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Biomedical subjects

R C Mendenhall

Publications and source records attributed to R C Mendenhall.

At least 19 recordsLinked to original sources
PubMed1988

Case-mix and treatment in end-stage renal disease: hemodialysis v peritoneal dialysis.

The University of Southern California School of Medicine conducted a nationwide survey of 336 nephrologists to obtain demographic and clinical data on 6,411 patients with end-stage renal disease (ESRD). Patient demographic data, along with ESRD etiology and comorbid conditions noted by the physician, were compared across various modalities of dialysis. Characteristics of the treatment provided were differentiated by the mode of dialysis and the location of the patient encounter. Results of the analysis show that patients on peritoneal dialysis are more likely to be female and have higher rates of diabetes compared with hemodialysis (HD) patients. Statistically, patients on intermittent peritoneal dialysis are older, more likely to be black, and have a higher incidence of cardiovascular conditions. Continuous ambulatory peritoneal dialysis patients have greatest problem severity and require more physician time and more complex services, whereas home HD patients require the greatest number of diagnostic tests and therapeutic procedures. Hospital inpatient care shows greater case-mix severity and more intensive treatment, but this does not differ by the mode of dialysis. Finally, patients of freestanding dialysis facilities are more likely to have hypertensive renal disease, whereas patients at hospital-based facilities are older, more likely to be seen in the hospital, have more urgent and severe problems during dialysis rounds, and require more physician time, more complex services, and more diagnostic tests and therapeutic procedures.

Age Factors↗
PubMed1988

Do physicians spend less time with older patients?

In view of the additional time that older persons require for giving and receiving information, as well as for the examination process, it is important for manpower and reimbursement planning to better understand the nature of the physician-patient encounter with the elderly. We examined a series of national surveys of physicians' professional activities and found that physicians tend to spend less time with their older patients and also that encounter time by physicians in different specialties varies widely. Internists and cardiologists spend substantially more time with patients compared with general and family practitioners. For 65-74-year-old ambulatory patients, the average visit lengths are 18.3 minutes for internists, 18.0 for cardiologists, 11.2 for general practitioners, and 12.1 for family practitioners. Compared with ambulatory visit lengths for patients aged 45 to 64 years, average encounter times for 75-year-olds with family physicians were 0.8 minutes shorter, with general practitioners 1.2 minutes shorter, with internists 2.3 minutes shorter, and with cardiologists 3.0 minutes shorter. However, when all characteristics of the visit were considered, the effect of patient age remained significant only for general practitioners. A multivariate analysis of factors related to physician time for ambulatory care showed that more time is associated with multiple problems, problem severity, and the use of diagnostic testing. For general and family practice, the greater the number of previous visits for a problem, the shorter the encounter time is. Additional characteristics associated with shorter physician-patient encounter times include the volume of patients per week and the use of physician assistants within the practice. These findings have implications for medical education and manpower projections.

Age Factors↗
PubMed1988

Are physicians sensitive to the special problems of older patients?

The sensitivity of primary care physicians to the health care needs of older patients was explored by means of an analysis of the use of diagnostic tests and therapeutic procedures during ambulatory visits. Survey data on a total of 28,265 visits to internists, family and general practitioners were examined to determine possible age-related differences in care. The study found that diagnostic testing falls off significantly for patients 75 years of age or older and that internists use substantially more tests for each age group than do family and general practitioners. The pattern of use of diagnostic tests in this secondary analysis does not address the issue of "appropriateness" but does suggest a pattern that makes little sense based on the known distribution of disease and functional disability in aging populations.

Age Factors↗
PubMed1986

Patient counselling by primary care physicians: results of a nationwide survey.

The rate of patient counseling in primary care medicine is a pivotal element of inter-specialty differences in styles of care. Using national data on patient care provided in both ambulatory care settings and in the hospital, this study examines the use of counseling by general and family practitioners, pediatricians, internists, and obstetrician/gynecologists. The findings show substantial differences based on physician specialty, with highest rates of counseling for family practitioners and internists, and rates of patient education for these two specialties almost three times that for general practitioners. The data also show generally higher counseling rates for hospital care and for first encounters with patients, and a tendency for office-based pediatricians and solo general practitioners to use less patient counseling compared to their institution-based counterparts. Projections of annual visit rates for the United States show that general practice and internal medicine account for a disproportionate amount of patient counseling compared to other primary care specialties, based on patient volume.

Counseling↗
PubMed1984

The relative complexity of primary care provided by medical specialists.

Utilizing national data on patient care provided by family practitioners, general internists, and subspecialists in internal medicine, this study examines the complexity of care provided by generalist physicians versus subspecialty physicians on a disease-specific basis. Limiting the analysis to "principal care" provided by office-based physicians, the study finds the complexity of care provided by cardiologists for heart disease and by endocrinologists for diabetes mellitus to be somewhat greater than that provided by family practitioners and general internists, though the magnitude of the differences is not large. For chronic obstructive pulmonary disease, however, pulmonary disease specialists are shown to provide care that is substantially more complex than that provided by their generalist colleagues. For all disease and specialties, hospital care is substantially more complex than ambulatory care.

Adolescent↗
PubMed1984

Who provides health care to children and adolescents in the United States?

Face-to-face visits by children and adolescents in office-based practice in the mid-1970s were studied. Pediatricians, family physicians, and general practitioners accounted for 35%, 6%, and 30%, respectively, of all child visits. Although 40% to 45% of preventive and medical encounters were with pediatricians, only 12% of visits for minor surgery, 20% of visits for psychosocial problems, and 9% of visits for combined medical-surgical reasons were to pediatricians. Only in very young children did pediatricians provide a substantial proportion of care for each of the types of visits. For some common diagnoses (acne, refractive error) most care was provided by specialists other than primary care specialists, but less than 16% of all preventive care visits (including routine eye examinations) was provided by specialists other than primary care physicians. A substantial proportion of the prenatal care and management of minor trauma was provided by family physicians and general practitioners. Although the limitations of the study (including an average response rate of 55%, exclusion of certain specialties and institutional physicians, sampling at different times of the year, lack of control for area of location of practice, and lack of information about response rates of different types of physicians within each specialty) preclude definitive conclusions, the findings raise important questions for future study.

Adolescent↗
PubMed1983

A profile of pediatric practice in the United States.

We profiled pediatric practice in the United States through a second-order analysis of data gathered in 1977 from 429 practicing pediatricians. Age, sex, board certification status, practice arrangement, and practice location of pediatricians in the United States were evaluated, as well as their patterns of practice. The number of and reasons for visits made to pediatricians by patient age and sex were tabulated. Child health supervision and diseases of the upper and lower parts of the respiratory tract accounted for 84.5% of the principal diagnoses made in 21,784 visits to the sample of pediatricians studied. These data may be useful in planning pediatric primary care residency training program curricula and in making planning decisions regarding the number and distribution of pediatricians nationally.

Adolescent↗
PubMed1982

Manpower for obstetrics-gynecology. III. Contributions to total female medical care.

This final report from the cooperative manpower study of the University of Southern California and The American College of Obstetricians and Gynecologists describes the development of a female data file that outlines the care of women patients by all specialties. Obstetrician-gynecologists are compared to other specialists; they see 300,000 women per day in the United States and provide a wide range of care. Preventive care plays a larger role than in other major specialties, patient counseling and education are emphasized, and obstetric care is a major commitment. Nonetheless, acute and serious surgical and medical diagnoses are an important component of the practices of obstetrician-gynecologists.

Adolescent↗
PubMed1982

Effect of patient age on duration of medical encounters with physicians.

The authors analyzed the USC/DRME Practice Study data to determine if the characteristics of physician patient encounters change with patient age. The only significant change observed was a decline in encounter time for patients 65 years of age and older compared with those 45 through 64 years of age. This decrease was significant for raw data and for data weighted for the number of physicians of various types and standardized for complexity of case mix in various age groups, also for both nonhospital and hospital encounters and for almost all classes of encounters. Three types of generalists and four types of medical subspecialists were studied; encounter times for all types were, for patients 65 and older, either the same as or less than those for patients 45 through 64. The observed phenomenon may reflect a conscious decision on the part of some physicians to allot less time to elderly patients.

Age Factors↗
PubMed1982

The professional role of physician's assistants in adult ambulatory care practices.

This article describes the methodology and findings of a national survey of Physician's Assistants (PAs) in adult, ambulatory care practices. Data on patient care roles and other professional activities were collected for a three-day period via a comprehensive self-reporting, log-diary instrument. Completing the instrument were 356 (50.4%) PAs. Survey results address the following questions: What is the typical work week for PAs? How do PAs allocate their time in a professional day? What direct patient care services do PAs provide? How productive are PAs with respect to number of patients seen and dollar income generated? In general, the data are consistent with the PA role model of a primary health care professional who provides basic health care services with an emphasis on patient counseling and disease prevention.

Ambulatory Care↗
PubMed1982

Neurosurgical manpower: the physician's viewpoint.

This paper reports a national study of physicians in 24 medical and surgical specialties, and reveals the opinions of neurosurgeons and their professional colleagues with regard to the adequacy of the supply of neurosurgical manpower. Among neurosurgeons, 30.4% believe the supply to be excessive, 60.1% think it is about right, 7.5% believe that there is a shortage, and 2.0% have no opinion. Neurologists' opinions do not differ significantly from those of neurosurgeons, but physicians and surgeons in 22 other specialties are significantly less likely to regard the supply as excessive and are more likely to perceive a shortage. Primary care physicians, as a group, are most likely to perceive a shortage, and least likely to indicate an excess. Among the 24 specialties studied, 9.3% of physicians believe the supply of neurosurgeons to be excessive, 55.1% think it is about right, 22.9% believe that there is a shortage, and 12.8% have no opinion.

Attitude of Health Personnel↗
PubMed1981

Neurosurgery in the United States: a log-diary study.

The Division of Research in Medical Education and of the University of Southern California, with the cooperation and assistance of the American Association of Neurological Surgeons and the Congress of Neurological Surgeons, has conducted a national study of the professional activities of neurological surgeons in the United States. One of a series of 24 surveys of medical and surgical specialties, the survey obtained information on patient workloads, the allocation of physician time, the characteristics of patients and the circumstances under which they were seen, patient diagnoses, and the care that was provided--including whether an operation was performed. This paper provides a selection of the findings deemed most relevant to manpower issues in neurosurgery. A later paper will examine regional differences in patient care, including the frequency with which selected surgical procedures are used for different clinical conditions.

Commission on Professional and Hospital Activities↗
PubMed1980

Manpower for obstetrics and gynecology. II. Characteristics of patients; their diagnoses and care.

A further report from the cooperative manpower study of the University of Southern California American College of Obstetricians and Gynecologists has identified characteristics of patients and their diagnoses and classified types of patient-physician encounters. Obstetrician-gynecologists care for women mainly between the ages of 20 and 44, deal two thirds of the time with only five diagnostic categories in the office and 10 in the hospital, and provide primary care in 78.2% of all patient encounters.

Adolescent↗
PubMed1980

Assessing the utilization and productivity of nurse practitioners and physician's assistants: methodology and findings on productivity.

This article describes the research design, survey instrument and methodology employed in a national study to assess the utilization and productivity of nurse practitioners and physician assistants (NP/PAs) in primary care settings. All practices (N = 455) used in the study employed formally trained NP/PAs who treated, or were eligible to treate, Medicare patients on an outpatient basis, and included a general practitioner, family practitioner or a general internist as the supervising physician. A matched group of comparison practices were subject to the same eligibility criteria except that they did not employ NP/PAs. A comprehensive diary-type instrument focusing on patient care was used to collect detailed data on each practitioner's daly professional activities. Data are presented on the productivity of NPs, PAs and physicians as measured by seven basic variables related to patient volume, time in patient care and revenue generated. Numerous inter- and intraspecialty comparisons were made across various practice arrangements and across location variables such as rural vs. urban, remote vs. nonremote, and health care resource areas. Interpretations of the data indicate clearly that PAs are considerably more productive than NPs. However, although NPs spend more time with individual patients, the cause of this differential productivity was not revealed.

Delivery of Health Care↗
PubMed1979

The contribution of specialists to the delivery of primary care.

Despite increased numbers of medical-school graduates and opportunities for "primary-care" specialty training since the mid-1960's, many believe that the shortage of physicians delivering generalist care will continue through the 1980's. Missing, however, is solid information on the role of physician specialists in providing such care. Two national studies have shown that one of every five Americans now receives continuing general medical care from a specialist physician. Our study suggests that, despite the current shortage of generalist-physician services, continuing specialist participation in primary care will lead to sufficient generalist medical services by the mid-1980's. Whether specialist participation is the most appropriate or cost-effective way to improve access to such care is unclear. However, until this question is resolved, more governmental regulation of graduate medical education may be unwise. Offering all physicains, regardless of specialty, more primary-care experience during residency training might better deal with this aspect of American medical practice.

California↗
PubMed1979

A national study of medical and surgical specialties. III. An empirical approach to the classification of patient care.

A major feature of a national survey of medical and surgical specialties is the development and application of an algorithm for classifying patient care services provided by physicians. The care classification reflects much of prevailing opinion regarding what constitutes primary and nonprimary care. The classification system provides a powerful tool for the analysis of patient care services, since it is based on conditions of access to care, the physician's role in providing the care, measures associated with continuity of care, and a proxy measure of comprehensiveness of care. Furthermore, it is based on the recordings by physicians of actual patient-encounter characteristics and is not operationally dependent on physician characteristics or propensities.

Cardiology↗
PubMed1979

A study of the practice of otorhinolaryngology in the United States. Initial findings.

Results of a national survey of nonfederal otorhinolaryngologist regarding their practices provide the following portrait of the typical physician who specializes in otorhinolaryngology: male, between 35 and 45 years old, engaged in solo practice in a metropolitan area in the southern part of the country. He works a 46-hour week, devoting most of his time to patient care. During a typical week, he sees 113 patients, mostly outside the hospital. Half of his patients are male; although their average age is 35, one fourth of his patients are under 15 years. Every third patient is new to him; every other patient has been referred. He spends almost 15 minutes with each patient, many of whom he is seeing on a continuous basis for a problem involving the ear. He prescribes medications in roughly half of all encounters; every tenth patient requires surgery. He rates the majority of the problems he encounters as chronic, and of minor to moderate severity and urgency--for which he provides services of limited complexity or less. He seldom refers his patients.

Adolescent↗