Biomedical subjects

K B Wells

Publications and source records attributed to K B Wells.

At least 109 records · Page 6Linked to original sources

PubMed1989

Detection of depressive disorder for patients receiving prepaid or fee-for-service care. Results from the Medical Outcomes Study.

We estimated clinicians' awareness of depression for patients with current depressive disorder (N = 650) who received care in either a single-specialty solo or small group practice, a large multispecialty group practice, or a health maintenance organization in three US sites. Depressive disorder was determined by independent diagnostic assessment shortly after an office visit. Detection and treatment of depression were determined from visit-report forms completed by the treating clinician. Depending on the setting, from 78.2% to 86.9% of depressed patients who visited mental health specialists had their depression detected at the time of the visit, compared with 45.9% to 51.2% of depressed patients who visited medical clinicians, after adjusting for case-mix differences. Among patients of mental health specialists, there were no significant differences by type of payment in the likelihood of depressive disorder being detected or treated. Among patients of medical clinicians, however, those receiving care financed by prepayment were significantly less likely to have their depression detected or treated during the visit than were similar patients receiving fee-for-service care.

Adult↗

PubMed1989

The functioning and well-being of depressed patients. Results from the Medical Outcomes Study.

We describe the functioning and well-being of patients with depression, relative to patients with chronic medical conditions or no chronic conditions. Data are from 11,242 outpatients in three health care provision systems in three US sites. Patients with either current depressive disorder or depressive symptoms in the absence of disorder tended to have worse physical, social, and role functioning, worse perceived current health, and greater bodily pain than did patients with no chronic conditions. The poor functioning uniquely associated with depressive symptoms, with or without depressive disorder, was comparable with or worse than that uniquely associated with eight major chronic medical conditions. For example, the unique association of days in bed with depressive symptoms was significantly greater than the comparable association with hypertension, diabetes, and arthritis. Depression and chronic medical conditions had unique and additive effects on patient functioning.

Adult↗

PubMed1989

The effects of insurance generosity on the psychological distress and psychological well-being of a general population.

Reductions in the generosity of fee-for-service insurance lower the use of general medical and mental health services, but do they lead to lower mental health status for the covered population? We addressed this question using data from the RAND Corporation Health Insurance Experiment. Families in six sites in the United States were randomly assigned to one of 14 insurance plans for three- or five-year periods. On average, there were no significant adverse effects of cost-sharing plans, relative to a free-care plan, on either psychological well-being or psychological distress, when the cost-sharing plans included full catastrophic coverage. Those with high mental health status but low income at baseline had significantly more favorable mental health outcomes on the cost-sharing plans than on the free-care plan. We cannot definitively comment on the effects of insurance generosity for the sick poor. Our findings apply in the context of mandated comprehensive mental and general health coverage for a general nonelderly, nondisabled household population.

Adult↗

PubMed1989

The preparedness of freshman medical students for taking sexual histories.

With recent epidemics of sexually transmitted diseases, it is increasingly important for medical students to be well prepared to take sexual histories. The authors studied this issue through a self-administered questionnaire completed by first-year medical students at two western U.S. medical schools (response rate 87%). Students who were better prepared (i.e., more knowledgeable, more comfortable, more appropriate attitudes) had more personal sexual experience and were more likely to have spoken with either a physician or a patient about a personal sexual concern. Different student characteristics were associated with different domains of preparation for taking a sexual history (e.g., knowledge v.s. attitudes). The educational implications of these findings are discussed.

Education, Medical, Undergraduate↗

PubMed1989

Affective, substance use, and anxiety disorders in persons with arthritis, diabetes, heart disease, high blood pressure, or chronic lung conditions.

The authors estimated the sex- and age-adjusted prevalence of affective, substance use, and anxiety disorders in persons in a general population sample who identified themselves as having arthritis, diabetes, heart disease, high blood pressure, chronic lung disease, or no chronic medical conditions. Persons who reported ever having arthritis, heart disease, chronic lung disease, or high blood pressure had a significantly increased adjusted prevalence of each of the three groups of lifetime psychiatric disorders, relative to a no-chronic conditions comparison group (each p less than 0.05). Persons who ever had diabetes had an increased adjusted prevalence of lifetime affective and anxiety but not substance use disorder. Persons with current (i.e., active) arthritis, heart disease, or high blood pressure had a significantly increased adjusted prevalence of recent (6-month) anxiety disorder, whereas those with current chronic lung disease had an increased adjusted prevalence of recent affective and substance use but not anxiety disorder.

Adult↗

PubMed1989

Chronic medical conditions in a sample of the general population with anxiety, affective, and substance use disorders.

The authors studied the prevalence of eight chronic medical conditions in an adult population sample (N = 2,554) with and without psychiatric disorders. Adjusted for age and sex, the prevalence of any lifetime chronic medical condition for persons with any lifetime affective, anxiety, or substance use disorder was 61.4%, 57.1%, and 57.7%, respectively. Each of these percentages was significantly higher than that for persons with no lifetime psychiatric disorder (53.4%). Both lifetime affective and anxiety disorders were uniquely associated with a greater prevalence of any lifetime chronic medical condition, but the only psychiatric disorders uniquely associated with current (i.e., active) chronic medical conditions were anxiety disorders, suggesting that the association between anxiety disorders and chronic medical conditions develops more quickly than associations between medical conditions and other psychiatric disorders.

Adult↗

PubMed1989

Acculturation and the probability of use of health services by Mexican Americans.

How does level of acculturation affect the probability that Mexican Americans use general health, mental health, and human social services? We studied this question using data from a general population sample of Mexican Americans (N = 1,055). Data were elicited in face-to-face interviews. After controlling for sociodemographic and economic factors, health status, and insurance coverage, Mexican Americans who were less acculturated had significantly lower probabilities of an outpatient medical visit for physical health problems and of a visit to a mental health specialist or human service provider for emotional problems. The less acculturated with good perceived general health were especially unlikely to receive outpatient medical care. Having Medicaid coverage was associated with a larger increase in the probability of an inpatient medical admission for the more acculturated than for the less acculturated. Other individual characteristics had generally similar effects on use of medical and mental health services for both the more and the less acculturated Mexican Americans.

Acculturation↗

PubMed1988

Agreement between face-to-face and telephone-administered versions of the depression section of the NIMH Diagnostic Interview Schedule.

To increase the feasibility of identifying persons with depressive disorders in a large-scale health policy study, we tested the concordance between face-to-face and telephone-administered versions of the depression section of the NIMH Diagnostic Interview Schedule (DIS). This section was administered over the telephone to 230 English-speaking participants of the Los Angeles site of the NIMH Epidemiologic Catchment Area Program (ECA) after their completion of a face-to-face interview (Wave II) with the full DIS. Time lag between interviews was 3 months, on the average. Persons with depressive symptoms were oversampled. Using the face-to-face version as the criterion measure, the sensitivity, specificity, and positive predictive value of the telephone version for identifying the presence or absence of any lifetime unipolar depressive disorder were 71, 89, and 63 percent, respectively; the kappa statistic was 0.57, and agreement was unbiased. The comparable figures for concordance between two face-to-face interviews administered one year apart to the same subjects were 54, 89, and 60 percent and 0.45 (kappa), respectively. Thus, disagreement was due primarily to test-retest unreliability of the DIS rather than the method of administration.

Adolescent↗

PubMed1988

The demand for episodes of mental health services.

Observational studies of demand for mental health services showed much greater use by those with more generous insurance, but this difference may have been due to adverse selection, rather than in response to price. This paper avoids the adverse selection problem by using data from a randomized trial, the RAND Health Insurance Experiment (HIE). Participating families were randomly assigned to insurance plans that either provided free care or were a mixture of first dollar coinsurance and free care after a cap on out-of-pocket spending was reached. We estimate that separate effects of coinsurance and the cap on the demand for episodes of outpatient mental health services. We find that outpatient mental health use is more responsive to price than is outpatient medical use, but not as responsive as most observational studies have indicated. Those with no insurance coverage would spend about one-quarter as much on mental health care as they would with free care. Coinsurance reduces the number of episodes of treatment, but has only a small effect on the duration and intensity of use within episodes. Users appear to anticipate exceeding the cap, and spend at more than the free rate after they do so.

Data Collection↗

PubMed1988

Factors affecting the probability of use of general and medical health and social/community services for Mexican Americans and non-Hispanic whites.

Are individual characteristics associated with use of general and mental health and human service sectors similar for Mexican Americans (MAs) and non-Hispanic whites (NHWs)? We addressed this question using data from the Los Angeles site of the NIMH Epidemiologic Catchment Area Program. A random sample of the general population of two mental health catchment areas was interviewed in 1983-1984. With four exceptions, individual variation in sociodemographic factors, insurance coverage, and health status had similar effects on the probability of use of the general and mental health and human service sector for both NHWs and MAs. Recent psychiatric disorder was associated with greater use of general medical providers for mental health care for both NHWs and MAs, but significantly more so for NHWs. Female NHWs were more likely to use the human service sector (e.g., social service agencies) than male NHWs, but gender had no effect on this type of use for MAs. Higher job status was associated with greater use of outpatient general medical services, but significantly more so for NHWs than MAs. By contrast, having private health insurance was associated with a greater increase in use of outpatient general medical services for MAs than for NHWs.

Adult↗

PubMed1988

Management of patients on psychotropic drugs in primary care clinics.

While nonpsychiatrist physicians account for the majority of prescriptions written for psychotropic drugs, little is known about the quality of their drug management strategy. We studied this issue using data from 16 academic internal medicine group practices. Data on treatment, abstracted from medical records, were compared to criteria for quality care. Eighteen percent of patients used minor tranquilizers or antidepressants. The only individual factor independently associated with use of minor tranquilizers was mental health status. Nonwhites were less likely than whites to be diagnosed as depressed or receive antidepressants, even after controlling for baseline mental and physical health status. Mental and physical health status were also independently associated with antidepressant drug use. Quality of care was low for formulating a treatment plan for either drug group and for follow-up plans for antidepressants. Documentation of an adequate treatment plan for minor tranquilizers was poorest for patients who visited a house staff or nonphysician rather than a faculty member. For antidepressants, the patients with the poorest general health status tended to have the best documentation of treatment plans.

Adult↗

PubMed1988

Development of a brief screening instrument for detecting depressive disorders.

A very short (8-item), self-report measure was developed to screen for depressive disorders (major depression and dysthymia). The screener departs from traditional depressive symptom scales in that 1) individual items are differentially weighted and 2) two of the eight items concern diagnostically-relevant durations of depressed mood. Analyses of data from a general population and from primary care and mental health patients showed that the screener had high sensitivity and good positive predictive value for detecting depressive disorder, especially for recent disorders and those that met full DSM-III criteria. The high predictive utility of the screener, in combination with its brevity, suggests that it may be a useful tool for screening for depression in health care settings.

Adult↗

PubMed1988

How comfortable do first-year medical students expect to be when taking sexual histories?

The authors assessed the expected degree of comfort among first-year students at two California medical schools in taking a sexual history from four types of patients: heterosexual men; heterosexual women; homosexual (men and women combined); and an AIDS patient. Data were from questionnaires administered at two California medical schools (response rate = 87%). Students expected to be significantly more comfortable with heterosexual patients who were the same sex as the student. Students who had previously taken a sexual history anticipated relatively more comfort with heterosexual patients. The lowest expected comfort was for the AIDS patient. Older students expected to be more comfortable with the AIDS patient, independent of the student's personal sexual experience. Students with a homosexual friend anticipated more comfort with both the AIDS patient and the homosexual patients.

Acquired Immunodeficiency Syndrome↗

PubMed1988

Psychiatric disorder and limitations in physical functioning in a sample of the Los Angeles general population.

The authors examined relationships between psychiatric disorder and perceived general health and physical functioning from data obtained from interviews with 2,554 non-Hispanic whites and Mexican-Americans in Los Angeles. Persons with recent psychiatric disorders perceived their general health as poorer and had more limitations in physical functioning than persons without such disorders, even when the analyses controlled for chronic medical conditions and demographic factors. Affective and anxiety disorders were independently associated with both acute and chronic limitations in physical functioning. The associations of recent psychiatric disorder and of chronic medical condition with acute activity restrictions were similar in magnitude.

Activities of Daily Living↗

PubMed1988

Psychiatric disorder in a sample of the general population with and without chronic medical conditions.

The authors studied data on psychiatric disorders and eight chronic medical conditions in a community sample of 2,554 persons. The sex- and age-adjusted prevalence of any psychiatric disorder in the preceding 6 months was 24.7% and of lifetime psychiatric disorder was 42.2% among persons with one or more medical conditions, compared to 17.5% and 33.0%, respectively, for persons with no medical condition. Persons with chronic medical conditions were more likely to have lifetime substance use disorders and recent affective and anxiety disorders. Arthritis, cancer, lung disease, neurological disorder, heart disease, and physical handicap were strongly associated with psychiatric disorders, but hypertension and diabetes were not.

Adult↗

PubMed1988

Quality-of-care research in mental health: responding to the challenge.

Quality-of-care research in mental health is in the developmental stages, which affords an opportunity to take an integrative approach, building on principles from efficacy, effectiveness, quality assessment, and quality assurance research. We propose an analytic strategy for designing research on the quality of mental health services using an adaptation of the structure, process, and outcome classification scheme. As a concrete illustration of our approach, we discuss research on a particular target population-patients with chronic schizophrenia. Future research should focus on developing models of treatment, establishing criteria and standards for outcomes and processes, and gathering data on community practices.

Humans↗

PubMed1987

Use of outpatient mental health services over time in a health maintenance organization and fee-for-service plans.

The authors compared the use of outpatient mental health services in a health maintenance organization (HMO) and fee-for-service plans over a 5-year period, using data from a randomized controlled trial. In any given year, enrollees in the HMO and a fee-for-service plan with identical benefits were equally likely to visit a mental health specialist. Over several years, the HMO enrollees were about 50% more likely ever to visit a mental health specialist; fee-for-service enrollees were more likely to receive mental health care in more than 1 study year.

Adult↗

PubMed1987

Which Mexican-Americans underutilize health services?

Data collected from the Los Angeles site of the National Institute of Mental Health Epidemiologic Catchment Area Program were used to examine the utilization of health services in a community population. Mexican-Americans, especially the less acculturated, had significantly lower rates of use of outpatient, but not inpatient, care than non-Hispanic whites. Differences were greater for mental than physical health care. Less acculturated Mexican-Americans made very little use of either mental health specialists or the human services sector (e.g., religious leaders). Among those with a recent psychiatric disorder, non-Hispanic whites were seven times more likely to use outpatient mental health services than the less acculturated Mexican-Americans.

Acculturation↗