Kathleen N. Gillespie

Diabetes Burden and Access to Preventive Care in the Rural United States.

CONTEXT National databases can be used to investigate diabetes prevalence and health care use. Guideline-based care can reduce diabetes complications and morbidity. Yet little is known about the prevalence of diabetes and compliance with diabetes care guidelines among rural residents and whether different national databases provide similar results. PURPOSE To examine rural-urban differences in the prevalence of diabetes and compliance with guidelines, and to compare the Behavioral Risk Factor Surveillance System (BRFSS) and the Medical Expenditures Panel Survey (MEPS). METHODS Data for 2001-2002 were analyzed and compared by rural-urban status. Prevalence was calculated as simple unadjusted, weighted unadjusted, and weighted adjusted using a multivariate approach. Results from the 2 databases were compared. FINDINGS A slightly higher prevalence of diabetes among rural residents, 7.9% versus 6.0% in MEPS and 7.6% versus 6.6% in BRFSS, was found and persisted after adjustment for age, BMI, insurance coverage, and other demographic characteristics (adjusted OR 1.16 [1.02-1.31] in MEPS; 1.19 [1.01-1.20] in BRFSS). Rural persons in MEPS were less likely to receive an annual eye examination (aOR = 0.85) and a feet check (aOR = 0.89). A significantly (P < .05) smaller proportion of rural residents in BRFSS received an annual eye examination (aOR = 0.88), feet check (aOR = 0.85), or diabetes education (aOR = 0.83). Rural residents in both datasets were more likely to get a quarterly HbA1c test done. CONCLUSION Rural residents in both datasets had higher prevalence of diabetes. Though not always statistically significant, the trend was to less guideline compliance in rural areas.

Improving the public health workforce: evaluation of a training course to enhance evidence-based decision making.

An evidence-based public health (EBPH) course was developed in 1997 by the Prevention Research Center at Saint Louis University School of Public Health to train the public health workforce to enhance dissemination of EBPH in their public health practice. An on-line evaluation of the course was conducted among participants who attended the course from 2001 to 2004 to determine the impact the course had on the implementation of EBPH within their Respective public health agencies (n = 107). The majority of these individuals were program directors, managers, or coordinators working in state health departments. Results from the evaluation Revealed that 90 percent of participants indicated that the course helped them make more informed decisions in the workplace. Respondents identified improvement in their ability to communicate with their coworkers and Read Reports. When asked to identify potential barriers, participants specified that time constraints were the biggest impediment to using EBPH skills in the workplace. These data suggest the importance of professional training opportunities in EBPH for public health practitioners. Future endeavors should focus on overcoming the barriers to the dissemination of EBPH.

A cost-benefit analysis of gown use in controlling vancomycin-resistant Enterococcus transmission: Is it worth the price?

OBJECTIVE To determine the net benefit and costs associated with gown use in preventing transmission of vancomycin-resistant Enterococcus (VRE). DESIGN A cost-benefit analysis measuring the net benefit of gowns was performed. Benefits, defined as averted costs from reduced VRE colonization and infection, were estimated using a matched cohort study. Data sources included a step-down cost allocation system, hospital informatics, and microbiology databases. SETTING The medical intensive care unit (MICU) at Barnes-Jewish Hospital, St. Louis, Missouri. PATIENTS Patients admitted to the MICU for more than 24 hours from July 1, 1997, to December 31, 1999. INTERVENTIONS Alternating periods when all healthcare workers and visitors were required to wear gowns and gloves versus gloves alone on entry to the rooms of patients colonized or infected with VRE. RESULTS On base-case analysis, 58 VRE cases were averted with gown use during 18 months. The annual net benefit of the gown policy was dollar 419,346 and the cost per case averted of VRE was dollar 1,897. The analysis was most sensitive to the level of VRE transmission. CONCLUSIONS Infection control policies (eg, gown use) initially increase the cost of health services delivery. However, such policies can be cost saving by averting nosocomial infections and the associated costs of treatment. The cost savings to the hospital plus the benefits to patients and their families of avoiding nosocomial infections make effective infection control policies a good investment.

Accumulation of 3,4-dihydroxyphenylglycolaldehyde, the neurotoxic monoamine oxidase A metabolite of norepinephrine, in locus ceruleus cell bodies in Alzheimer's disease : Mechanism of neuron death

3,4-Dihydroxyphenylglycolaldehyde (DOPEGAL) is the neurotoxic monoamine oxidase A (MAO-A) metabolite of norepinephrine (NE). NE neurons in the locus ceruleus (LC) die in Alzheimers disease (AD). To determine if DOPEGAL could contribute to NE neuron death in AD we measured levels of DOPEGAL, NE and their synthesizing enzymes in LC from AD and matched controls. We found 2.8- and 3.6-fold increases in DOPEGAL and MAO-A in AD LC neuronal cell bodies compared to controls. NE and dopamine beta-hydroxylase were increased by 3.8- and 10.7-fold, respectively. Implications for the mechanism of neuron death in AD are discussed.

Surveillance for vancomycin-resistant enterococci: Type, rates, costs, and implications

OBJECTIVE To evaluate 2 active surveillance strategies for detection of enteric vancomycin-resistant enterococci (VRE) in an intensive care unit (ICU). DESIGN Thirty-month prospective observational study. SETTING ICU at a university-affiliated referral center. PATIENTS All patients with an ICU stay of 24 hours or more were eligible for the study. INTERVENTION Clinical active surveillance (CAS), involving culture of a rectal swab specimen for detection of VRE, was performed on admission, weekly while the patient was in the ICU, and at discharge. Laboratory-based active surveillance (LAS), involving culture of a stool specimen for detection of VRE, was performed on stool samples submitted for Clostridium difficile toxin detection. RESULTS Enteric colonization with VRE was detected in 309 (17%) of 1,872 patients. The CAS method initially detected 280 (91%) of the 309 patients colonized with VRE, compared with 25 patients (8%) detected by LAS; colonization in 4 patients (1%) was initially detected by analysis of other clinical specimens. Most patients with colonization (76%) would have gone undetected by LAS alone, whereas use of the CAS method exclusively would have missed only 3 patients (1%) who were colonized. CAS cost Dollars 1,913 per month, or Dollars 57,395 for the 30-month study period. Cost savings of CAS from preventing cases of VRE colonization and bacteremia were estimated to range from Dollars 56,258 to Dollars 303,334 per month. CONCLUSIONS A patient-based CAS strategy for detection of enteric colonization with VRE was superior to LAS. In this high-risk setting, CAS appeared to be the most efficient and cost-effective surveillance method. The modest costs of CAS were offset by the averted costs associated with the prevention of VRE colonization and bacteremia.

Degenerative changes in epinephrine tonic vasomotor neurons in Alzheimer's disease

The C-1 region in the rostral ventral lateral medulla contains mainly epinephrine (Epi) neurons. These neurons are the tonic vasomotor center of the brain. We previously demonstrated changes in the enzymatic activity of phenylethanolamine N-methyltransferase (PNMT) in axon terminals and cell bodies of Epi neurons from the medulla of Alzheimers disease (AD) brains. In this study, we investigated the perikarya of C-1 neurons for the morphometric, immunohistochemical and histochemical changes that are seen in severely affected regions of Alzheimer brain. The mean areas and size distributions of C-1 neurons from 6 AD and 6 neurologically normal patients were compared using the Wilcoxon rank sum test and Kolmogorov-Smirnov z tests respectively. Additional brain sections from the C-1 region of AD and control individuals were stained with cresyl violet or immunostained with antibodies to the lysosomal hydrolase cathepsin D, Tau-2, Alz-50 and beta-amyloid protein. The average area of C-1 neurons in AD brains was decreased 18.3% (P < 0.001) compared to the areas of the same cell population in age-matched control brains. A shift toward smaller sized C-1 neurons was seen in the AD cases. Nissl stain demonstrated a central chromatolytic appearance in 3.7% of AD neurons sampled. No beta-amyloid deposits were detected histologically or immunocytochemically in the C-1 region of AD brains. Both Tau-2 and Alz-50 immunoreactivity was observed in occasional (1%) C-1 neurons from AD brains but not in controls. A small proportion (30%) of the C-1 neurons showing atrophy displayed increased cathepsin D immunoreactivity.(ABSTRACT TRUNCATED AT 250 WORDS)

Female veterans' use of health care services.

The number of female veterans has more than doubled in the last 15 years, and this growth is expected to continue. This study examines the current utilization of both overall and Veterans Administration (VA) health care services by female veterans. Current utilization is studied as a set of contact decisions: whether or not to utilize any inpatient, VA inpatient, any outpatient, and VA outpatient services. Probit regression is used to estimate these dichotomous choices. Results indicate that health status and some demographic variables are significantly related to the use of all four types of care. In addition, use of other VA benefits, the absence of private insurance coverage, and low income are predictors of use of the VA.

COST-EFFECTIVENESS OF ADJUNCTIVE HYPERBARIC OXYGEN IN THE TREATMENT OF DIABETIC ULCERS

OBJECTIVES This study estimates the cost-effectiveness (CE) of the adjunctive use of hyperbaric oxygen (HBO2) therapy in the treatment of diabetic ulcers based on the payers and societal perspectives. METHODS The study population was a hypothetical cohort of 1,000 patients sixty years of age with severe diabetic foot ulcers. A decision tree model was constructed to estimate the CE of HBO2 therapy in the treatment of diabetic ulcers at years 1, 5, and 12. Scenario and one-way sensitivity analyses were also undertaken to identify parameters that may significantly influence the estimates. RESULTS The CE model estimated that the incremental cost per additional quality-adjusted life year (QALY) gained at years 1, 5, and 12, was dollar 27,310, dollar 5,166, and dollar 2,255, respectively. CONCLUSIONS The study results indicate that HBO2 therapy in the treatment of diabetic ulcers is cost-effective, particularly based on a long-term perspective. However, the results are limited by the clinical studies that provide the basis of the CE estimation.

Evidence for Decreased Transport of PNMT Protein in Advanced Alzheimer's Disease

Phenylethanolamine N‐methyltransferase (PNMT) is the rate‐limiting enzyme in the synthesis of epinephrine and a specific marker for adrenergic neurons. PNMT protein is decreased in axon terminals in brains from patients with Alzheimers disease due to retrograde degeneration of epinephrine neurons. To determine the subcellular mechanism underlying retrograde degeneration, the distribution of PNMT between axon terminal and cell body was calculated in early and advanced Alzheimer cases compared with age‐matched controls. In early Alzheimers disease there is a decrease in PNMT in axon terminals and in total PNMT in epinephrine cell bodies and terminals compared with control values. There is no difference in the ratio of PNMT in cell body/axon terminal compared with controls. In contrast, in advanced Alzheimers disease, PNMT activity increases by 124% in epinephrine neuronal cell bodies compared with controls. Immunochemical titration shows that this increased enzyme activity is due to an increase in PNMT protein. The cell body/axon terminal ratio of PNMT is increased 2.5‐fold in advanced Alzheimers disease compared with controls. These findings are consistent with the hypothesis that in early Alzheimers disease there is a decreased synthesis or increased degradation of PNMT. However, in advanced Alzheimers disease we propose that the accumulation of this enzyme in the perikarya results from a diminished transport of PNMT to axon terminals. We further postulate that epinephrine, the product of PNMT, and its further metabolites are endogenous neurotoxins. Therefore, the accumulation of PNMT in epinephrine cell bodies may contribute to the degeneration of these neurons in Alzheimers disease.

Occurrence of cancer in Alzheimer and elderly control patients: an epidemiologic necropsy study.

SummaryEpidemiologic necropsy provides an accurate measure of the occurrence rates of diseases. To determine the occurrence of cancer in Alzheimer patients as well as in non-Alzheimer elderly controls, we examined autopsy reports of 575 control and 71 Alzheimer cases aged 50–100 years for histologic evidence of cancer. We compared expected rates of cancers calculated from the National Cancer Institutes Surveillance, Epidemiology and End Result (SEER) Program data to rates observed at autopsy using a chi-squared test. To determine whether there was an association between the occurrence of cancer and Alzheimer disease, we compared rates for all cancer and three specific cancers in Alzheimer and control patients using an odds ratio test. We found from fourfold to 98-fold more cancer in Alzheimer patients and controls than that expected from SEER data. There was no statistical difference in the autopsy incidence of total, lung, or prostate cancer between Alzheimer patients and controls. However, the occurrence of pancreatic cancer was 6.7-fold higher in Alzheimer patients than in control subjects. Controlling for multiple comparisons, the odds ratio for pancreatic cancer in Alzheimers disease was significantly higher than in controls (p < 0.001). Our results indicate that cancer occurs more frequently than expected in both Alzheimer patients and control subjects. In addition, there may be an association between the occurrence of certain cancers and Alzheimers disease.