Publications by authors named "Savitz S"

Article Synopsis
  • * The study faced challenges like clinics dropping out and care disruptions due to COVID-19, along with significant differences in patient populations between the program and usual care, leading to the use of propensity score matching to adjust for these discrepancies.
  • * Key lessons learned emphasized the importance of adapting methods in response to unexpected issues and weighing the tradeoffs of pragmatic design elements in research to generate useful evidence for clinical practice.
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  • Bipolar disorder is common in primary care, but effective collaborative treatment models for bipolar depression are lacking, prompting a study to compare pharmacological treatment patterns across primary care, integrated behavioral health, and mood specialty clinics.
  • The research analyzed treatment approaches for adults with bipolar depression in 2020, focusing on various pharmacological strategies and utilizing logistic regression for data analysis.
  • Results showed that primary care tended to continue existing treatments while integrated behavioral health and specialty clinics favored combination therapy; overall, the study highlights delays in care and emphasizes the need for improved decision support tools in bipolar depression management.
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Purpose: This study aimed to describe stroke survivors' experiences receiving telemedicine visits at the Lone Star Stroke Consortium during the COVID-19 pandemic.

Materials And Methods: A qualitative descriptive phenomenological design was applied to gather patients' telemedicine experiences through in-depth interviews, using a study guide. Audio-recorded interviews were conducted via ZOOM and transcribed verbatim.

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This secondary data analysis sought to identify characteristics associated with mistreatment among chronic stroke survivors who transition to dementia. We examined baseline data from a multi-time series survey study ( = 453; ) on caregiving experiences influencing dementia family caregivers' abusive or neglectful behaviors. Inferential statistical analysis indicated that baseline mistreatment rates were similar across stroke and non-stroke subgroups, though this finding was not significant.

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BACKGROUND: A multitude of variables influence an individual's decision to seek care in emergency situations. By recognizing these variables and their impact on the timeline of an individual seeking care for a stroke, nurses have an opportunity to positively affect the outcomes of stroke within the community. The purpose of this narrative review was to develop a research framework describing the variables involved in care seeking during an acute stroke.

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Background: We developed a noninvasive biomarker to quantify the rate of ventricular blood clearance in patients with intracerebral hemorrhage and extension to the ventricles-intraventricular hemorrhage.

Methods: We performed magnetic resonance imaging in 26 patients at 1, 14, 28, and 42 days of onset and measured their hematoma volume (HV), ventricular blood volume (VBV), and two diffusion metrics: fractional anisotropy (FA), and mean diffusivity (MD). The ipasilesional ventricular cerebral spinal fluid's FA and MD were associated with VBV and stroke severity scores (National Institute of Health Stroke Scale [NIHSS]).

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Objective: To evaluate whether access to buprenorphine to treat opioid use disorder (OUD) was associated with the coronavirus disease pandemic, the relaxation of training requirements to obtain an X-Waiver to prescribe buprenorphine (April 2021), and the removal of the X-Waiver (December 2022).

Patients And Methods: The OptumLabs Data Warehouse, which includes claims from Commercial and Medicare Advantage enrollees, was used to evaluate trends in prescription fills from January 1, 2019, to June 30, 2023. We compared fill patterns of buprenorphine for OUD with acamprosate to treat alcohol use disorder and naltrexone to treat alcohol use disorder or OUD.

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Article Synopsis
  • The study focused on evaluating disparities in post-stroke cognitive impairment (PSCI) using a large electronic health records database, highlighting significant racial and geographic differences.
  • A total of 150,142 patients aged 40 and over who experienced their first ischemic stroke were analyzed, revealing that African American survivors were more likely to develop PSCI compared to their White counterparts.
  • Traditional risk factors like age, sex, and certain health conditions were linked to PSCI, with findings indicating that the incidence was notably higher among African Americans, particularly in the Southern U.S., with a median onset of 1.8 years for cognitive impairment documentation.
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Background: Tenecteplase (TNK) is considered a promising option for the treatment of acute ischemic stroke (AIS) with the potential to decrease door-to-needle times (DTN). This study investigates DTN metrics and trends after transition to tenecteplase.

Methods: The Lone Star Stroke (LSS) Research Consortium TNK registry incorporated data from three Texas hospitals that transitioned to TNK.

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Background: Stroke is an important cause of morbidity in pediatrics. Large studies are needed to better understand the epidemiology, pathogenesis and risk factors associated with pediatric stroke. Large administrative datasets can provide information on risk factors in perinatal and childhood stroke at low cost.

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Randomized Clinical trials (RCT) suffer from a high failure rate which could be caused by heterogeneous responses to treatment. Despite many models being developed to estimate heterogeneous treatment effects (HTE), there remains a lack of interpretable methods to identify responsive subgroups. This work aims to develop a framework to identify subgroups based on treatment effects that prioritize model interpretability.

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Patients with cardiovascular diseases who experience disease-related short-term events, such as hospitalizations, often exhibit diverse long-term survival outcomes compared to others. In this study, we aim to improve the prediction of long-term survival probability by incorporating two short-term events using a flexible varying coefficient landmark model. Our objective is to predict the long-term survival among patients who survived up to a pre-specified landmark time since the initial admission.

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BACKGROUND: Delay time to hospital arrival may be influenced by lack of recognition of stroke signs and the necessity to seek emergency medical, which in turn is influenced by language barriers to, a modifiable risk factor, stroke awareness education. The objective was to determine the comprehension and satisfaction of a Spanish stroke awareness acronym, RÁPIDO, among community-living, Hispanic and Latino, Spanish-reading adults. METHODS: A 33-item survey was completed by 166 adults.

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Background And Objectives: Levetiracetam is a widely used antiseizure medication. Recent concerns have been raised regarding the potential prolongation of the QT interval by levetiracetam and increased risk of sudden cardiac death. This could have profound implications for patient safety and for prescribing practice.

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Background: Recruitment of participants is the greatest risk to completion of most clinical trials, with 20-40% of trials failing to reach the targeted enrollment. This is particularly true of trials of central nervous system (CNS) therapies such as intervention for chronic stroke. The PISCES III trial was an invasive trial of stereotactically guided intracerebral injection of CTX0E03, a fetal derived neural stem cell line, in patients with chronic disability due to ischemic stroke.

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Background: Knowledge gaps remain on stroke risk and disparities between sexual minority (SM) subgroups. In this study, stroke risk between SM subgroups, specifically gay/bisexual men and lesbian/bisexual women (G/BM and L/BW), was assessed.

Method: Data were collected in June 2022 using a bilingual (English and Spanish) cross-sectional paper-and-pen survey distributed among 183 SM individuals attending the 2022 Houston Pride Parade and Festival, as well as across Texas via phone call or online format.

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Background: The dynamics of blood clot (combination of Hb [hemoglobin], fibrin, and a higher concentration of aggregated red blood cells) formation within the hematoma of an intracerebral hemorrhage is not well understood. A quantitative neuroimaging method of localized coagulated blood volume/distribution within the hematoma might improve clinical decision-making.

Methods: The deoxyhemoglobin of aggregated red blood cells within extravasated blood exhibits a higher magnetic susceptibility due to unpaired heme iron electrons.

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Background: Tenecteplase (TNK) is gaining recognition as a novel therapy for acute ischemic stroke (AIS). Despite TNK offering a longer half-life, time and cost saving benefits and comparable treatment and safety profiles to Alteplase (ALT), the adoption of TNK as a treatment for AIS presents challenges for hospital systems.

Objective: Identify barriers and facilitators of TNK implementation at acute care hospitals in Texas.

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In multivariate recurrent event data, each patient may repeatedly experience more than one type of event. Analysis of such data gets further complicated by the time-varying dependence structure among different types of recurrent events. The available literature regarding the joint modeling of multivariate recurrent events assumes a constant dependency over time, which is strict and often violated in practice.

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Article Synopsis
  • Cell therapy using MultiStem, a multipotent progenitor cell product from bone marrow, is being evaluated for its potential to treat ischemic stroke, which involves a lack of blood flow to the brain.
  • The TREASURE trial, a double-blind, placebo-controlled study conducted at 44 centers in Japan, aimed to determine the safety and efficacy of MultiStem when given to patients within 18-36 hours of stroke onset.
  • Key outcomes were measured through various scales at 90 and 365 days post-treatment, assessing safety and overall recovery, with the study involving 206 patients (104 receiving MultiStem and 102 receiving placebo).
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  • - The study analyzed off-label use of patent foramen ovale (PFO) closure across various conditions, like migraines and strokes, among patients with insurance from 2006 to 2019, finding that the procedure's use increased over time.
  • - Out of 5,315 patients who underwent PFO closure, the majority (58.6%) were for stroke/systemic embolism, while a significant portion (almost 50%) received the procedure for unapproved indications, highlighting a disconnect with regulatory guidelines.
  • - The findings suggest that PFO closure rates did not meaningfully align with clinical trial advancements or regulatory approvals, indicating a need for better coordination between regulators and payers to prioritize patient safety by encouraging use for
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Autologous bone marrow mononuclear cells (BMMNCs) infused after severe traumatic brain injury have shown promise for treating the injury. We evaluated their impact in children, particularly their hypothesized ability to preserve the blood-brain barrier and diminish neuroinflammation, leading to structural CNS preservation with improved outcomes. We performed a randomized, double-blind, placebo-sham-controlled Bayesian dose-escalation clinical trial at two children's hospitals in Houston, TX and Phoenix, AZ, USA (NCT01851083).

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Background And Objectives: Evidence of the so-called "obesity paradox," which refers to the protective effect and survival benefit of obesity in patients with spontaneous intracerebral hemorrhage (ICH), remains controversial. This study aims to determine the association between body mass index (BMI) and functional outcomes in patients with ICH and whether it is modified by race/ethnicity.

Methods: Included individuals were derived from the Ethnic/Racial Variations of Intracerebral Hemorrhage study, which prospectively recruited 1,000 non-Hispanic White, 1,000 non-Hispanic Black, and 1,000 Hispanic patients with spontaneous ICH.

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