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Biomedical subjects

W B Carter

Publications and source records attributed to W B Carter.

At least 55 records · Page 3Linked to original sources

The Veterans Administration Northwest Regional Health Services Research and Development Field Program: organization, activities, and early outcomes.

In 1982, the Veterans Administration established Health Services Research field programs in each of the six VA regions. Herein, we describe the historical origins, organization, responsibilities, activities, and early accomplishments of one of these programs--the Northwest Regional HSR&D field program. Special reference is made to this program's commitment to health services research relevant to geriatrics and gerontology, including the development of a system-wide agenda for research, information syntheses in geriatrics-relevant health services research topics, and the conduct of funded projects pertinent to care of the elderly. The importance of a medical center location for the field programs is discussed, and early indications of institutional impact are described.

Aged↗

Developing and testing a decision model for predicting influenza vaccination compliance.

Influenza vaccination has long been recommended for elderly high-risk patients, yet national surveys indicate that vaccination compliance rates are remarkably low (20 percent). We conducted a study to model prospectively the flu shot decisions and subsequent behavior of an elderly and/or chronically diseased (at high risk for complications of influenza) ambulatory care population at the Seattle VA Medical Center. Prior to the 1980-81 flu shot season, a random (stratified by disease) sample of 63 patients, drawn from the total population of high-risk patients in the general medicine clinic, was interviewed to identify patient-defined concerns regarding flu shots. Six potential consequences of influenza and nine of vaccination were emphasized by patients and provided the content for a weighted hierarchical utility model questionnaire. The utility model provides an operational framework for (1) obtaining subjective value and relative importance judgments from patients; (2) combining these judgments to obtain a prediction of behavioral intention and behavior for each patient; and, if the model is valid (predictive of behavior), (3) identifying those factors which are most salient to patient's decisions and subsequent behavior. Prior to the 1981-82 flu season, the decision model questionnaire was administered to 350 other high-risk patients from the same general medicine clinic population. The decision model correctly predicted behavioral intention for 87 percent and vaccination behavior for 82 percent of this population and, more importantly, differentiated shot "takers" and "nontakers" along several attitudinal dimensions that suggest specific content areas for clinical compliance intervention strategies.

Adult↗

The relationship of attitude changes to compliance with influenza immunization. A prospective study.

In a longitudinal, prospective study of patient's decisions about influenza vaccination, the stability of attitudes about the flu and flu shots, the stability of flu shot decisions, and the relationship of attitude shifts to compliance were studied. In both 1981 and 1982 for 216 patients at high risk for complications of influenza, attitudes about 15 issues in the decision to obtain a flu shot were measured and each patient's behavioral intention and flu shot behavior ascertained. From one year to the other, 53% of patients had at least two substantial attitude shifts, yet 91% of patients expressed the same behavioral intention, and 85% of patients had the same flu shot behavior. Reversals in flu shot decisions were closely related to shifts in attitudes concerning side effects of the flu shot, an association that was supported by other findings, including a marked difference in prevalence of previous side effects in shot takers (11%) versus nontakers (60%). The results suggest: intention reversals were less frequent than attitude shifts because only specific attitude changes about flu shots were associated with reversals, and interventions that induce positive attitude changes, especially about the side effects of flu shots, should be effective in improving flu shot compliance.

Adult↗

Emergency CPR instruction via telephone.

We initiated a program of telephone CPR (cardiopulmonary resuscitation) instruction provided by emergency dispatchers to increase the percentage of bystander-initiated CPR for out-of-hospital cardiac arrest. Cardiac arrests in King County, Washington were studied for 20 months before and after the telephone CPR program began. Bystander-initiated CPR increased from 86 of 191 (45 per cent) cardiac arrests before the program to 143 of 255 (56 per cent) cardiac arrests after the program. During the after period, 58 patients received CPR as a result of telephone instruction, 12 of whom were discharged. We estimate that four lives may have been saved by the program. A review of hospital records revealed no excess morbidity in the group of patients receiving dispatcher-assisted CPR.

Adult↗

A cross-cultural comparison of health status values.

The extent to which the values attached to health states are similar in different cultures or social groups is important for understanding health and illness behaviors and for developing standardized health status measures. A cross-cultural study was conducted to compare the health status values obtained in a United States population (Seattle, Washington) with those from another English-speaking culture (London, England) on the Sickness Impact Profile, a standardized measure composed of 136 items. London judges rated the severity of dysfunction described in each item on an equal interval scale using the same methods of scaling and analysis employed in the Seattle study. A regression of English mean item values on US mean values yielded a slope of 1.00 and an intercept of -0.07, indicating that judges gave strikingly similar ratings to most items. Agreement was higher at the more severe end of the dysfunction continuum than at the least severe end, a finding consistent with the notion that what constitutes health is more difficult to define than what constitutes illness. While a universal conception of dysfunction may exist in English-speaking societies, the social and cultural determinants of health status values deserve more systematic study.

Activities of Daily Living↗

An exploration of somatization among Asian refugees and immigrants in primary care.

The clinical records of Chinese, Filipino, Vietnamese, Laotian, and Mien patients in primary care were reviewed to determine the prevalence of somatization, its associated patient characteristics, and the manifested illness behavior. Patients in this study were generally poor, unemployed, and spoke little English. Somatization accounted for 35 per cent of illness visits. These visits were also more costly. Refugees had a higher rate of somatization (42.7 per cent) than immigrants (27.1 per cent). Although sociodemographic characteristics did not strongly differentiate patients with somatization from others, ethnicity and indicators of decreased resources such as large households with low income, households headed by single women, or a limited English proficiency were associated with somatization in certain ethnic groups. Somatization is thus an important health problem among Asian refugees and immigrants.

Adolescent↗

Development and implementation of emergency CPR instruction via telephone.

We developed a cardiopulmonary resuscitation (CPR) message that can be given via telephone by emergency dispatchers directly to an individual reporting a cardiac arrest. The message was developed and evaluated on the basis of empirical observation of CPR performance of 203 community volunteers during simulated cardiac arrest events. The majority of volunteers were women, aged 30 to 80 years, who had not had previous CPR training. An average of five ventilation and compression cycles were given within five minutes using telephone instruction. We judged the quality of CPR to be comparable to the performance of individuals who have received formal training. The specific words used in the message directly determined adequacy of performance, and resulted in significantly better CPR performance than did impromptu instruction offered by professional dispatchers (P less than or equal to .02).

Adult↗

Development and validation of a self-administered occupational health history questionnaire.

Although the diagnosis of work-related illness relies heavily on the occupational history, there is no validated or widely used questionnaire available to obtain this information. We designed an occupational health history questionnaire (OHHQ) in order to assess (1) its usefulness in obtaining exposure and work histories and (2) its ability to discriminate among workers with different degrees of hazardous exposure. A self-administered OHHQ was completed by 100 consecutive patients known to have a high probability of work-related disease (group 1) and by 55 consecutive workers at low risk for occupational toxic exposures (group 2). Group 1 was found to have a significantly higher number of self-assessed overall exposures (SAESs) than group 2 (p less than .001). Within group 1, scores of SAESs were highly correlated with an assessment by an industrial hygienist of the degree of hazardous exposure (p less than .001). The OHHQ can be feasibly self-administered; it has discriminant validity (correctly identifying groups of workers with high and low hazardous exposures) and convergent validity (correlating with an independent assessment of hazardous exposures).

Humans↗

Fulfillment of patient requests in a general medicine clinic.

For initial visits to a longitudinal-care internal medicine clinic, we elicited patients' requests for problems to be addressed, measured patients' assessments of request fulfillment, and determined correlates of request fulfillment. Patients rated all requests as fulfilled in 62 of 71 cases (87 per cent). Fewer pre-encounter patient-reported problems, discretionary features of the doctor-patient encounter including more time spent eliciting history of present illness, and greater completeness of laboratory testing were associated with request fulfillment.

Consumer Behavior↗

Pediatric clinicians' support for parents makes a difference: an outcome-based analysis of clinician-parent interaction.

Pediatric clinicians frequently must offer support (eg, reassurance) to anxious, stressed parents. Supportive clinician behaviors were studied to determine their impact on parents. Forty initial health supervision visits to a pediatric clinic were videotaped through a one-way mirror. Mothers were interviewed immediately before and 1 week after the visits to ascertain changes in concerns, opinions of clinicians, perceptions of infants, and self-confidence. Mothers also completed a postvisit satisfaction questionnaire. Coders blinded to these outcomes identified and enumerated three supportive clinician behaviors: encouragement, reassurance, and empathy. Analyses compared visit outcomes according to high and low levels of maternal exposure to clinician support. Mothers exposed to high levels of encouragement had significant improvement in their opinions of clinicians and higher satisfaction (P = .02). Mothers exposed to high levels of empathy had higher satisfaction and greater reduction in concerns (P less than .05). No significant differences in outcome were found for exposure to reassurance. Differences in visit outcomes were not related to either maternal demographic factors or clinician type (pediatricians v pediatric nurse practitioners). These results suggest that pediatric clinicians' support for parents makes a difference. Additional outcome-based analyses are needed to identify the full range of effective pediatric communication.

Adolescent↗

Responsiveness to maternal concern in preventive child health visits: an analysis of clinician-parent interactions.

Clinician-parent interactions in preventive child health visits should reflect parental concern. Variations in this visit process according to the level of maternal concern were explored. Forty initial visits to a pediatric clinic were videotaped. Mothers were interviewed before the visits to determine their concerns about their infants. Videotapes were analyzed using Resource Exchange Analysis, a clinically based method of interaction analysis. Highly concerned mothers had longer visits, initiated more interaction, sought more information, talked more about their infants, expressed more worry, and received more clinician empathy (all p less than 0.05). Analysis also showed significant differences in visit process according to clinician type and sex. Stepwise multiple regressions, controlling for clinician type and sex, revealed persistent contribution by maternal concerns to variance in visit process variables (all p less than 0.004), change in R2 0.16 to 0.32). It was concluded that clinician-parent interactions in the preventive child health visits are responsive to parental concerns.

Adult↗

Outcome-based doctor-patient interaction anaylsis: I. Comparison of techniques.

Interactional analysis (IA) systems have been devised and applied to doctor-patient dialogues to describe encounters and to relate process to outcomes. Prior work in this area has been typified by the use of a single taxonomy for classifying verbal behaviors and limited outcomes (compliance and/or satisfaction). We applied three different IA systems (Bales, Roter's modified Bales with affective ratings, and Stiles' "Verbal Response Modes") to 101 new-patient visits to a general medical clinic for which multiple outcomes had been determined: several measures of patient knowledge of problems at conclusion of visit; patient compliance with drugs (over the ensuing three months); and patient satisfaction with the visit (perceived technical, interpersonal and communication quality). Within IA systems, cross tabulations and multiple regressions were performed to relate encounter events to outcomes. Across IA systems, multiple regression R2 and R2 adjusted (R2a) for the number of independent variables entering were used to characterize strength of relationships. Roter's IA system showed stronger relationships to outcomes of knowledge (41% R2, 27% R2a) and compliance (44% R2, 28% R2a) than did Bales' or Stiles' systems. R2 for patient satisfaction was identical for Bales and Roter (35%), and greater than R2 for Stiles (14%). We conclude that choice of IA system for research or teaching purposes should be based on behaviors and outcomes of particular interest and importance to the user. Based on audioreview of tapes, Roter's approach is less time-consuming and may perform as well as more complex systems requiring transcript analysis.

Communication↗

Outcome-based doctor-patient interaction analysis: II. Identifying effective provider and patient behavior.

Three interactional analysis (IA) systems (Bales', Roters modified Bales and Stiles' "Verbal response modes") were used to characterize behavioral elements of provider-patient dialogues of 101 new-patient visits in a general medical clinic. In a previous article, the explanatory power of these IA systems was compared. In this article, specific provider and patient behaviors within segments of the encounter (introduction-history, physical examination and conclusion), which were shown to be related to encounter outcomes of knowledge, compliance and satisfaction, were examined. Review of interactional behaviors entering regression analysis with a significant F-to-enter (p less than or equal to 0.05) and supplementary contextual analyses suggested the importance of several categories of physician and patient behavior. Behaviors manifesting tension bear important and complex relationships to encounter outcomes. For example, patient and physician expressions of tension generally bear strong negative relationships to patient satisfaction, while patient expressions interpreted as tension release are positively related to both satisfaction and compliance. The timing of other behaviors appears to be critical to subsequent outcomes. If patient requests for medication occur early in the encounter, this behavior is positively related to subsequent patient satisfaction. However, if they occur in the concluding segment, a negative relationship results. Finally, several relationships taken together indicate that physician teaching in the concluding segment may be important. While useful observations may emerge from application of currently available IA techniques, the resulting information is best characterized as hypothesis-generating. These IA systems have many limitations, and research is needed to derived more clinically oriented systems that may permit more consistent demonstrations of critical process-outcome relationships.

Behavior↗

Screening for depression in geriatric medical patients.

Depression, a common and treatable psychiatric disorder in later life, is often overlooked in geriatric medical patients. The authors evaluated the validity of two self-rating depression scales, the Zung Self-Rating Depression Scale and the Popoff Index of Depression, for 55 elderly patients. They compared these ratings with the diagnosis assigned by a psychiatrist who was blind to scale results and who interviewed these patients using DSM-III criteria. The two scales correctly classified 80% and 69% of the subjects, respectively. The authors identify six items from the two scales that may serve as a simple screening instrument for the detection of depression in geriatric medical patients.

Aged↗