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Full-Text Articles in Physical Sciences and Mathematics

Effects Of Cost Sharing On Seeking Care For Serious And Minor Symptoms. Results Of A Randomized Controlled Trial, Martin Shapiro, John Ware, Cathy Sherbourne Dec 2015

Effects Of Cost Sharing On Seeking Care For Serious And Minor Symptoms. Results Of A Randomized Controlled Trial, Martin Shapiro, John Ware, Cathy Sherbourne

Martin Shapiro

To estimate the effect of cost sharing on seeking care for serious and minor symptoms, we analyzed data for 3539 persons aged 17 to 61 from the Rand Health Insurance Experiment. Participants were randomly assigned to a free-care group or to insurance plans requiring them to pay part of the costs (cost-sharing group). Annual surveys were administered to determine if participants had serious and minor symptoms during the preceding month and whether they saw a physician. Serious symptoms were judged by a panel of physicians to warrant care in most instances; minor symptoms were judged neither to be severe nor …


Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Systematic Review And Meta-Analysis, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw Jul 2015

Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Systematic Review And Meta-Analysis, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw

Richard A. Malthaner

Background: Carcinoma of the esophagus is an aggressive malignancy with an increasing incidence. Its virulence, in terms of symptoms and mortality, justifies a continued search for optimal therapy. The large and growing number of patients affected, the high mortality rates, the worldwide geographic variation in practice, and the large body of good quality research warrants a systematic review with meta-analysis.

Methods: A systematic review and meta-analysis investigating the impact of neoadjuvant or adjuvant therapy on resectable thoracic esophageal cancer to inform evidence-based practice was produced.MEDLINE, CANCERLIT, Cochrane Library, EMBASE, and abstracts from the American Society of Clinical Oncology and the …


Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Clinical Practice Guideline, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw Jul 2015

Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Clinical Practice Guideline, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw

Richard A. Malthaner

Background: Carcinoma of the esophagus is an aggressive malignancy with an increasing incidence. Its virulence, in terms of symptoms and mortality, justifies a continued search for optimal therapy. A clinical practice guideline was developed based on a systematic review investigating neoadjuvant or adjuvant therapy on resectable thoracic esophageal cancer. Methods: A systematic review with meta-analysis was developed and clinical recommendations were drafted. External review of the practice guideline report by practitioners in Ontario, Canada was obtained through a mailed survey, and incorporated. Final approval of the practice guideline was obtained from the Practice Guidelines Coordinating Committee. Results: The systematic review …


Cyclosporin Versus Tacrolimus For Liver Transplanted Patients, Elizabeth Haddad, Vivian Mcalister, Elizabeth Renouf, Richard Malthaner, Mette Kjaer, Lise Gluud Jul 2015

Cyclosporin Versus Tacrolimus For Liver Transplanted Patients, Elizabeth Haddad, Vivian Mcalister, Elizabeth Renouf, Richard Malthaner, Mette Kjaer, Lise Gluud

Richard A. Malthaner

A systematic review of randomized clinical trials (RCT) was undertaken to evaluate the beneficial and harmful effects of immunosuppression with cyclosporin versus tacrolimus for liver transplanted patients. MEDLINE, EMBASE, Cochrane Central and Hepato-Biliary Group Controlled Trials Registers were searched. Using fixed and random effects model, relative risk (RR), values <1 favoring>tacrolimus, with 95% confidence intervals (CI) were calculated. Of 717 potentially relevant references, 16 RCTs were eligible for inclusion. Mortality and graft loss at 1 year were significantly reduced in tacrolimus-treated recipients (Death: RR 0.85, 95% CI 0.73-0.99; graft loss: RR 0.73, 95% CI 0.61-0.86). Tacrolimus reduced the number of recipients …


Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Systematic Review And Meta-Analysis, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw Jul 2015

Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Systematic Review And Meta-Analysis, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw

Richard A. Malthaner

Background: Carcinoma of the esophagus is an aggressive malignancy with an increasing incidence. Its virulence, in terms of symptoms and mortality, justifies a continued search for optimal therapy. The large and growing number of patients affected, the high mortality rates, the worldwide geographic variation in practice, and the large body of good quality research warrants a systematic review with meta-analysis.

Methods: A systematic review and meta-analysis investigating the impact of neoadjuvant or adjuvant therapy on resectable thoracic esophageal cancer to inform evidence-based practice was produced.MEDLINE, CANCERLIT, Cochrane Library, EMBASE, and abstracts from the American Society of Clinical Oncology and the …


Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Clinical Practice Guideline, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw Jul 2015

Neoadjuvant Or Adjuvant Therapy For Resectable Esophageal Cancer: A Clinical Practice Guideline, Richard Malthaner, Rebecca Wong, R. Rumble, Lisa Zuraw

Richard A. Malthaner

Background: Carcinoma of the esophagus is an aggressive malignancy with an increasing incidence. Its virulence, in terms of symptoms and mortality, justifies a continued search for optimal therapy. A clinical practice guideline was developed based on a systematic review investigating neoadjuvant or adjuvant therapy on resectable thoracic esophageal cancer.

Methods: A systematic review with meta-analysis was developed and clinical recommendations were drafted. External review of the practice guideline report by practitioners in Ontario, Canada was obtained through a mailed survey, and incorporated. Final approval of the practice guideline was obtained from the Practice Guidelines Coordinating Committee.

Results: The systematic review …


Cyclosporin Versus Tacrolimus For Liver Transplanted Patients, Elizabeth Haddad, Vivian Mcalister, Elizabeth Renouf, Richard Malthaner, Mette Kjaer, Lise Gluud Jul 2015

Cyclosporin Versus Tacrolimus For Liver Transplanted Patients, Elizabeth Haddad, Vivian Mcalister, Elizabeth Renouf, Richard Malthaner, Mette Kjaer, Lise Gluud

Richard A. Malthaner

A systematic review of randomized clinical trials (RCT) was undertaken to evaluate the beneficial and harmful effects of immunosuppression with cyclosporin versus tacrolimus for liver transplanted patients. MEDLINE, EMBASE, Cochrane Central and Hepato-Biliary Group Controlled Trials Registers were searched. Using fixed and random effects model, relative risk (RR), values <1 favoring>tacrolimus, with 95% confidence intervals (CI) were calculated. Of 717 potentially relevant references, 16 RCTs were eligible for inclusion. Mortality and graft loss at 1 year were significantly reduced in tacrolimus-treated recipients (Death: RR 0.85, 95% CI 0.73-0.99; graft loss: RR 0.73, 95% CI 0.61-0.86). Tacrolimus reduced the number of recipients …


Crystal Structures Of Human Ctbp In Complex With Substrate Mtob Reveal Active Site Features Useful For Inhibitor Design, Brendan Hilbert, Steven Grossman, Celia Schiffer, William Royer Jan 2015

Crystal Structures Of Human Ctbp In Complex With Substrate Mtob Reveal Active Site Features Useful For Inhibitor Design, Brendan Hilbert, Steven Grossman, Celia Schiffer, William Royer

Celia A. Schiffer

The oncogenic corepressors C-terminal Binding Protein (CtBP) 1 and 2 harbor regulatory d-isomer specific 2-hydroxyacid dehydrogenase (d2-HDH) domains. 4-Methylthio 2-oxobutyric acid (MTOB) exhibits substrate inhibition and can interfere with CtBP oncogenic activity in cell culture and mice. Crystal structures of human CtBP1 and CtBP2 in complex with MTOB and NAD(+) revealed two key features: a conserved tryptophan that likely contributes to substrate specificity and a hydrophilic cavity that links MTOB with an NAD(+) phosphate. Neither feature is present in other d2-HDH enzymes. These structures thus offer key opportunities for the development of highly selective anti-neoplastic CtBP inhibitors. Elsevier B.V. All …


Conversion Of Red Fluorescent Protein Into A Bright Blue Probe, Oksana M. Subach, Illia S. Gundorov, Masami Yoshimura, Fedor V. Subach, Jinghang Zhang, David Grunwald, Ekaterina A. Souslova, Dmitriy M. Chudakov, Vladislav V. Verkhusha Nov 2014

Conversion Of Red Fluorescent Protein Into A Bright Blue Probe, Oksana M. Subach, Illia S. Gundorov, Masami Yoshimura, Fedor V. Subach, Jinghang Zhang, David Grunwald, Ekaterina A. Souslova, Dmitriy M. Chudakov, Vladislav V. Verkhusha

David Grünwald

We used a red chromophore formation pathway, in which the anionic red chromophore is formed from the neutral blue intermediate, to suggest a rational design strategy to develop blue fluorescent proteins with a tyrosine-based chromophore. The strategy was applied to red fluorescent proteins of the different genetic backgrounds, such as TagRFP, mCherry, HcRed1, M355NA, and mKeima, which all were converted into blue probes. Further improvement of the blue variant of TagRFP by random mutagenesis resulted in an enhanced monomeric protein, mTagBFP, characterized by the substantially higher brightness, the faster chromophore maturation, and the higher pH stability than blue fluorescent proteins …


Trends In The Prevalence And Mortality Of Cognitive Impairment In The United States: Is There Evidence Of A Compression Of Cognitive Morbidity, Kenneth Langa, Eric Larson, Jason Karlawish, David Cutler, Mohammed Kabeto, Scott Kim, Allison Rosen Nov 2014

Trends In The Prevalence And Mortality Of Cognitive Impairment In The United States: Is There Evidence Of A Compression Of Cognitive Morbidity, Kenneth Langa, Eric Larson, Jason Karlawish, David Cutler, Mohammed Kabeto, Scott Kim, Allison Rosen

Jason Karlawish

BACKGROUND: Recent medical, demographic, and social trends might have had an important impact on the cognitive health of older adults. To assess the impact of these multiple trends, we compared the prevalence and 2-year mortality of cognitive impairment (CI) consistent with dementia in the United States in 1993 to 1995 and 2002 to 2004. METHODS: We used data from the Health and Retirement Study (HRS), a nationally representative population-based longitudinal survey of U.S. adults. Individuals aged 70 years or older from the 1993 (N = 7,406) and 2002 (N = 7,104) waves of the HRS were included. CI was determined …


Striving For Cultural Competence In An Hiv Program: The Transformative Impact Of A Microsystem In A Larger Health Network, Judith N Sabino, Timothy Friel, Lynn Deitrick, Debbie Salas-Lopez Sep 2014

Striving For Cultural Competence In An Hiv Program: The Transformative Impact Of A Microsystem In A Larger Health Network, Judith N Sabino, Timothy Friel, Lynn Deitrick, Debbie Salas-Lopez

Debbie Salas-Lopez MD, MPH

No abstract provided.


Preparation Of Oriented, Fully Hydrated Lipid Samples For Structure Determination Using X-Ray Scattering., Stephanie Tristram-Nagle Aug 2014

Preparation Of Oriented, Fully Hydrated Lipid Samples For Structure Determination Using X-Ray Scattering., Stephanie Tristram-Nagle

Prof. Stephanie Tristram-Nagle Ph.D.

This chapter describes a method of sample preparation called "the rock and roll method," which is basically a solvent evaporation technique with controlled manual sample movement during evaporation of solvent from lipid/solvent mixtures that produces well-oriented thick stacks of about 2000 lipid bilayers. Many lipid types have been oriented using different solvent mixtures that balance solubilization of the lipid with uniform deposition of the lipid solution onto solid substrates. These well-oriented thick stacks are then ideal samples for collection of both X-ray diffraction data in the gel phase and X-ray diffuse scattering data in the fluid phase of lipids. The …


Lipid Bilayer Structure., John Nagle, Stephanie Tristram-Nagle Aug 2014

Lipid Bilayer Structure., John Nagle, Stephanie Tristram-Nagle

Prof. Stephanie Tristram-Nagle Ph.D.

Fluctuations, inherent in flexible and biologically relevant lipid bilayers, make quantitative structure determination challenging. Shortcomings in older methods of structure determination have been realized and new methodologies have been introduced that take fluctuations into account. The large uncertainty in literature values of lipid bilayer structural parameters is being reduced.


Hiv Fusion Peptide Penetrates, Disorders, And Softens T-Cell Membrane Mimics., Stephanie Tristram-Nagle, Rob Chan, Edgar Kooijman, Pradeep Uppamoochikkal, Wei Qiang, David Weliky, Pradeep Uppamoochikkal Aug 2014

Hiv Fusion Peptide Penetrates, Disorders, And Softens T-Cell Membrane Mimics., Stephanie Tristram-Nagle, Rob Chan, Edgar Kooijman, Pradeep Uppamoochikkal, Wei Qiang, David Weliky, Pradeep Uppamoochikkal

Prof. Stephanie Tristram-Nagle Ph.D.

This work investigates the interaction of N-terminal gp41 fusion peptide (FP) of human immunodeficiency virus type 1 (HIV-1) with model membranes in order to elucidate how FP leads to fusion of HIV and T-cell membranes. FP constructs were (i) wild-type FP23 (23 N-terminal amino acids of gp41), (ii) water-soluble monomeric FP that adds six lysines on the C-terminus of FP23 (FPwsm), and (iii) the C-terminus covalently linked trimeric version (FPtri) of FPwsm. Model membranes were (i) LM3 (a T-cell mimic), (ii) 1,2-dioleoyl-sn-glycero-3-phosphocholine, (iii) 1,2-dioleoyl-sn-glycero-3-phosphocholine/30 mol% cholesterol, (iv) 1,2-dierucoyl-sn-glycero-3-phosphocholine, and (v) 1,2-dierucoyl-sn-glycero-3-phosphocholine/30 mol% cholesterol. Diffuse synchrotron low-angle x-ray scattering from fully …


A Randomized, Double-Blind, Placebo-Controlled Study To Assess The Effect Of Recombinant Human Erythropoietin On Functional Outcomes In Anemic, Critically Ill, Trauma Subjects: The Long Term Trauma Outcomes Study, Fred Luchette, Michael Pasquale, Timothy Fabian, Wayne Langholff, Marsha Wolfson Mar 2014

A Randomized, Double-Blind, Placebo-Controlled Study To Assess The Effect Of Recombinant Human Erythropoietin On Functional Outcomes In Anemic, Critically Ill, Trauma Subjects: The Long Term Trauma Outcomes Study, Fred Luchette, Michael Pasquale, Timothy Fabian, Wayne Langholff, Marsha Wolfson

Michael D Pasquale MD, FACS, FCCM

BACKGROUND: Achieving a higher hemoglobin (Hb) level might allow the anemic, critically ill, trauma patient to have an improved outcome during rehabilitation therapy. METHODS: Patients with major blunt trauma orthopedic injuries were administered epoetin alfa or placebo weekly both in hospital and for up to 12 weeks after discharge or until the Hb level was >12.0 g/dL, whichever occurred first. The 36-question Short Form Health Assessment questionnaire (SF-36) was used to evaluate physical function (PF) outcomes at baseline, at hospital discharge, and at several time points posthospital discharge. RESULTS: One hundred ninety-two patients were enrolled (epoetin alfa [n = 97], …


Managed Care, Hospice Use, Site Of Death, And Medical Expenditures In The Last Year Of Life, Ezekiel Emanuel, Arlene Ash, Wei Yu, Gail Gazelle, Norman Levinsky, Olga Saynina, Mark Mcclellan, Mark Moskowitz Jul 2013

Managed Care, Hospice Use, Site Of Death, And Medical Expenditures In The Last Year Of Life, Ezekiel Emanuel, Arlene Ash, Wei Yu, Gail Gazelle, Norman Levinsky, Olga Saynina, Mark Mcclellan, Mark Moskowitz

wei yu

BACKGROUND: We examined deaths of Medicare beneficiaries in Massachusetts and California to evaluate the effect of managed care on the use of hospice and site of death and to determine how hospice affects the expenditures for the last year of life.

METHODS: Medicare data for beneficiaries in Massachusetts (n = 37 933) and California (n = 27 685) who died in 1996 were merged with each state's death certificate files to determine site and cause of death. Expenditure data were Health Care Financing Administration payments and were divided into 30-day periods from the date of death back 12 months.

RESULTS: …


Detecting Humans Under Occlusion Using Variational Mean Field Method, Duc Thanh Nguyen, Philip Ogunbona, Wanqing Li Dec 2012

Detecting Humans Under Occlusion Using Variational Mean Field Method, Duc Thanh Nguyen, Philip Ogunbona, Wanqing Li

Associate Professor Wanqing Li

This paper proposes a human detection method using variational mean field approximation for occlusion reasoning. In the method, parts of human objects are detected individually using template matching. Initial detection hypotheses with spatial layout information are represented in a graphical model and refined through a Bayesian estimation. In this paper, mean field method is employed for such an estimation. The proposed method was evaluated on the popular CAVIAR-INRIA dataset. Experimental results show that the proposed algorithm is able to detect humans in severe occlusion within reasonable processing time.


Prediction Of Radiation Pneumonitis By Dose-Volume Histogram Parameters In Lung Cancer--A Systematic Review, George Rodrigues, Michael Lock, David D'Souza, Edward Yu, Jake Van Dyk Nov 2012

Prediction Of Radiation Pneumonitis By Dose-Volume Histogram Parameters In Lung Cancer--A Systematic Review, George Rodrigues, Michael Lock, David D'Souza, Edward Yu, Jake Van Dyk

Michael Lock

BACKGROUND AND PURPOSE: To perform a systematic review of the predictive ability of various dose-volume histogram (DVH) parameters (V(dose), mean lung dose (MLD), and normal tissue complication probability (NTCP)) in the incidence of radiation pneumonitis (RP) caused by external-beam radiation therapy.

METHODS AND MATERIALS: Studies assessing the relationship between CT-based DVH reduction parameters and RP rate in radically treated lung cancer were eligible for the review. Synonyms for RP, lung cancer, DVH and its associated parameters (NTCP, V(20), V(30), MLD) were combined in a search strategy involving electronic databases, secondary reference searching, and consultation with experts. Individual or group data …


Detecting Humans Under Occlusion Using Variational Mean Field Method, Duc Thanh Nguyen, Philip Ogunbona, Wanqing Li Sep 2012

Detecting Humans Under Occlusion Using Variational Mean Field Method, Duc Thanh Nguyen, Philip Ogunbona, Wanqing Li

Professor Philip Ogunbona

This paper proposes a human detection method using variational mean field approximation for occlusion reasoning. In the method, parts of human objects are detected individually using template matching. Initial detection hypotheses with spatial layout information are represented in a graphical model and refined through a Bayesian estimation. In this paper, mean field method is employed for such an estimation. The proposed method was evaluated on the popular CAVIAR-INRIA dataset. Experimental results show that the proposed algorithm is able to detect humans in severe occlusion within reasonable processing time.


Trends And Outcomes Associated With Angiotensin-Converting Enzyme Inhibitors, Chyke Doubeni, Carol Bigelow, Darleen Lessard, Frederick Spencer, Jorge Yarzebski, Joel Gore, Jerry Gurwitz, Robert Goldberg Jan 2012

Trends And Outcomes Associated With Angiotensin-Converting Enzyme Inhibitors, Chyke Doubeni, Carol Bigelow, Darleen Lessard, Frederick Spencer, Jorge Yarzebski, Joel Gore, Jerry Gurwitz, Robert Goldberg

Chyke A. Doubeni

BACKGROUND: Limited recent data are available describing the patterns of use of angiotensin converting enzyme inhibitor (ACEI) therapy in patients with acute myocardial infarction (AMI), particularly from the more generalizable population-based setting. The purpose of this study was to examine trends in the receipt of ACEIs and associated short-term outcomes in patients hospitalized with AMI in a large Northeastern community.

METHODS: We conducted a community-wide study of 7991 patients hospitalized with AMI in all metropolitan Worcester, Massachusetts, medical centers during 8 annual periods between 1990 and 2003.

RESULTS: Among all patients, 44% received ACEI therapy during their acute hospitalization. There …


Treatment Practices And Outcomes Of Patients With Established Peripheral Arterial Disease Hospitalized With Acute Myocardial Infarction In A Community Setting, Frederick Spencer, Darleen Lessard, Chyke Doubeni, Jorge Yarzebski, Joel Gore, Robert Goldberg Jan 2012

Treatment Practices And Outcomes Of Patients With Established Peripheral Arterial Disease Hospitalized With Acute Myocardial Infarction In A Community Setting, Frederick Spencer, Darleen Lessard, Chyke Doubeni, Jorge Yarzebski, Joel Gore, Robert Goldberg

Chyke A. Doubeni

BACKGROUND: There are little contemporary data available describing the hospital and long-term outcomes of patients with peripheral arterial disease (PAD) who are hospitalized with acute myocardial infarction (AMI). The objectives of our population-based study were to examine the hospital and long-term outcomes, as well as the use of different treatment practices, among patients with established PAD who were hospitalized with AMI. METHODS: The study sample consisted of 4480 patients hospitalized with AMI at all Worcester, Mass, medical centers in 4 alternate years between 1997 and 2003. RESULTS: Among the metropolitan Worcester residents hospitalized with AMI, 13.5% had a history of …


Declining Length Of Stay For Patients Hospitalized With Ami: Impact On Mortality And Readmissions, Jane Saczynski, Darleen Lessard, Frederick Spencer, Jerry Gurwitz, Joel Gore, Jorge Yarzebski, Robert Goldberg Feb 2011

Declining Length Of Stay For Patients Hospitalized With Ami: Impact On Mortality And Readmissions, Jane Saczynski, Darleen Lessard, Frederick Spencer, Jerry Gurwitz, Joel Gore, Jorge Yarzebski, Robert Goldberg

Jorge L. Yarzebski

BACKGROUND: Length of hospital stay after acute myocardial infarction decreased significantly in the 1980s and 1990s. Whether length of stay has continued to decrease during the 2000s, and the impact of decreasing length of stay on rehospitalization and mortality, is unclear. We describe decade-long (1995-2005) trends in length of stay after acute myocardial infarction, and examine whether declining length of stay has impacted early rehospitalization and postdischarge mortality in a population-based sample of hospitalized patients.

METHODS: The study sample consisted of 4184 patients hospitalized with acute myocardial infarction in a central New England metropolitan area during 6 annual periods (1995, …


Management And Outcomes Of Renal Disease And Acute Myocardial Infarction, Paul Santolucito, Dennis Tighe, David Mcmanus, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg Feb 2011

Management And Outcomes Of Renal Disease And Acute Myocardial Infarction, Paul Santolucito, Dennis Tighe, David Mcmanus, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg

Jorge L. Yarzebski

BACKGROUND: Contemporary trends in the management and outcomes of chronic kidney disease patients who develop an acute myocardial infarction have not been adequately described, particularly from the more generalizable perspective of a population-based investigation. METHODS: The study population consisted of 6219 residents of the Worcester, Massachusetts, metropolitan area who were hospitalized with acute myocardial infarction in 6 annual periods between 1995 and 2005. Patients were categorized as having preserved kidney function (n=3154), mild to moderate chronic kidney disease (n=2313), or severe chronic kidney disease (n=752) at the time of hospital admission. RESULTS: Patients with chronic kidney disease were more likely …


Distribution Of Health Care Expenditures For Hiv-Infected Patients, Ray Y. Chen, Neil A. Accortt, Andrew O. Westfall, Michael J. Mugavero, James L. Raper, Gretchen A. Cloud, Beth K. Stone, Jerome Carter, Stephanie Call, Maria Pisu, Jeroan J. Allison, Michael S. Saag Aug 2010

Distribution Of Health Care Expenditures For Hiv-Infected Patients, Ray Y. Chen, Neil A. Accortt, Andrew O. Westfall, Michael J. Mugavero, James L. Raper, Gretchen A. Cloud, Beth K. Stone, Jerome Carter, Stephanie Call, Maria Pisu, Jeroan J. Allison, Michael S. Saag

Jeroan J. Allison

BACKGROUND: Health care expenditures for persons infected with human immunodeficiency virus (HIV) in the United State determined on the basis of actual health care use have not been reported in the era of highly active antiretroviral therapy.

METHODS: Patients receiving primary care at the University of Alabama at Birmingham HIV clinic were included in the study. All encounters (except emergency room visits) that occurred within the University of Alabama at Birmingham Hospital System from 1 March 2000 to 1 March 2001 were analyzed. Medication expenditures were determined on the basis of 2001 average wholesale price. Hospitalization expenditures were determined on …


Trends In Aids-Defining And Non-Aids-Defining Malignancies Among Hiv-Infected Patients: 1989-2002, Roger Bedimo, Ray Y. Chen, Neil A. Accortt, James L. Raper, Carol Linn, Jeroan J. Allison, John Dubay, Michael S. Saag, Craig J. Hoesley Aug 2010

Trends In Aids-Defining And Non-Aids-Defining Malignancies Among Hiv-Infected Patients: 1989-2002, Roger Bedimo, Ray Y. Chen, Neil A. Accortt, James L. Raper, Carol Linn, Jeroan J. Allison, John Dubay, Michael S. Saag, Craig J. Hoesley

Jeroan J. Allison

In a comparison of rates of acquired immunodeficiency syndrome (AIDS)-defining malignancies (ADMs) for 1989-1996 versus 1997-2002, we found a decrease in ADMs (rate ratio, 0.31; P<.0001) and a significant increase in non-AIDS-defining malignancies (non-ADMs; rate ratio, 10.87; P<.0002). The mean CD4 cell count was lower among patients with ADMs than among those with non-ADMs. A longer duration of survival during highly active antiretroviral therapy might explain the increasing incidence of non-ADMs.


Body Mass Index, Treatment Practices, And Mortality In Patients With Acute Heart Failure, Timothy Fitzgibbons, Olga Hardy, Darleen Lessard, Joel Gore, Jorge Yarzebski, Robert Goldberg Jul 2010

Body Mass Index, Treatment Practices, And Mortality In Patients With Acute Heart Failure, Timothy Fitzgibbons, Olga Hardy, Darleen Lessard, Joel Gore, Jorge Yarzebski, Robert Goldberg

Jorge L. Yarzebski

OBJECTIVES: Obesity is associated with an increased risk of heart failure (HF). Among patients presenting with acute HF, however, differences in clinical characteristics, treatment regimens, and short-term prognosis of varying weights are largely unknown, particularly from a broader population-based perspective. METHODS: A total of 3722 patients admitted with acute HF to 11 greater Worcester (Massachusetts, USA) hospitals during 1995 and 2000 were categorized as being lean (n = 216), normal weight (n = 1465), overweight (n = 1007), or obese (n = 1034) at the time of hospitalization. RESULTS: Obese patients with decompensated HF were significantly younger (mean age = …


Prognosis Of Acute Myocardial Infarction Complicated By Complete Heart Block (The Worcester Heart Attack Study), Robert Goldberg, Juan Zevallos, Jorge Yarzebski, Joseph Alpert, Joel Gore, Z. Chen, James Dalen Jul 2010

Prognosis Of Acute Myocardial Infarction Complicated By Complete Heart Block (The Worcester Heart Attack Study), Robert Goldberg, Juan Zevallos, Jorge Yarzebski, Joseph Alpert, Joel Gore, Z. Chen, James Dalen

Jorge L. Yarzebski

As part of a community-based study of patients hospitalized with acute myocardial infarction (AMI) in the Worcester, Massachusetts, metropolitan area, changes over time in the incidence rates of complete heart block (CHB) complicating AMI, and the prognostic impact of CHB on the in-hospital and long-term survival of these patients were examined. In all, 4,762 patients with validated AMI hospitalized at 16 hospitals in the Worcester metropolitan area during 1975, 1978, 1981, 1984, 1986 and 1988 constituted the study sample. The incidence rates of CHB complicating AMI remained relatively stable at 5.8% over the 13-year (1975 to 1988) period studied. The …


Changes Over Time In The Use Of Aspirin In Patients Hospitalized With Acute Myocardial Infarction (1975 To 1997): A Population-Based Perspective, Elizabeth Jackson, Ramya Sivasubramian, Frederick Spencer, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg Jul 2010

Changes Over Time In The Use Of Aspirin In Patients Hospitalized With Acute Myocardial Infarction (1975 To 1997): A Population-Based Perspective, Elizabeth Jackson, Ramya Sivasubramian, Frederick Spencer, Jorge Yarzebski, Darleen Lessard, Joel Gore, Robert Goldberg

Jorge L. Yarzebski

OBJECTIVE: The purpose of this study was to examine 2 decade-long trends in the use of aspirin and associated outcomes in patients hospitalized with acute myocardial infarction. BACKGROUND: Aspirin has been shown to be beneficial in the secondary prevention of AMI. However, little is known about changes over time in the use of aspirin in patients hospitalized with AMI and associated outcomes, particularly from a more generalizable population-based perspective. METHODS: We examined trends in aspirin use and hospital and long-term outcomes in 9336 metropolitan Worcester, Mass, residents hospitalized with validated AMI in all area hospitals between 1975 and 1997. RESULTS: …


Thirty-Year Trends (1975-2005) In The Magnitude, Patient Characteristics, And Hospital Outcomes Of Patients With Acute Myocardial Infarction Complicated By Ventricular Fibrillation, Robert Goldberg, Jorge Yarzebski, Frederick Spencer, Juan Zevallos, Darleen Lessard, Joel Gore Jul 2010

Thirty-Year Trends (1975-2005) In The Magnitude, Patient Characteristics, And Hospital Outcomes Of Patients With Acute Myocardial Infarction Complicated By Ventricular Fibrillation, Robert Goldberg, Jorge Yarzebski, Frederick Spencer, Juan Zevallos, Darleen Lessard, Joel Gore

Jorge L. Yarzebski

Limited contemporary data are available describing the incidence rates, hospital prognosis, and factors associated with the occurrence of ventricular fibrillation (VF) in patients hospitalized with acute myocardial infarction (AMI). The objectives of our study were to examine 3-decade-long trends (1975 to 2005) in the magnitude, predictors, and hospital case-fatality rates associated with VF in residents of a large New England metropolitan area hospitalized at all area medical centers with an uncomplicated AMI. The study population consisted of 7,472 residents of the Worcester (Massachusetts) metropolitan area hospitalized with an uncomplicated AMI in 15 annual periods from 1975 to 2005. The overall …


Temporal Trends (1975 Through 1990) In The Incidence And Case-Fatality Rates Of Primary Ventricular Fibrillation Complicating Acute Myocardial Infarction. A Communitywide Perspective, David Chiriboga, Jorge Yarzebski, Robert Goldberg, Joel Gore, Joseph Alpert Jul 2010

Temporal Trends (1975 Through 1990) In The Incidence And Case-Fatality Rates Of Primary Ventricular Fibrillation Complicating Acute Myocardial Infarction. A Communitywide Perspective, David Chiriboga, Jorge Yarzebski, Robert Goldberg, Joel Gore, Joseph Alpert

Jorge L. Yarzebski

BACKGROUND: As part of a population-based study of acute myocardial infarction, we examined changes over time in the incidence and in-hospital case-fatality rates of primary ventricular fibrillation complicating acute myocardial infarction. METHODS AND RESULTS: Patients with validated acute myocardial infarction hospitalized at 16 hospitals in the Worcester, Mass, metropolitan area between 1975 and 1990 comprised the study sample. During the 15-year study period, 5.1% of patients developed primary ventricular fibrillation in the setting of uncomplicated acute myocardial infarction, with this rate remaining relatively constant over time. Both age- and multivariable-adjusted analyses showed no significant trend in the incidence rates of …