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Biomedical subjects

B L Thompson

Publications and source records attributed to B L Thompson.

At least 19 recordsLinked to original sources
PubMed2001

Performance measures: are we measuring what matters?

BACKGROUND: The ultimate intent of healthcare performance measures is to improve health status by stimulating improvements to healthcare quality. This report evaluates how well current performance measurement sets address the leading causes of illness and death in the United States, using the Health Plan Employer Data and Information Set (HEDIS) as an example. METHODS: We assessed whether HEDIS measures exist for the leading causes of illness and death according to five commonly used indices: physiologic cause of death, underlying cause of death, disability-adjusted life years, healthcare expenditures, and missed work days. RESULTS: Fewer than one half of the leading causes of morbidity and mortality are addressed by current measures. CONCLUSIONS: The opportunities for using accurate and meaningful measurement for disease prevention and health promotion are substantial, yet this potential remains only partly realized and depends on further expansion of performance measurement efforts.

Cause of Death↗
PubMed2001

Measuring clinical performance: comparison and validity of telephone survey and administrative data.

OBJECTIVE: To compare and validate self-reported telephone survey and administrative data for two Health Plan Employer Data and Information Set (HEDIS) performance measures: mammography and diabetic retinal exams. DATA SOURCES/STUDY SETTING: A telephone survey was administered to approximately 700 women and 600 persons with diabetes randomly chosen from each of two health maintenance organizations (HMOs). STUDY DESIGN: Agreement of survey and administrative data was assessed by using kappa coefficients. Validity measures were assessed by comparing survey and administrative data results to a standard: when the two sources agreed, that was accepted as the standard; when they differed, confirmatory information was sought from medical records to establish the standard. When confirmatory information was not available ranges of estimates consistent with the data were constructed by first assuming that all persons for whom no information was available had received the service and alternately that they had not received the service. PRINCIPAL FINDINGS: The kappas for mammography were .65 at both HMOs; for retinal exam they were .38 and .40. Sensitivity for both data sources was consistently high. However, specificity was lower for survey (range .44 to .66) than administrative data (.99 to 1.00). The positive predictive value was high for mammography using either data source but differed for retinal exam (survey .69 to .78; administrative data .99 to 1.00). CONCLUSIONS: Administrative and survey data performed consistently in both HMOs. Although administrative data appeared to have greater specificity than survey data the validity and utility of different data sources for performance measurement have only begun to be explored.

Adult↗
PubMed2000

Effects of TRH on acoustic startle, conditioned fear and active avoidance in rats.

The effects of intracerebroventricular injection of thyrotropine-releasing hormone (TRH) on acoustic startle, conditioned fear and active avoidance were examined in rats. Acoustic startle was significantly depressed by 12.5 microg TRH, while increasing motor activity. In a fear-potentiated startle paradigm, 12.5 microg TRH reduced the overall startle response amplitude, but did not decrease the amount of fear-potentiated startle. When TRH was administered 15 min before contextual fear conditioning, neither fear-related freezing in acquisition nor in a retention test was affected. In contrast, when TRH was administered 15 min before the retention test, TRH significantly reduced mean percentage of time spent freezing. TRH had no effect on active avoidance. The results demonstrate that TRH decreased acoustic startle and freezing responses, but had little effect on fear conditioning and active avoidance. It is suggested that the results may be due to TRH's effects on motor activity and arousal, independent of its effects on fear.

Acoustic Stimulation↗
PubMed2000

Time course and pattern of compensatory ingestive behavioral adjustments to lysine deficiency in rats.

We and others have demonstrated that rats deficient in an essential amino acid (EAA) will consume sufficient quantities of the lacking nutrient to produce repletion when it is made available in solution. In the current series of experiments, we made rats deficient in lysine (LYS) by limiting the level of this EAA in the diet. We then examined licking behavior during approximately 23-h two-bottle intake tests over 4 consecutive days. In three separate experiments, rats were presented with the following: 1) 0.1 mol/L LYS and water, 2) 0.2 mol/L threonine (THR) and water and 3) 0.1 mol/L LYS and 0.2 mol/L THR. Lysine-deficient (LYS-DEF) rats drink significantly more LYS than did nondepleted controls (CON) when this amino acid was available. Meal pattern analysis revealed that the enhanced intake of LYS occurred as a function of a greater number of ingestive bouts, not changes in bout size. A cumulative analysis of LYS intake between CON and LYS-DEF rats revealed that a potentiation of intake developed within 30 min of sampling the solution when LYS and water were available and within 90 min when LYS and THR were the contrasting choices. In conclusion, increased LYS intake in the deficient rats occurs relatively rapidly and appears to be at least somewhat specific. Moreover, LYS deficiency does not seem to enhance the palatability of the limiting amino acid as judged by behaviors such as lick rate and bout size. Instead, LYS-DEF rats relieve the deficiency by increasing the number of drinking episodes initiated.

Animals↗
PubMed2000

Tracking clinical preventive service use: a comparison of the health plan employer data and information set with the behavioral risk factor surveillance system.

BACKGROUND: There is a need for meaningful and accurate ways of tracking preventive service delivery among different sectors of the US population. OBJECTIVES: To compare methodologies of and clinical preventive service use estimates obtained from 2 data sets: the Health Plan Employer Data and Information Set (HEDIS 3.0) and the Behavioral Risk Factor Surveillance System (BRFSS). METHODS: HEDIS used a combination of mailed-survey, administrative, and medical-record data to measure preventive service use among commercial enrollees of 320 HMOs in 42 states during 1996. BRFSS data are from insured respondents (excluding those reporting Medicare or Medicaid coverage) to a random-digit-dialed telephone survey conducted in the same 42 states during 1996. RESULTS: The median state-specific mammography, Papanicolaou smear, and retinal examination rates reported by HEDIS were consistently and substantially lower than those reported by BRFSS. For mammography, the median HEDIS rate was 72.4%, compared with 81.1% for BRFSS. For Papanicolaou smear and retinal examinations, HEDIS rates were 72.7% and 40.8%, respectively, compared with 91.2% and 61.6% for BRFSS. The median state rates of advice to quit smoking reported by HEDIS were similar to those for BRFSS: 62.1% versus 62.2%, respectively. For each measure, the absolute difference between HEDIS and BRFSS rates varied substantially both within a state and between states. CONCLUSIONS: It does not appear that the BRFSS and HEDIS data can be compared directly to accurately track progress toward national preventive health objectives. This study highlights some of the problems with comparing these data and possible means for addressing the discrepancies.

Adult↗
PubMed2000

What people really know about their health insurance: a comparison of information obtained from individuals and their insurers.

OBJECTIVES: This study determined the validity of self-reported data on selected health insurance characteristics. METHODS: We obtained telephone survey data on the presence of health insurance, source of insurance, length of time insured, and type of insurance (managed care or fee-for-service) from a random sample of 351 adults in 3 Wisconsin counties and compared findings with data from respondents' health insurers. RESULTS: More than 97% of the respondents correctly reported that they were currently insured. For source of insurance among persons aged 18 to 64 years, sensitivity was high for those covered through private health insurance (93.8%) but low for those covered through public insurance (6.7%). Only 33.1% of the respondents accurately categorized length of enrollment in their current plan. Overall estimates for managed care enrollment were similar for the 2 sources, but individual validity was low: 84.2% of those in fee-for-service believed that they were in managed care. CONCLUSIONS: Information obtained from the general population about whether they have health insurance is valid, but self-reported data on source of insurance, length of time insured, and type of insurance are suspect and should be used cautiously.

Adolescent↗
PubMed1999

Trends in perceived cost as a barrier to medical care, 1991-1996.

OBJECTIVES: This study examined trends in perceived cost as a barrier to medical care. METHODS: The Behavioral Risk Factor Surveillance System was used to analyze monthly telephone survey data from 45 states. RESULTS: Overall, the percentage of persons perceiving cost as a barrier to medical care increased from 1991 until early 1993 and then declined to baseline values in late 1996. Perceived cost was a greater barrier in 1996 than in 1991 for persons with low incomes and for those who were unemployed and uninsured. For self-employed persons, percentages increased until mid-1993 and then remained constant. CONCLUSIONS: Further efforts are needed to improve access to medical care for socially disadvantaged populations.

Adult↗
PubMed1999

Do patients' ethnic and social factors influence the use of do-not-resuscitate orders?

OBJECTIVES: To determine whether ethnic and other social factors affect how frequently do-not-resuscitate (DNR) orders are written, the timing of DNR orders, or patient involvement in the DNR decision. DESIGN: Retrospective cohort. METHODS: Patients who died in one urban teaching hospital on the medicine, cardiology, or family practice service during 1988 were eligible; 288 were included in the analyses. Chi-square tests and logistic regression were used to examine frequency of DNR orders and patient involvement; analysis of variance and linear regression were used to examine timing of the DNR orders. RESULTS: Non-whites were more likely than whites to have DNR orders (OR 1.76; 95% CI, 1.09-2.84) but timing of the DNR order did not vary significantly by race/ethnicity. Patients who spoke English fluently were more likely to be involved in the DNR decision than those who did not (OR 1.28; 95% CI, 1.01-1.61). Patients with documented human immunodeficiency virus were more likely than uninfected patients to have DNR orders (OR 3.51; 95% CI, 1.36-9.02), to be involved in the decision (OR 10.11; 95% CI, 4.87-21.00); and to have DNR orders written earlier (P = 0.02). Alcoholic patients were more likely than non-alcoholics to have DNR orders (OR 1.17; 95% CI, 1.04-1.33). CONCLUSIONS: Ethnic and other social factors do appear to play a role in DNR decisions. It needs to be determined if these differences are due to patient preferences or clinician characteristics.

Adult↗
PubMed1999

Assessment of health risk behaviors. A tool to inform consumers, providers, health care organizations, and purchasers.

INTRODUCTION: Tobacco use, diet and physical activity patterns, and alcohol use are the leading causes of death in the United States. To make major improvements in the health status of the population, behavioral risk factors for disease must be addressed. METHODS: We propose a brief survey of behavioral risk factors for enrollees of health care organizations, employer groups, or other adult populations that can be used to profile the health risk behaviors of a population, assess performance of prevention and risk reduction programs, or make comparisons with other populations. The survey contains questions about tobacco, diet, physical activity, alcohol, firearms, motor vehicle safety, sexual behavior, and drugs. RESULTS: Recommendations for survey items, implementation, and calculation of performance measures are given. CONCLUSIONS: Widespread adoption of this type of survey would be a major step forward in acknowledging the impact that behavior has on health and in furthering individual and organizational accountability for improving health risk behaviors.

Adult↗
PubMed1998

Differences in the risk of homicide and other fatal injuries between postpartum women and other women of childbearing age: implications for prevention.

OBJECTIVES: This study compared injury deaths between postpartum women and other women aged 15 to 44. METHODS: Risk ratios and 95% confidence intervals (CIs) were computed for injury fatality rates. RESULTS: Fifty percent (29/58) of postpartum injury deaths were homicides, compared with 26% (427/1648) of injury deaths among nonpregnant, nonpostpartum women. For females aged 15 to 19, the homicide rate was 2.6 times higher (95% CI = 1.17, 5.95) for postpartum females than for other females. The motor-vehicle fatality rate was lower for postpartum females than for nonpregnant, nonpostpartum females (risk ratio = 0.30, CI = 0.18, 0.48). CONCLUSIONS: Postpartum females aged 15 to 19 years were at higher risk of homicide. Postpartum women were at reduced risk of motor-vehicle fatalities.

Accidents, Traffic↗
PubMed1997

Handwashing and glove use in a long-term-care facility.

OBJECTIVES: To determine glove use and handwashing practices, the factors associated with infection control practices, and the frequency of potential microbial transmission in a long-term-care facility (LTCF). DESIGN: Observational study of 230 staff-resident interactions in an LTCF. We recorded resident characteristics, type of activity, staff credentials, and movements of the staff member's hands, then used the LTCF's guidelines to judge appropriateness of glove use and handwashing. SETTING: 255-bed, university-based LTCF in Baltimore, Maryland. PARTICIPANTS: A systematic sample of staff-resident interactions. RESULTS: Gloves were worn in 139 (82%) of 170 interactions when indicated, but changed appropriately in only 1 (16%) of 132. Hands were washed when needed before an interaction in 27%, during an interaction in 0%, and after an interaction in 63%. Gloves were less likely to be used when caring for residents with gastrostomy tubes compared with other residents (relative risk, 0.85; 95% confidence interval, 0.73-0.98). Guidelines were followed more frequently during wound care than during other activities. Microbial transmission potentially could have occurred in 158 (82%) of 193 evaluable interactions. CONCLUSIONS: We documented marked deficiencies in glove and handwashing, demonstrated the possible impact of these deficiencies, and identified factors associated with inadequate handwashing and glove use. This information can be used in future educational and research efforts to improve infection control practices.

Baltimore↗
PubMed1997

Trends in hospitalizations for abnormal uterine bleeding in the United States: 1980-1992.

We examined trends in hospital discharges, length of hospital stay, and procedures performed for abnormal uterine bleeding from 1980 through 1992. We used data from the National Hospital Discharge Survey. Discharges involving patients with reproductive tract cancers or pregnancy-related diagnoses were excluded. The overall discharge rate for abnormal uterine bleeding decreased 66% during the study period, from 56 discharges per 10,000 women in 1980 to 19 per 10,000 in 1992. The discharge rate declined significantly for hospitalizations during which hysterectomy was not performed and remained relatively stable for hospitalizations with hysterectomy. Discharge rates decreased among all age and race groups and in all geographic regions. The percentages of discharges following hysterectomy steadily increased from 25% in 1980 to 72% in 1992. The average length of stay decreased significantly only for discharges for stays during which hysterectomy was performed, from 7.6 days in 1980 to 3.7 days in 1992. During the study period, abnormal uterine bleeding contributed to more than 5 million hospitalizations, 2 million hysterectomies, and 20 million hospital days. Our findings are consistent with a decreased likelihood of hospitalization for abnormal uterine bleeding if hysterectomy was not performed and shorter hospital stays for women undergoing hysterectomy for bleeding. These findings highlight the impact of abnormal uterine bleeding on the U.S. health care system.

Adult↗
PubMed1995

Epidemic cholera in rural El Salvador: risk factors in a region covered by a cholera prevention campaign.

In response to the Latin American cholera epidemic, El Salvador began a prevention programme in April 1991. The first case was confirmed in August, and 700 cases were reported within 3 months. A matched case-control study was conducted in rural La Libertad Department in November 1991. Illness was associated with eating cold cooked or raw seafood (odds ratio [OR] = 7.0; 95% confidence limits [CL] = 1.4, 35.0) and with drinking water outside the home (OR = 8.8; 95% CL = 1.7, 44.6). Assertion of knowledge about how to prevent cholera (OR = 0.2; 95% CL = 0.1, 0.8) and eating rice (OR = 0.2; 95% CL = 0.1, 0.8) were protective. More controls than patients regularly used soap (OR = 0.3; 95% CL = 0.1, 1.0). This study demonstrated three important points for cholera prevention: (1) seafood should be eaten cooked and hot; (2) populations at risk should be taught to treat household drinking water and to avoid drinking water outside the home unless it is known to be treated; and (3) education about hygiene can be an important tool in preventing cholera.

Adolescent↗
PubMed1994

An influenza A (H1N1) virus, closely related to swine influenza virus, responsible for a fatal case of human influenza.

In July 1991, an influenza A virus, designated A/Maryland/12/91 (A/MD), was isolated from the bronchial secretions of a 27-year-old animal caretaker. He had been admitted to the hospital with bilateral pneumonia and died of acute respiratory distress syndrome 13 days later. Antigenic analyses with postinfection ferret antisera and monoclonal antibodies to recent H1 swine hemagglutinins indicated that the hemagglutinin of this virus was antigenically related to, but distinguishable from, those of other influenza A (H1N1) viruses currently circulating in swine. Oligonucleotide mapping of total viral RNAs revealed differences between A/MD and other contemporary swine viruses. However, partial sequencing of each RNA segment of A/MD demonstrated that all segments were related to those of currently circulating swine viruses. Sequence analysis of the entire hemagglutinin, nucleoprotein, and matrix genes of A/MD revealed a high level of identity with other contemporary swine viruses. Our studies on A/MD emphasize that H1N1 viruses in pigs obviously continue to cross species barriers and infect humans.

Acute Disease↗
PubMed1993

Standardized patients: a long-station clinical examination format.

Data from the first 20 periods of a long-station clinical performance examination for a 4-week required clerkship in family medicine were examined in order to assess the reliability and validity of the examination. Data from 304 students were examined for station, case scenario and examiner effects and results compared to short-station formats. A significant examiner effect was found but there were no differences in student performance for station or case scenario. These findings reflect examiner specificity cited in the literature for short station examinations, but not case specificity. The source of variability for this examination appears to be primarily examiner effect. There was a significant correlation between student scores on the two cases, and raters tended to rank order students similarly in spite of variability in mean rater score. Scores on the CPE correlated with other measures of clinical performance as well as other methods of student evaluation for the clerkship providing some evidence for construct and criterion-related validity. CPE cases were developed from clerkship objectives but examination of the test blueprint revealed some gaps in the extent to which the CPE covers the course content. CPE developers are working to increase interrater reliability through examiner training and further standardize case scenarios through check-lists and patient training. Additional cases are being developed to increase the content validity of the examination.

Clinical Clerkship↗
PubMed1993

A clinical performance assessment for a third-year required clerkship in family medicine.

BACKGROUND: In planning a new family medicine clerkship, a clinical performance examination (CPE) using focused encounters was included in the student evaluation. This format was believed to best reflect the types of experiences that students would be exposed to during the primarily ambulatory care family medicine clerkship. METHODS: Testing scenarios were representative of either the problem-based cases on which the curriculum had been developed or the 20 common problems seen in family medicine. To date, 175 students have taken the CPE, each completing two cases. RESULTS: The first year of experience indicates that there are no differences in student performance between periods and that students do not perform differently on the first case than they do on the second. No significant effect for scenarios was found. Examiner effects have been found, however. CONCLUSION: These effects suggest a need for further work in standardizing the scoring of the examination.

Clinical Clerkship↗