physicians and cardiologists in management of congestive heart failure: relation to practice guidelines

OBJECTIVES

This study was designed to characterize physician practices in the management of congestive heart failure (CHF) and to determine whether these practices vary by specialty and how they relate to guideline recommendations.

BACKGROUND

Congestive heart failure is responsible for considerable mortality, morbidity and health care resource utilization. Although there have been important advances in the diagnostic evaluation and treatment of CHF, little information is available on physician practices in this area.

METHODS

We surveyed physicians concerning their management of patients with CHF. The results were analyzed in multivariate models to determine the relation of diagnostic and treatment approaches to physician specialty, time since training, board certification and volume of patients with CHF. Surveys were sent to a sample of 2,250 family and general practitioners (FP/GPs), internists and cardiologists. Responses were examined in relation to guidelines issued by the Agency for Health Care Policy and Research that had been released 9 months previously.

RESULTS

Significant differences were found between physician groups with regard to each of the major guideline recommendations. For example, routine evaluation of left ventricular function, a point of emphasis in the guideline, is performed by 87% of cardiologists, but by only 77% of internists and 63% of FP/GPs (p < 0.001 between groups). Angiotensin-converting enzyme inhibitors were used by cardiologists, internists and FP/GPs in 80%, 71% and 60% of patients with mild to moderate CHF, respectively (p < 0.001 between groups). Larger differences were reported in the prescribed dosages of these drugs and their use in patients with renal dysfunction.

CONCLUSIONS

Cardiologists report practices more in conformity with published guidelines for CHF than do internists and FP/GPs. Because of the large numbers of patients with CHF and their substantial mortality, morbidity and cost of care, these differences may have a major impact on outcomes and health care costs.

Measuring and averting underuse of necessary cardiac procedures: a summary of results and future directions

BACKGROUND

Attempting to explain the marked variation in utilization of medical procedures has vexed health policy analysts for nearly three decades. Most health services research to date has been directed at identifying and reducing excessive utilization. Little attention has been given to underuse of care. THE LOS ANGELES CARDIAC UNDERUSE PROJECT OVERVIEW: A research group at the University of California, Los Angeles (UCLA), performed two separate, published studies seeking to measure underuse of coronary angiography and coronary artery revascu-larization (bypass surgery and angioplasty), two critical links in the chain of care leading from initial diagnosis of coronary artery disease to definitive treatment. In each study, the necessity criteria developed by the panel were used to identify patients needing an invasive procedure.

RESULTS

Within this population of patients (sampled predominantly from public hospitals), substantial underuse of clinically necessary coronary angiography (41% without refusers) and revascularization (23% without refusers) was detected. In this select population of patients, receiving a necessary revascularization procedure appeared to both reduce the risk of death and improve quality of life.

DISCUSSION

Despite limitations of the method, detection of underuse is feasible, valid, and affordable in the context of overall health care expenditures. Moreover, the case for implementing "underuse prevention" systems is increasingly compelling. Measuring and disseminating data on underuse of expensive but highly beneficial procedures would provide health care consumers (patients and employers) with useful information and enable health care providers to develop quality improvement strategies aimed at rational use of health care resources.

Acute myocardial infarction: clinical characteristics, management and outcome in a metropolitan Veterans Affairs Medical Center teaching hospital

OBJECTIVES

The influence of race and age on thrombolytic therapy, invasive cardiac procedures and outcomes was assessed in a Veterans Affairs teaching hospital. The influence of Q wave evolution on the use of invasive cardiac procedures and outcome was also assessed.

BACKGROUND

It is not well known how early revascularization procedures for acute myocardial infarction are delivered or influence survival in a Veterans Affairs patient population.

METHODS

From October 1993 to October 1995, all patients with myocardial infarction were identified by elevated creatine kinase, MB fraction (CK-MB) and one of the following: chest pain or shortness of breath during the preceding 24 h or electrocardiographic (ECG) abnormalities.

RESULTS

Racial groups were similar in terms of age, time to ECG, peak CK and length of hospital stay. Mortality increased with age (odds ratio [OR] 1.93, 95% confidence interval [CI] 1.33 to 2.81). A trend toward increased mortality occurred for race other than Caucasian. Patients meeting ECG criteria were given thrombolytic agents in 49% of cases, but age, comorbidity count and Hispanic race decreased the probability of thrombolytic use. Cardiac catheterization was performed more often after thrombolytic agents (OR 1.85, 95% CI 0.97 to 3.54), but less often in African-Americans (OR 0.59, 95% CI 0.35 to 1.02), older patients (OR 0.39, 95% CI 0.24 to 0.64) or patients with heart failure (OR 0.30, 95% CI 0.17 to 0.52). Patients evolving non-Q wave infarctions were older and had increased comorbidity counts and trends toward increased mortality. Angioplasty was chosen less for patients > or = 65 years old (p = 0.02); angioplasty and coronary artery bypass graft surgery were performed less in patients > or = 70 years old (p = 0.02). Patients treated invasively had lower mortality rates than those treated medically (p < 0.02).

CONCLUSIONS

The use of thrombolytic agents and invasive treatment plans declined with age, and mortality increased with age. Trends toward increased mortality occurred with non-Q wave infarctions and race other than Caucasian.

Do cardiologists do it better?

Pressure to lower the cost of health care delivery has fostered widespread efforts to limit patients' access to specialists such as cardiologists. However, there is concern that diminished specialist involvement may lead to poorer patient outcomes for specific clinical conditions. As part of a state-sponsored effort to improve the quality of health care in Pennsylvania, the Pennsylvania Health Care Cost Containment Council gathered clinical and administrative data on all 40,684 hospital admissions for acute myocardial infarction (AMI) in that state in 1993. They prepared a detailed public report that included risk-adjusted in-hospital mortality and length of hospital stay by physician group, by hospital and by region. These data demonstrate that patients cared for by cardiologists, as a group, had a lower risk-adjusted mortality than patients cared for by either internists (risk ratio 1.26, 95% confidence interval 1.17 to 1.35) or family practitioners (risk ratio 1.29, 95% confidence interval 1.18 to 1.40). The patients of cardiologists also had a shorter length of stay than the other two groups. These data suggest that there is enhanced value in the care provided by cardiologists for patients with AMI and call into question the growing trend toward reliance on generalists instead of specialists.

Using computer-based medical records to predict mortality risk for inner-city patients with reactive airways disease

Objective: To use routine data from a comprehensive electronic medical record system to predict death among patients with reactive airways disease.

Design: Retrospective cohort study conducted in an academic primary care internal medicine practice. Subjects were 1,536 adults with reactive airways disease: 542 with asthma and 994 with chronic obstructive pulmonary disease (COPD).

Measurements: The dependent variable was death from any cause within 3 years following patients' first primary care appointment in 1992. Multivariable logistic regression was used to identify independent predictors of 3-year mortality, with half of the patients used to derive the predictive model and the other half used to assess its predictability.

Results: Of the 1,536 study patients, 191 (12%) died in the 3-year follow-up period. From information available on or before patients' first primary care visit in 1992, multivariable predictors of 3-year mortality were coincidental heart failure, male sex, presence of COPD, lower weight, low serum albumin concentration level, and a prior arterial PO₂ of less than 60 mmHg; use of an inhaled corticosteroid was protective. The c-statistic (ROC curve area) in the validation cohort was 0.76, indicating good discrimination, and goodness of fit was excellent by Hosmer-Lemeshow chi-square (P > 0.5). Only 24% of the patients in the validation cohort were designated at high risk (estimated ≥15% 3-year mortality), but this group contained more than half of the deaths within 3 years for the entire cohort.

Conclusions: Data generated during routine care and stored in a comprehensive electronic medical record can accurately predict mortality among patients with reactive airways disease. Such technology can be used by practices to control for severity of illness when assessing clinical practice and to identify high-risk patients for interventions to improve prognosis.