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1.
J Womens Health (Larchmt) ; 33(6): 774-777, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38501329

ABSTRACT

Background: Retail health clinics offer easy access and lower costs in seeking nonemergent and usually focused care. The objective of this observational study was to describe the use of retail clinic services by women at MinuteClinic at CVS, the largest network of retail clinics in the United States. Methods: The retail clinic's large database included complete national data for every in-person encounter as recorded on the same electronic health record. Virtual care and pharmacist-delivered services like COVID-19 testing were excluded from the analysis. The primary reason for the visit and the patient's age group (<15, 15-44, 45-64, ≥65 years) and self-reported sex were recorded at each encounter from the most recent 5 years (January 1, 2018, to December 31, 2022). Results: There were 17,969,483 encounters by women seeking care, and women ≥15 years old were more likely than men to attend the clinics. Half of all encounters (50.6%) were for non-gynecologic acute care, whereas one-third (33.6%) dealt with either an infection or the need for a vaccination. Gynecologic reasons involved 5.6% of all encounters in women ≥15 years of age. No obstetrical care was provided except for pregnancy testing with referral, acute non-obstetric needs, or guideline-recommended vaccinations. Conclusion: Women, especially of reproductive age, are more inclined than men to seek care at retail clinics. Acute care is the most common need, although requests for immunizations, infection screening and treatment, and reproductive health issues occurred often.


Subject(s)
Ambulatory Care Facilities , Health Services Accessibility , Humans , Female , Adult , Middle Aged , United States , Adolescent , Health Services Accessibility/statistics & numerical data , Ambulatory Care Facilities/statistics & numerical data , Young Adult , Aged , COVID-19/epidemiology , COVID-19/prevention & control , Male
2.
Chem Sci ; 11(17): 4391-4396, 2020 Apr 09.
Article in English | MEDLINE | ID: mdl-34122896

ABSTRACT

J-dimer emission is an emergent property that occurs when pairs of ground state fluorophores associate, typically in a dilute solution medium. The resulting fluorescence is shifted with respect to the monomer. J-dimer emission, however, has never been observed in concentrated dispersions or in the solid state. We posited that multivariate (MTV) MOFs with double interwoven structures would help to isolate these dimers within their crystalline matrix. Using this strategy, J-aggregate density was controlled during crystallization by following a substitutional solid solution approach. Here, we identified the presence of J-dimers over the entire composition range for interwoven PIZOF-2/NNU-28 structures with variable amounts of a diethynyl-anthracene aggregate-forming link. We produced bulk crystals that systematically shifted their fluorescence from green to red with lifetimes (up to 13 ns) and quantum yields (up to 76%) characteristic of π-π stacked aggregates. Photophysical studies also revealed an equilibrium constant of dimerization, K D = 1.5 ± 0.3 M-1, enabling the first thermodynamic quantification of link-link interactions that occur during MOF assembly. Our findings elucidate the role that supramolecular effects play during crystallization of MTV MOFs, opening pathways for the preparation of solid-state materials with solution-like properties by design.

3.
J Am Chem Soc ; 141(51): 19978-19982, 2019 Dec 26.
Article in English | MEDLINE | ID: mdl-31789028

ABSTRACT

Systematically tuning the conductivity of metal-organic frameworks (MOFs) is key to synergizing their attractive synthetic control and porosity with electrochemical attributes useful in energy and sensing technologies. A priori control of charge transfer is possible by exploiting the solid-solution properties of MOFs together with electronic self-exchange enabled by redox pendants. Here we introduce a new strategy for preparing redox-active MOF thin-film electrodes with finely tuned redox pendant content. Varying the ratios of alkyl-ferrocene containing redox-active and inactive links during MOF synthesis enabled the fabrication of electrodes with tunable redox conductivity. The prepared MOF electrodes display maximum electron conductivity of 1.10 mS m-1, with crystallographic and electrochemical stability upon thousands of redox cycles. Electroanalytical studies demonstrated that the conductivity follows solution-like diffusion-controlled behavior with nonlinear electron diffusion coefficients consistent with charge hopping and percolation models of spatially fixed redox centers. Our studies create new prospects in the design and synthesis of redox-active MOFs with targeted properties for the design of advanced electrochemical devices.

4.
J Org Chem ; 83(15): 8036-8053, 2018 08 03.
Article in English | MEDLINE | ID: mdl-29786432

ABSTRACT

A library of 12 dibenzo- and naphtho-fluoranthene polycyclic aromatic hydrocarbons (PAHs) with MW = 302 (C24H14) was synthesized via a Pd-catalyzed fluoranthene ring-closing reaction. By understanding the various modes by which the palladium migrates during the transformation, structural rearrangements were bypassed, obtaining pure PAHs in high yields. Spectroscopic and electrochemical characterization demonstrated the profound diversity in the electronic structures between isomers. Highlighting the significant differences in emission of visible light, this library of PAHs will enable their standardization for toxicological assessment and potential use as optoelectronic materials.

5.
Toxicol Pathol ; 44(8): 1072-1083, 2016 12.
Article in English | MEDLINE | ID: mdl-27638646

ABSTRACT

There is a great need for improved diagnostic and prognostic accuracy of potential cardiac toxicity in drug development. This study reports the evaluation of several commercially available biomarker kits by 3 institutions (SRI, Eli Lilly, and Pfizer) for the discrimination between myocardial degeneration/necrosis and cardiac hypertrophy as well as the assessment of the interlaboratory and interplatform variation in results. Serum concentrations of natriuretic peptides (N-terminal pro-atrial natriuretic peptide [NT-proANP] and N-terminal pro-brain natriuretic peptide [NT-proBNP]), cardiac and skeletal troponins (cTnI, cTnT, and sTnI), myosin light chain 3 (Myl3), and fatty acid binding protein 3 (FABP3) were assessed in rats treated with minoxidil (MNX) and isoproterenol (ISO). MNX caused increased heart-to-body weight ratios and prominent elevations in NT-proANP and NT-proBNP concentrations detected at 24-hr postdose without elevation in troponins, Myl3, or FABP3 and with no abnormal histopathological findings. ISO caused ventricular leukocyte infiltration, myocyte fibrosis, and necrosis with increased concentrations of the natriuretic peptides, cardiac troponins, and Myl3. These results reinforce the advantages of a multimarker strategy in elucidating the underlying cause of cardiac insult and detecting myocardial tissue damage at 24-hr posttreatment. The interlaboratory and interplatform comparison analyses also showed that the data obtained from different laboratories and platforms are highly correlated and reproducible, making these biomarkers widely applicable in preclinical studies.


Subject(s)
Biomarkers/blood , Drug Discovery/standards , Drug-Related Side Effects and Adverse Reactions/blood , Heart/drug effects , Laboratories/standards , Animals , Cardiotoxicity , Drug Evaluation, Preclinical , Myocardium/metabolism , Myocardium/pathology , Rats
6.
Radiat Res ; 185(5): 449-60, 2016 05.
Article in English | MEDLINE | ID: mdl-27092765

ABSTRACT

Increased cancer risk remains a primary concern for travel into deep space and may preclude manned missions to Mars due to large uncertainties that currently exist in estimating cancer risk from the spectrum of radiations found in space with the very limited available human epidemiological radiation-induced cancer data. Existing data on human risk of cancer from X-ray and gamma-ray exposure must be scaled to the many types and fluences of radiations found in space using radiation quality factors and dose-rate modification factors, and assuming linearity of response since the shapes of the dose responses at low doses below 100 mSv are unknown. The goal of this work was to reduce uncertainties in the relative biological effect (RBE) and linear energy transfer (LET) relationship for space-relevant doses of charged-particle radiation-induced carcinogenesis. The historical data from the studies of Fry et al. and Alpen et al. for Harderian gland (HG) tumors in the female CB6F1 strain of mouse represent the most complete set of experimental observations, including dose dependence, available on a specific radiation-induced tumor in an experimental animal using heavy ion beams that are found in the cosmic radiation spectrum. However, these data lack complete information on low-dose responses below 0.1 Gy, and for chronic low-dose-rate exposures, and there are gaps in the LET region between 25 and 190 keV/µm. In this study, we used the historical HG tumorigenesis data as reference, and obtained HG tumor data for 260 MeV/u silicon (LET ∼70 keV/µm) and 1,000 MeV/u titanium (LET ∼100 keV/µm) to fill existing gaps of data in this LET range to improve our understanding of the dose-response curve at low doses, to test for deviations from linearity and to provide RBE estimates. Animals were also exposed to five daily fractions of 0.026 or 0.052 Gy of 1,000 MeV/u titanium ions to simulate chronic exposure, and HG tumorigenesis from this fractionated study were compared to the results from single 0.13 or 0.26 Gy acute titanium exposures. Theoretical modeling of the data show that a nontargeted effect model provides a better fit than the targeted effect model, providing important information at space-relevant doses of heavy ions.


Subject(s)
Carcinogenesis/radiation effects , Harderian Gland/pathology , Harderian Gland/radiation effects , Linear Energy Transfer/radiation effects , Radiation Dosage , Animals , Extraterrestrial Environment , Female , Male , Mice , Relative Biological Effectiveness , Uncertainty
7.
Am J Manag Care ; 19(6): e225-32, 2013 Jun 01.
Article in English | MEDLINE | ID: mdl-23844751

ABSTRACT

BACKGROUND: With the impetus for healthcare reform and the imperative for healthcare organizations to improve efficiency and reduce waste, it is valuable to examine high-volume procedures and practices in order to identify potential overuse. At the same time, organizations must ensure that improved efficiency does not inadvertently reduce patient safety. METHODS: We undertook a multicenter analysis of the use of adult cardiac telemetry outside of the intensive care unit or step-down units at 4 teaching hospitals to determine the percentage of monitoring days that were not justified by an accepted indication and the monetary costs associated with these nonindicated days. We also assessed the safety of eliminating monitoring on days when it was not justified by looking at the incidence of arrhythmias. RESULTS: We found that in 35% of telemetry days, telemetry use was not supported by an accepted set of clinical indications. The incidence of arrhythmias on nonindicated days was low (3.1 per 100 days of monitoring per nonindicated day),and the arrhythmias detected were clinically insignificant. Eliminating monitoring on nonindicated days could save a minimum of $53 per patient per day. The average 400-bed hospital with a conservative estimate of 5000 nonindicated patientdays per year could save $250,000 per year. CONCLUSION: Reducing the use of telemetry on nonindicated days may provide an opportunity for institutions to safely reduce cost as well as staff time and effort, while maintaining and potentially increasing patient safety.


Subject(s)
Arrhythmias, Cardiac/epidemiology , Health Care Costs , Patient Safety , Telemetry/economics , Telemetry/statistics & numerical data , Unnecessary Procedures/economics , Arrhythmias, Cardiac/physiopathology , Cost Control , Efficiency , Hospitals, Teaching , Humans , Incidence , Massachusetts/epidemiology , Retrospective Studies , Unnecessary Procedures/statistics & numerical data
8.
J Surg Educ ; 69(1): 41-6, 2012.
Article in English | MEDLINE | ID: mdl-22208831

ABSTRACT

OBJECTIVE: To measure universal protocol compliance through real-time, clandestine observation by medical students compared with chart audit reviews, and to enable medical students the opportunity to become conscious of the importance of medical errors and safety initiatives. DESIGN: With endorsement from Tufts Medical Center's (TMC's) Chief Medical Officer and Surgeon-in-Chief, 8 medical students performed clandestine observation audits of 98 cases from April to August 2009. A compliance checklist was based on TMC's presurgical checklist. Our initial results led to interventions to improve our universal protocol procedures, including modifications to the operating room white board and presurgical checklist, and specific feedback to surgical departments. One year later, 6 medical students performed observations of 100 cases from June to August 2010. SETTING: Tufts Medical Center, Boston, Massachusetts, which is an academic medical center and the principal teaching hospital for Tufts University School of Medicine. PARTICIPANTS: An operating room coordinator placed the medical students into 1 of our 25 operating rooms with students entering under the premise of observing the anesthesiologist for clinical education. The observations were performed Monday to Friday between 7 am and 4 pm. Although observations were not randomized, no single service or type of surgery was targeted for observation. RESULTS: A broad range of departments was observed. In 8.2% of cases, the surgical site was unmarked. A Time Out occurred in 89.7% of cases. The entire surgical team was attentive during the time out in 82% of cases. The presurgical checklist was incomplete before incision in 13 cases. Images were displayed in 82% of cases. The operating room "white board" was filled out completely in 49% of cases. Team introductions occurred in 13 cases. One year later, compliance increased in all Universal Protocol dimensions. CONCLUSIONS: Direct, real-time observation by medical students provides an accurate and granular assessment of compliance with specific components of the universal protocol and engages medical students in the quality improvement process, raises their awareness of the gravity of medical errors, and ensures appreciation of the importance of quality and safety initiatives.


Subject(s)
Clinical Competence/standards , Clinical Protocols/standards , General Surgery/education , Guideline Adherence/statistics & numerical data , Students, Medical , Surgical Procedures, Operative/education , Surgical Procedures, Operative/standards , Humans , Medical Audit/methods
9.
Toxicol Sci ; 124(2): 487-501, 2011 Dec.
Article in English | MEDLINE | ID: mdl-21920950

ABSTRACT

Pentamethyl-6-chromanol (PMCol), a chromanol-type compound related to vitamin E, was proposed as an anticancer agent with activity against androgen-dependent cancers. In repeat dose-toxicity studies in rats and dogs, PMCol caused hepatotoxicity, nephrotoxicity, and hematological effects. The objectives of this study were to determine the mechanisms of the observed toxicity and identify sensitive early markers of target organ injury by integrating classical toxicology, toxicogenomics, and metabolomic approaches. PMCol was administered orally to male Sprague-Dawley rats at 200 and 2000 mg/kg daily for 7 or 28 days. Changes in clinical chemistry included elevated alanine aminotransferase, total bilirubin, cholesterol and triglycerides-indicative of liver toxicity that was confirmed by microscopic findings (periportal hepatocellular hydropic degeneration and cytomegaly) in treated rats. Metabolomic evaluations of liver revealed time- and dose-dependent changes, including depletion of total glutathione and glutathione conjugates, decreased methionine, and increased S-adenosylhomocysteine, cysteine, and cystine. PMCol treatment also decreased cofactor levels, namely, FAD and increased NAD(P)+. Microarray analysis of liver found that differentially expressed genes were enriched in the glutathione and cytochrome P450 pathways by PMCol treatment. Reverse transcription-polymerase chain reaction of six upregulated genes and one downregulated gene confirmed the microarray results. In conclusion, the use of metabolomics and toxicogenomics demonstrates that chronic exposure to high doses of PMCol induces liver damage and dysfunction, probably due to both direct inhibition of glutathione synthesis and modification of drug metabolism pathways. Depletion of glutathione due to PMCol exposure ultimately results in a maladaptive response, increasing the consumption of hepatic dietary antioxidants and resulting in elevated reactive oxygen species levels associated with hepatocellular damage and deficits in liver function.


Subject(s)
Chemical and Drug Induced Liver Injury , Chromans/toxicity , Liver/drug effects , Animals , Biomarkers/blood , Biomarkers/urine , Chemical and Drug Induced Liver Injury/genetics , Chemical and Drug Induced Liver Injury/metabolism , Chemical and Drug Induced Liver Injury/pathology , Chromans/blood , Chromans/urine , Gene Expression/drug effects , Gene Expression Profiling , Kidney/drug effects , Kidney/metabolism , Kidney/pathology , Liver/metabolism , Liver/pathology , Male , Metabolomics , Molecular Structure , Oligonucleotide Array Sequence Analysis , Organ Size/drug effects , Rats , Rats, Sprague-Dawley , Real-Time Polymerase Chain Reaction , Toxicogenetics
10.
Jt Comm J Qual Patient Saf ; 37(1): 3-10, 2011 Jan.
Article in English | MEDLINE | ID: mdl-21306060

ABSTRACT

BACKGROUND: Prevention of health care-associated infections starts with scrupulous hand hygiene (HH). Improving HH compliance is a major target for the World Health Organization Patient Safety Challenge and is one of The Joint Commission's National Patient Safety Goals. Yet, adherence to HH protocols is generally poor for health care professionals, despite interventions designed to improve compliance. At Tufts Medical Center (Boston), HH compliance rates were consistently low despite the presence of a traditional HH campaign that used communication and education. METHODS: A comprehensive program incorporated strong commitment by hospital leadership-who were actively involved in responsibilities previously only performed by infection preventionists and quality and patient safety staff-dedication of financial resources, including securing a grant; collaborating with a private advertising firm in a marketing campaign; and employing a multifaceted approach to education, observation, and feedback. RESULTS: This campaign resulted in a rapid and sustained improvement in HH compliance: Compared with the mean HH compliance rate for the six months before the campaign (72%), postcampaign HH compliance (mean = 94%) was significantly greater (p < .0001). Factors contributing to the success of the campaign included the development of the marketing campaign to fit this academic medical center's particular culture, strong support from the medical center leadership, a multifaceted educational approach, and monthly feedback on HH compliance. CONCLUSIONS: A comprehensive campaign resulted in rapid and sustained improvement in HH compliance at an academic medical center after traditional communication and education strategies failed to improve HH performance.


Subject(s)
Guideline Adherence/organization & administration , Hand Disinfection/methods , Inservice Training/organization & administration , Practice Guidelines as Topic , Academic Medical Centers , Hospital Bed Capacity, 300 to 499 , Humans , Program Evaluation
11.
Acad Med ; 85(6): 959-64, 2010 Jun.
Article in English | MEDLINE | ID: mdl-20505394

ABSTRACT

Retainer-medicine primary care practices, commonly referred to as "luxury" or "concierge" practices, provide enhanced services to patients beyond those available in traditional practices for a yearly retainer fee. Adoption of retainer practices has been largely absent in academic health centers (AHCs). Reasons for this trend stem primarily from ethical concerns, such as the potential for patient abandonment when physicians downsize from larger, traditional practices to smaller, retainer-medicine practices.In 2004, the Department of Medicine at Tufts Medical Center developed an academic retainer-medicine primary care practice within the Division of General Medicine that not only generates financial support for the division but also incorporates a clinical and business model that is aligned with the mission and ethics of an academic institution.In contrast to private retainer-medicine practices, this unique business model addresses several of the ethical issues associated with traditional retainer practices-it does not restrict net access to care and it neutralizes concerns about patient abandonment. Addressing the growing primary care shortage, the model also presents the opportunity for a retainer practice to cross-subsidize the expansion of general medicine in an academic medical setting. The authors elucidate the benefits, as well as the inherent challenges, of embedding an academic retainer-medicine practice within an AHC.


Subject(s)
Primary Health Care/economics , Schools, Medical/economics , Ethics, Medical , Massachusetts , Models, Economic , Physician's Role , Primary Health Care/statistics & numerical data
12.
Toxicol Sci ; 107(1): 258-69, 2009 Jan.
Article in English | MEDLINE | ID: mdl-18930951

ABSTRACT

Vancomycin, one of few effective treatments against methicillin-resistant Staphylococcus aureus, is nephrotoxic. The goals of this study were to (1) gain insights into molecular mechanisms of nephrotoxicity at the genomic level, (2) evaluate gene markers of vancomycin-induced kidney injury, and (3) compare gene expression responses after iv and ip administration. Groups of six female BALB/c mice were treated with seven daily iv or ip doses of vancomycin (50, 200, and 400 mg/kg) or saline, and sacrificed on day 8. Clinical chemistry and histopathology demonstrated kidney injury at 400 mg/kg only. Hierarchical clustering analysis revealed that kidney gene expression profiles of all mice treated at 400 mg/kg clustered with those of mice administered 200 mg/kg iv. Transcriptional profiling might thus be more sensitive than current clinical markers for detecting kidney damage, though the profiles can differ with the route of administration. Analysis of transcripts whose expression was changed by at least twofold compared with vehicle saline after high iv and ip doses of vancomycin suggested the possibility of oxidative stress and mitochondrial damage in vancomycin-induced toxicity. In addition, our data showed changes in expression of several transcripts from the complement and inflammatory pathways. Such expression changes were confirmed by relative real-time reverse transcription-polymerase chain reaction. Finally, our results further substantiate the use of gene markers of kidney toxicity such as KIM-1/Havcr1, as indicators of renal injury.


Subject(s)
Anti-Bacterial Agents/toxicity , Biomarkers/metabolism , Kidney Diseases/chemically induced , Kidney Diseases/metabolism , Vancomycin/toxicity , Alkaline Phosphatase/analysis , Analysis of Variance , Animals , Anti-Bacterial Agents/administration & dosage , Blood Urea Nitrogen , Cluster Analysis , Female , Gene Expression/drug effects , Inflammation/metabolism , Injections, Intraperitoneal , Injections, Intravenous , Kidney/chemistry , Kidney/pathology , Mice , Mice, Inbred BALB C , Oligonucleotide Array Sequence Analysis , Oxidative Stress/drug effects , Signal Transduction/drug effects , Vancomycin/administration & dosage , gamma-Glutamyltransferase/analysis
13.
Patient ; 2(2): 95-103, 2009 Jun 01.
Article in English | MEDLINE | ID: mdl-22273085

ABSTRACT

BACKGROUND: Concierge medical practice is a relatively new and somewhat controversial development in primary-care practice. These practices promise patients more personalized care and dedicated service, in exchange for an annual membership fee paid by patients. The experiences of patients using these practices remain largely undocumented. OBJECTIVE: To assess the experiences of patients in a concierge medicine practice compared with those in a general medicine practice. METHODS: Stratified random samples of patients empanelled to each of the four doctors who practice at both a general medicine and a concierge medicine practice separately situated at an academic medical center were drawn. Patients were eligible for the study if they had a visit with the physician between January and May 2006. The study questionnaire (Consumer Assessment of Healthcare Providers and Systems Clinician and Group Survey, supplemented with items from the Ambulatory Care Experiences Survey) was administered by mail to 100 general medicine patients per physician (n = 400) and all eligible concierge medicine patients (n = 201). Patients who completed the survey and affirmed the study physician as their primary-care physician formed the analytic sample (n = 344) that was used to compare the experiences of concierge medicine and general medicine patients. Models controlled for respondent characteristics and accounted for patient clustering within physicians using physician fixed effects. RESULTS: Patients' experiences with organizational features of care, comprising care co-ordination (p < 0.01), access to care (p < 0.001) and interactions with office staff (p < 0.001), favored concierge medicine over general medicine practice. The quality of physician-patient interactions did not differ significantly between the two groups. However, the patients of the concierge medicine practice were more likely to report that their physician spends sufficient time in clinical encounters than patients of the general medicine practice (p < 0.003). CONCLUSION: The results suggest patients of the concierge medicine practice experienced and reported enhanced service, greater access to care, and better care co-ordination than those of the general medicine practice. This suggests that further study to understand the etiology of these differences may be beneficial in enhancing patients' experience in traditional primary-care practices.

14.
J Gen Intern Med ; 23(4): 429-41, 2008 Apr.
Article in English | MEDLINE | ID: mdl-18373141

ABSTRACT

BACKGROUND: We conducted a cluster randomized controlled trial to examine the effectiveness of computerized decision support (CDS) designed to improve hypertension care and outcomes in a racially diverse sample of primary care patients. METHODS: We randomized 2,027 adult patients receiving hypertension care in 14 primary care practices to either 18 months of their physicians receiving CDS for each hypertensive patient or to usual care without computerized support for the control group. We assessed prescribing of guideline-recommended drug therapy and levels of blood pressure control for patients in each group and examined if the effects of the intervention differed by patients' race/ethnicity using interaction terms. MEASUREMENTS AND MAIN RESULTS: Rates of blood pressure control were 42% at baseline and 46% at the outcome visit with no significant differences between groups. After adjustment for patients' demographic and clinical characteristics, number of prior visits, and levels of baseline blood pressure control, there were no differences between intervention groups in the odds of outcome blood pressure control. The use of CDS to providers significantly improved Joint National Committee (JNC) guideline adherent medication prescribing compared to usual care (7% versus 5%, P < 0.001); the effects of the intervention remained after multivariable adjustment (odds ratio [OR] 1.39 [CI, 1.13-1.72]) and the effects of the intervention did not differ by patients' race and ethnicity. CONCLUSIONS: CDS improved appropriate medication prescribing with no improvement in disparities in care and overall blood pressure control. Future work focusing on improvement of these interventions and the study of other practical interventions to reduce disparities in hypertension-related outcomes is needed.


Subject(s)
Antihypertensive Agents/therapeutic use , Blood Pressure/drug effects , Decision Support Systems, Clinical , Healthcare Disparities , Hypertension/drug therapy , Practice Patterns, Physicians'/statistics & numerical data , Academic Medical Centers , Black or African American , Aged , Antihypertensive Agents/classification , Community Health Centers , Female , Hispanic or Latino , Hospitals, Group Practice , Humans , Hypertension/ethnology , Male , Middle Aged , Primary Health Care , White People
16.
Genomics ; 86(6): 657-67, 2005 Dec.
Article in English | MEDLINE | ID: mdl-16102935

ABSTRACT

The purpose of this study was to evaluate gene expression profiles in the liver and blood for prediction of infection severity from Listeria monocytogenes (LM). Mice were injected with medium broth (control) or a nonlethal or lethal dose of LM and sacrificed 6 h later. Gene expression changes were determined using Affymetrix MGU74Av2 GeneChips and confirmed by real-time polymerase chain reaction analysis. We identified discernable genes whose gene expression profiles can be used in pattern recognition to predict and classify samples in differently treated groups, with >or=90% accuracy in liver samples and 80% accuracy in blood at prediction; however, different genes were predictive in each tissue. Our results suggest that gene expression profiling in response to LM in mice may be able to distinguish samples in groups with varying severity of infection and provide information in finding molecular mechanisms and early biomarkers for subsequent conventional clinical endpoints.


Subject(s)
Gene Expression Profiling , Genes/genetics , Listeria monocytogenes , Listeriosis/blood , Listeriosis/metabolism , Alanine Transaminase/blood , Analysis of Variance , Animals , Aspartate Aminotransferases/blood , Cluster Analysis , DNA Primers , Female , Listeriosis/pathology , Liver/metabolism , Liver/pathology , Mice , Mice, Inbred BALB C , Oligonucleotide Array Sequence Analysis , Reverse Transcriptase Polymerase Chain Reaction
17.
J Am Med Inform Assoc ; 12(4): 431-7, 2005.
Article in English | MEDLINE | ID: mdl-15802479

ABSTRACT

OBJECTIVE: The aim of this study was to evaluate the impact of an integrated patient-specific electronic clinical reminder system on diabetes and coronary artery disease (CAD) care and to assess physician attitudes toward this reminder system. DESIGN: We enrolled 194 primary care physicians caring for 4549 patients with diabetes and 2199 patients with CAD at 20 ambulatory clinics. Clinics were randomized so that physicians received either evidence-based electronic reminders within their patients' electronic medical record or usual care. There were five reminders for diabetes care and four reminders for CAD care. MEASUREMENTS: The primary outcome was receipt of recommended care for diabetes and CAD. We created a summary outcome to assess the odds of increased compliance with overall diabetes care (based on five measures) and overall CAD care (based on four measures). We surveyed physicians to assess attitudes toward the reminder system. RESULTS: Baseline adherence rates to all quality measures were low. While electronic reminders increased the odds of recommended diabetes care (odds ratio [OR] 1.30, 95% confidence interval [CI] 1.01-1.67) and CAD (OR 1.25, 95% CI 1.01-1.55), the impact of individual reminders was variable. A total of three of nine reminders effectively increased rates of recommended care for diabetes or CAD. The majority of physicians (76%) thought that reminders improved quality of care. CONCLUSION: An integrated electronic reminder system resulted in variable improvement in care for diabetes and CAD. These improvements were often limited and quality gaps persist.


Subject(s)
Attitude of Health Personnel , Coronary Artery Disease/therapy , Diabetes Mellitus/therapy , Guideline Adherence , Medical Records Systems, Computerized , Quality of Health Care , Reminder Systems , Algorithms , Attitude to Computers , Humans , Physicians, Family , Practice Guidelines as Topic , Regression Analysis , Surveys and Questionnaires
18.
Environ Mol Mutagen ; 45(1): 17-35, 2005.
Article in English | MEDLINE | ID: mdl-15605353

ABSTRACT

Genomic instability has been implicated as an important component in tumor progression. Evaluation of mutant frequencies (MFs) in tumors of transgenic mice containing nontranscribed marker genes should be useful for quantitating mutation rates in tumors as the physiologically inactive transgene provides neither a positive nor a negative selective pressure on the tumor. We have conducted long-term carcinogenicity studies in lambda/cII transgenic B6C3F1 mice using a variety of genotoxic and nongenotoxic test agents and have evaluated the mutant frequencies in both tumors and normal tissues from these animals. Mice were administered diethylnitrosamine (DEN) as three intraperitoneal injections of 15 mg/kg; phenobarbital (PB) or oxazepam (OXP) provided ad libitum at 0.1% or 0.25% in the diet, respectively; DEN initiation plus PB in the diet; or urethane (UTH) provided ad libitum at 0.2% in the drinking water. Normal tissues and tumors were isolated at various times over a 2-year period and half of each tissue/tumor was evaluated histopathologically and the other half was evaluated for MF in the cII transgene. Approximately 20 mutants from each of 166 individual tissues (tumor and nontumor) were sequenced to determine whether increases in MF represented unique mutations or were due to clonal expansion. UTH produced significant increases in MF in normal liver and lung. DEN either with or without PB promotion produced significant increases in MF in liver and correction of MF for clonality produced little change in the overall MF in these groups. PB produced a twofold increase in liver MF over controls after 27 weeks of treatment, but a similar increase was not observed with longer dosing times; at later time points, the MF in the PB groups was lower than that of the control group, suggesting that PB is not producing direct DNA damage in the liver. OXP failed to produce an increase in MF over controls, even after 78 weeks of treatment. Selected cases of genomic instability were observed in tumors from all treatments except OXP, with individual liver tumors showing very high MF values even after clonal correction. One rare and interesting finding was noted in a single mouse treated with UTH, where a mammary metastasis had an MF approximately 10-fold greater than the parent tumor, with 75% of the mutations independent, providing strong evidence of genomic instability. There was no clear correlation between tumor phenotype and MF except that pulmonary adenomas generally had higher MFs than normal lung in both genotoxic and nongenotoxic treatment groups. Likewise, there was no correlation between tumor size and MF after correction for clonality. The results presented here demonstrate that individual tumors can show significant genomic instability, with very significant increases in MF that are not attributed to clonal expansion of a single mutant cell.


Subject(s)
Carcinogens , Diethylnitrosamine , Liver Neoplasms, Experimental/genetics , Lung Neoplasms/genetics , Animals , Clone Cells , Female , Gene Frequency , Liver/ultrastructure , Liver Neoplasms, Experimental/chemically induced , Liver Neoplasms, Experimental/pathology , Lung/ultrastructure , Lung Neoplasms/chemically induced , Lung Neoplasms/pathology , Male , Mice , Mice, Transgenic , Mutation , Oxazepam , Phenobarbital
19.
J Eval Clin Pract ; 10(4): 553-61, 2004 Nov.
Article in English | MEDLINE | ID: mdl-15482419

ABSTRACT

RATIONALE, AIMS AND OBJECTIVES: Evaluation of physician performance is increasingly based on patient satisfaction. However, few data are available regarding the extent to which individual physician profiles might be influenced by factors such as whether a physician's practice is open or closed. We evaluated whether panel status (whether or not a physician is accepting new patients) is associated with patient satisfaction with their primary care physician (PCP). METHODS: Cross-sectional analysis of patient satisfaction surveys. Surveys were available for 1,750 patients cared for by 69 PCPs. Patient satisfaction with their PCP was determined based on a composite of six questions derived from the Medical Outcomes Study. We used Generalized Estimating Equations to adjust for physician level variation. RESULTS: Patients of closed-panel physicians were more likely to rate their satisfaction with the provider as 'Excellent' or 'Very Good' compared to patients of open-panel physicians (78% vs. 69%, P <0.0001). After adjusting for satisfaction with the practice site, provider years in practice, managed care coverage, provider productivity, and patient race, the association between a closed panel and satisfaction remained significant (odds ratio 1.60, 95% confidence interval 1.10-2.31). CONCLUSIONS: Individual physicians' patient satisfaction data are confounded by factors not likely to be adjusted for in available profiles. After adjusting for other variables, physicians with closed panels still had better patient satisfaction compared to physicians with open panels. Further research is necessary to determine if panel status might also confound patient satisfaction.


Subject(s)
Patient Satisfaction/statistics & numerical data , Physicians, Family/standards , Primary Health Care/standards , Boston , Confounding Factors, Epidemiologic , Cross-Sectional Studies , Female , Health Care Surveys , Humans , Male , Middle Aged , Physicians, Family/classification
20.
Am J Med ; 117(5): 318-24, 2004 Sep 01.
Article in English | MEDLINE | ID: mdl-15336581

ABSTRACT

BACKGROUND: Since 1991, hospitals have asked patients whether they have advance directives, but few patients complete these documents. We assessed two simple interventions to improve completion of advance directives among elderly or chronically ill outpatients. METHODS: We conducted a cluster randomized controlled trial involving 1079 patients from five general medicine clinics that were affiliated with an academic medical center. Patients were either > or =70 years of age or > or =50 years old with a chronic illness. The study comprised three arms: physician reminders recommending documentation of advance directives, physician reminders plus mailing advance directives to patients together with educational literature, or neither intervention (control). The main outcome measure was completion of an advance directive. RESULTS: After 28 weeks, 1.5% (5/332) of patients in the physician reminder group, 14% (38/277) in the physician reminder plus patient mailing group, and 1.8% (5/286) in the control group had completed advance directives. In multivariate analyses, patients in the physician reminder plus patient mailing group were much more likely than controls to have completed advance directives (odds ratio [OR] = 5.9; 95% confidence interval [CI]: 1.5 to 22), whereas patients in the physician reminder-only group were no more likely than controls to have completed advance directives (OR = 0.88; 95% CI: 0.21 to 3.7). CONCLUSION: Mailing health care proxy and living will forms and literature to patients before an appointment at which their physicians received a reminder about advance directives yielded a small but significant improvement in completion of these documents. A physician reminder alone did not have an effect.


Subject(s)
Advance Care Planning/standards , Correspondence as Topic , Patient Acceptance of Health Care/psychology , Physicians/psychology , Primary Health Care/standards , Reminder Systems/standards , Adult , Advance Care Planning/statistics & numerical data , Age Factors , Aged , Attitude of Health Personnel , Chronic Disease , Female , Health Knowledge, Attitudes, Practice , Humans , Logistic Models , Male , Middle Aged , Multivariate Analysis , Outcome Assessment, Health Care , Patient Acceptance of Health Care/statistics & numerical data , Physicians/statistics & numerical data , Practice Patterns, Physicians'/standards , Practice Patterns, Physicians'/statistics & numerical data , Sex Factors , Total Quality Management/organization & administration
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