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19,871 real negative results, null findings, and replication failures · Negative / Null Result Report. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Negative / Null Result ReportOpen accessDiseases of the circulatory (Cardiovascular) system

Partial revascularization plus medical treatment versus medical treatment alone in patients with multivessel coronary artery disease not eligible for CABG

M. Sadaka, M. Loutfy, M. Sobhy · 2013 · The Egyptian Heart Journal

Aim: The purpose of this study was to compare the impact of incomplete revascularization (IR) plus optimal medical therapy (OMT) to OMT alone on 1 year clinical outcomes in patients with multivessel coronary artery disease (MVD) who were not eligible for coronary bypass graft surgery (CABG). Methods: This is a prospective randomized study conducted on 50 selected patients with chronic stable angina with documented MVD and CABG was refused by the surgeon due to poor distal vessel quality. Patients were randomized 1:1 into two groups, group (I): 25 patients were subjected to OMT alone and group

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Negative / Null Result ReportOpen accessDiseases of the musculoskeletal system

Muscle wasting and function after muscle activation and early protocol‐based physiotherapy: an explorative trial

Tobias Wollersheim, Julius J. Grunow, Niklas M. Carbon et al. · 2019 · Journal of Cachexia, Sarcopenia and Muscle

Abstract Background Early mobilization improves physical independency of critically ill patients at hospital discharge in a general intensive care unit (ICU)‐cohort. We aimed to investigate clinical and molecular benefits or detriments of early mobilization and muscle activating measures in a high‐risk ICU‐acquired weakness cohort. Methods Fifty patients with a SOFA score ≥9 within 72 h after ICU admission were randomized to muscle activating measures such as neuromuscular electrical stimulation or whole‐body vibration in addition to early protocol‐based physiotherapy (intervention) or early p

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Negative / Null Result ReportOpen accessImmunologic diseases. Allergy

Determining eligibility for antiretroviral therapy in resource-limited settings using total lymphocyte counts, hemoglobin and body mass index

Solberg Peter, Were Willy, Downing Robert S et al. · 2007 · AIDS Research and Therapy

Abstract Background CD4+ T lymphocyte (CD4) cell count testing is the standard method for determining eligibility for antiretroviral therapy (ART), but is not widely available in sub-Saharan Africa. Total lymphocyte counts (TLCs) have not proven sufficiently accurate in identifying subjects with low CD4 counts. We developed clinical algorithms using TLCs, hemoglobin (Hb), and body mass index (BMI) to identify patients who require ART. Methods We conducted a cross-sectional study of HIV-infected adults in Uganda, who presented for assessment for ART-eligibility with WHO clinical stages I, II or

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Negative / Null Result ReportOpen accessSpecialties of internal medicine

Impact of an untrained CPR Coach in simulated pediatric cardiopulmonary arrest: A pilot study

Colleen M. Badke, Matthew L. Friedman, Z. Leah Harris et al. · 2020 · Resuscitation Plus

Aim: To determine if an untrained cardiopulmonary resuscitation (CPR) Coach, with no access to real-time CPR feedback technology, improves CPR quality. Methods: This was a prospective randomized pilot study at a tertiary care children's hospital that aimed to integrate an untrained CPR Coach into resuscitation teams during simulated pediatric cardiac arrest. Simulation events were randomized to two arms: control (no CPR Coach) or intervention (CPR Coach). Simulations were run by pediatric intensive care unit (PICU) providers and video recorded. Scenarios focused on full cardiopulmonary arrest;

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Negative / Null Result ReportOpen accessDiseases of the circulatory (Cardiovascular) system

Impacts of ketogenic diet intervention on cardiometabolic outcomes in obese, dysglycemic mice

Cassandra A. A. Locatelli, My-Anh Nguyen, Nadya M. Morrow et al. · 2026 · Cardiovascular Diabetology

Abstract Background The ketogenic diet (KD) is widely recognized for its potential benefits in individuals with type 2 diabetes, but findings from both human and animal studies remain inconsistent. Type 2 diabetes is often comorbid with liver steatosis and atherosclerosis which are characterized by inflammation and dysregulated lipid metabolism. Moreover, whereas KD has shown mixed, sometimes detrimental, effects on circulating cholesterol levels in humans, it is currently unclear the whole-body balance of risk and benefit across hepatic, atherosclerotic, and pancreatic effects. Methods We use

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Negative / Null Result ReportOpen accessPublic aspects of medicine

The Impact of Accreditation on the Performance of Hospital Emergency Departments

Abolghasem Pourreza, Ali Mohammad Mosadeghrad, Parsa Zoleikani · 2017 · پژوهش‌های سلامت‌محور

Background & Objectives: Accreditation, as a formal external evaluation system, has a critical role in improving quality, safety and effectiveness of hospital services. The aim of this study was to evaluate the effects of accreditation standards on the performance of Accident and Emergency (A&E) departments of hospitals in Sari, Iran. Methods: This cross-sectional descriptive - analytic study was carried out in eight hospitals in Sari, Iran. Information related to the accreditation scores and five performance indicators of A&E departments (i.e., average triage time, percentage of cardiopulmona

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Negative / Null Result ReportOpen accessPsychiatry

Unilateral vs. bilateral DLPFC rTMS: comparative effects on depression, visual-spatial memory, inhibitory control and cognitive flexibility in major depressive disorder

Fatemeh Asgharian Asl, Sajjad Abbaszade, Sajjad Abbaszade et al. · 2024 · Frontiers in Psychiatry

BackgroundExciting left DLPFC activity with high frequency and inhibiting right DLPFC with low frequency repetitive transcranial magnetic stimulation (rTMS) has shown antidepressant effects in major depressive disorder (MDD) and executive functions. However, few studies have directly compared unilateral and bilateral protocols.MethodsForty-seven individuals with treatment-resistant MDD underwent 10 sessions of rTMS over left DLPFC (20 Hz), bilateral DLPFC (left 20 Hz, right 1 Hz), or sham stimulation. Outcomes were depression (Beck Depression Inventory-II), visual-spatial memory (Corsi Block T

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Negative / Null Result ReportOpen accessRenewable energy sources

Organic/inorganic nanocomposite gels employed as electrolyte supports in Dye-sensitized Photoelectrochemical cells

Elias Stathatos, Panagiotis Lianos · 2002 · International Journal of Photoenergy

Dye-sensitized photoelectrochemical cells based on TiO2 mesoporous films, a ruthenium bipyridyl derivative as photosensitizer and a SiO2/poly(ethylene glycol)-200 nanocomposite thin film as electrolyte support, have been constructed. TiO2 films have been deposited on conductive transparent Indium-Tin Oxide glass slides by means of a sol-gel procedure carried out in reverse-micellar solutions. The photosensitizer has been adsorbed on titania films from ethanolic solutions while the electrolyte layer has been synthesized by a sol-gel procedure. The presence of silica in the nanocomposite electro

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Negative / Null Result ReportOpen accessDentistry

Effect of addition of polymerized polymethyl methacrylate (PMMA) and zirconia particles on impact strength, surface hardness, and roughness of heat cure PMMA: An in vitro study

Duaa Subhi Rasan, Firas Abdulameer Farhan · 2023 · Dental Hypotheses

Introduction: This study was designed to examine the effects of addition of the combination of polymerized polymethyl methacrylate (PMMA) and zirconia (ZrO2) particles to heat cure PMMA resin on impact strength, surface hardness, and roughness. Methods: The 70% (w/w) of polymerized PMMA powder (particle size: 0.70 µm) was mixed with 30% (w/w) of zirconia powder (ZrO2) (1 µm) to produce PMMA-ZrO2 filler. Ninety acrylic specimens created were divided into three groups containing 0% wt (Control group), 2% wt, and 4% wt, PMMA-ZrO2 filler. Ten specimens were used for impact strength, surface hardne

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Negative / Null Result ReportOpen accessMedicine

Forecasting biodiversity in breeding birds using best practices

David J. Harris, Shawn D. Taylor, Ethan P. White · 2018 · PeerJ

Biodiversity forecasts are important for conservation, management, and evaluating how well current models characterize natural systems. While the number of forecasts for biodiversity is increasing, there is little information available on how well these forecasts work. Most biodiversity forecasts are not evaluated to determine how well they predict future diversity, fail to account for uncertainty, and do not use time-series data that captures the actual dynamics being studied. We addressed these limitations by using best practices to explore our ability to forecast the species richness of bre

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Negative / Null Result ReportOpen accessNeurology. Diseases of the nervous system

CSF neurofilament light chain but not FLT3 ligand discriminates Parkinsonian disorders

Megan Kristy Herbert, Marjolein B Aerts, Marijke eBeenes et al. · 2015 · Frontiers in Neurology

The differentiation between multiple system atrophy (MSA) and Parkinson’s disease (PD) is difficult, particularly in early disease stages. Therefore, we aimed to evaluate the diagnostic value of neurofilament light chain (NFL), fms-like tyrosine kinase ligand (FLT3L) and total tau protein (t-tau) in cerebrospinal fluid (CSF) as biomarkers to discriminate MSA from PD. Using commercially available enzyme-linked immunoassays (ELISAs), we measured CSF levels of NFL, FLT3L and t-tau in a discovery cohort of 36 PD patients, 27 MSA patients and 57 non-neurological controls and in a validation cohort

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Negative / Null Result ReportOpen accessMedicine (General)

Community-based transconjunctival marginal rotation for cicatricial trachoma in Indians from the Upper Rio Negro basin

O.E. Soares, A.A.V. Cruz · 2004 · Brazilian Journal of Medical and Biological Research

The objective of the present study was to describe, for the first time in Brazil, the use by a non-ophthalmologist of a community-based marginal rotation procedure by a posterior approach in the indigenous population from the Upper Rio Negro basin. Seventy-three upper eyelids of 46 Indians (11 males and 35 females) with cicatricial upper eyelid entropion and trichiasis were operated in the Indian communities using a marginal rotational procedure by a posterior approach by a non-ophthalmologist physician who had general surgery experience but only an extremely short period (one week) of ophthal

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Negative / Null Result ReportOpen accessMedicine

MicroRNA-124-loaded nanoparticles increase survival and neuronal differentiation of neural stem cells in vitro but do not contribute to stroke outcome in vivo.

Cláudia Saraiva, Daniela Talhada, Akhilesh Rai et al. · 2018 · PLoS ONE

There is a high quest for novel therapeutic strategies to enhance recovery after stroke. MicroRNA-124 (miR-124) has been described as neuroprotective and anti-inflammatory molecule. Moreover, miR-124 is a well described enhancer of adult neurogenesis that could offer potentially beneficial effects. Herein, we used miR-124-loaded nanoparticles (miR-124 NPs) to evaluate their therapeutic potential in an in vitro and in vivo model of stroke. For that, neuroprotective and neurogenic responses were assessed in an in vitro model of stroke. Here, we found that miR-124 NPs decreased cell death and imp

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Negative / Null Result ReportOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry

The Relationship between Anxiety, Subjective and Objective Sleep, Chronotype and Circadian Rhythms with Depressive Symptoms in Insomnia Disorder

Maria Comas, Alejandra Solis Flores, Nicole Lovato et al. · 2023 · Brain Sciences

Insomnia is a highly prevalent sleep disorder with strong bidirectional associations with depressive symptoms. The circadian preference for eveningness has been shown to be associated with depressive symptoms in insomnia and other mental health conditions. However, there is a lack of studies in insomnia investigating whether objective measures, such as dim light melatonin onset (DLMO) or polysomnographic (PSG) sleep, are associated with depressive symptoms. Therefore, we investigated the associations between subjective measures (questionnaires assessing anxiety, sleep quality and circadian pre

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Negative / Null Result ReportOpen accessVeterinary medicine

The Use of Removed Mesquite Brush as a Fiber Replacement in Silage Production

William Taylor Fair, Jeffrey Bryan Breeden, Thomas Wayne Atchley et al. · 2022 · Animals

Mesquite ( Prosopis L.) is considered an invasive browse species in most of the American Southwest. Mechanical intervention removes yields an excess of organic debris. Anecdotal evidence in the past has supported using such browse as feed for livestock. Thus, our objectives were to (1) determine the nutritive value and fermentation characteristics of silage produced with mesquite biomass, and (2) evaluate solvent treatment of mesquite biomass prior to ensiling. In Experiment 1, we evaluated mesquite inclusion rate (0, 250, 500, 750, or 1000 g kg −1 DM), length of fermentation (28, 56, or 84 d)

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Negative / Null Result ReportOpen accessNeurology. Diseases of the nervous system

Deep brain stimulation in a patient with progressive myoclonic epilepsy and ataxia due to potassium channel mutation (MEAK). A case report and review of the literature

Michał Sobstyl, Nina Kożuch, Magdalena Iwaniuk-Gugała et al. · 2023 · Epilepsy & Behavior Reports

Progressive myoclonic epilepsy (PME) is characterized by prominent myoclonus, generalized tonic-clonic seizures, and less often focal, tonic, or absence seizures. The KCNC1 mutation is responsible for specific clinical phenotype of PME which has been defined as myoclonic epilepsy and ataxia due to potassium channel mutation (MEAK). We present a case of a 44 years-old male patient with genetically proven MEAK who underwent subthalamic nucleus/substantia nigra (STN/SNr) deep brain stimulation (DBS) for his pharmacological-refractory myoclonus and drug-resistant epilepsy (DRE). Since the age of 4

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Negative / Null Result ReportOpen accessPsychiatry

Efficacy and Safety of Cordyceps militaris as an Adjuvant to Duloxetine in the Treatment of Insomnia in Patients With Depression: A 6-Week Double- Blind, Randomized, Placebo-Controlled Trial

Jiaojiao Zhou, Xu Chen, Le Xiao et al. · 2021 · Frontiers in Psychiatry

Background: Insomnia is a common clinical manifestation in patients with depression. Insomnia is not only a depression symptom but also an independent risk factor for recurrence. Cordyceps militaris (C. militaris) is thought to have the potential to treat insomnia. This study aimed to examine the efficacy and safety of duloxetine with C. militaris in improving sleep symptoms in patients with depression.Methods: This study was a single-center, randomized, double-blind, placebo-controlled study that recruited outpatients admitted to Beijing Anding hospital from January 2018 to January 2019. Majo

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Negative / Null Result ReportOpen accessNeurology. Diseases of the nervous system

Phosphatidylserine enriched with polyunsaturated n‐3 fatty acid supplementation for attention‐deficit hyperactivity disorder in children and adolescents with epilepsy: A randomized placebo‐controlled trial

Sylvain Rheims, Vania Herbillon, Ségolène Gaillard et al. · 2024 · Epilepsia Open

Abstract Background Attention‐deficit hyperactivity disorder (ADHD) is a frequent comorbidity in children with epilepsy, which management mostly relies on the usual treatments of ADHD, especially methylphenidate. Supplementation with polyunsaturated n‐3 Fatty Acid (PUFA) has been proposed as an alternative therapeutic approach in ADHD without epilepsy but has never been evaluated in epilepsy‐associated ADHD. Methods A multicenter double blind randomized placebo‐controlled trial evaluating supplementation with PUFA, in eicosapentaenoic‐ and docosahexaenoic‐acid form, conjugated to a phospholipi

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Negative / Null Result ReportOpen accessMedicine (General)

Permissible Outcomes of Lobe-Specific Lymph Node Dissection for Elevated Carcinoembryonic Antigen in Non-Small Cell Lung Cancer

Hiroaki Kuroda, Junji Ichinose, Katsuhiro Masago et al. · 2021 · Medicina

Background and Objectives : Lobe-specific nodal dissection (L-SND) is currently acceptable for the dissection of early-stage non-small cell lung cancer (NSCLC) but not for cancers of more advanced clinical stages. We aimed to assess the efficacy of L-SND, compared to systemic nodal dissection (SND). Materials and Methods : We retrospectively collected the clinical data of patients with carcinoembryonic antigen (CEA) abnormality who underwent complete resection of NSCLC via lobectomy or more in addition to either SND or L-SND at two cancer-specific institutions from January 2006 to December 201

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Negative / Null Result ReportOpen accessNeoplasms. Tumors. Oncology. Including cancer and carcinogens

Clinical analysis of four serum tumor markers in 458 patients with ovarian tumors: diagnostic value of the combined use of HE4, CA125, CA19-9, and CEA in ovarian tumors

Chen F, Shen J, Wang J et al. · 2018 · Cancer Management and Research

Fawen Chen,1,2 Jing Shen,3 Jianwei Wang,1 Pengwei Cai,1 Yi Huang3 1Department of Clinical Laboratory, Fujian Provincial Hospital South Branch, 2Department of Blood Transfusion, 3Department of Clinical Laboratory, Fujian Provincial Hospital, Provincial Clinical College of Fujian Medical University, Fuzhou, People’s Republic of China Purpose: To investigate the diagnostic values of human epididymis protein 4 (HE4), carbohydrate antigen 125 (CA125), carbohydrate antigen 19-9 (CA19-9), and carcinoembryonic antigen (CEA) for ovarian tumors. Methods: The participants were divided into three gr

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Negative / Null Result ReportOpen accessNutrition. Foods and food supply

Understanding the Sensory Influences of Oak in the Production of Smoke-Affected Wines: A Case Study with Cabernet Sauvignon

Jenna A. Fryer, Elizabeth Tomasino · 2025 · Beverages

Wines produced from grapes exposed to wildfire smoke exhibit smoke-related flavors, such as smoky, burnt, and an ashy finish. While grapes are impacted on the vine, winemaking strategies can influence the perception of smoke-related properties in the resulting wine. This case study evaluated eight smoke-affected wines across three vintages from commercial production to assess how oak influences smoke-related flavors. Each vintage explored a different usage of oak, including oak origin, oak chips with carbon fining, and potential carryover of flavors through reused barrels. Wines were assessed

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Negative / Null Result ReportOpen accessBusiness

Determinants of Technical Efficiency in Wheat Production in Ethiopia

Daniel Hailu · 2020 · International Journal of Agricultural Economics

Ethiopia is the second largest wheat producing countries in Sub-Saharan Africa and most people rely on rain fed agriculture for their livelihoods. Wheat production has increased from 2,176,603 tons in 2005 to 4,219,257 tons in 2016 with…

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Negative / Null Result ReportOpen accessInternal medicine

Hepatitis E virus infection results in acute graft failure after liver transplantation: a case report

Xiangyan Liu, Tian Shen, Zhuoyi Wang et al. · 2014 · Journal of Infection in Developing Countries

Hepatitis E virus (HEV) infection in most individuals is known as a self-limiting, acute, icteric hepatitis, but evidence shows HEV is responsible for choric hepatitis and rapid progressed liver cirrhosis in immuno-compromised patients. We present the case of a patient whose diagnosis of acute graft failure was due to a HEV infection 7 years after his first liver transplantation because of Wilson’s disease. The process showed severe jaundice with fatigue, poor appetite and continually rising serum aminopherase. The blood serum was found positive for the anti-HEV IgG antibody but negative for a

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Negative / Null Result ReportOpen accessMedicine

The Novel New Jersey Eyewitness Instruction Induces Skepticism but Not Sensitivity.

Athan P Papailiou, David V Yokum, Christopher T Robertson · 2015 · PLoS ONE

In recent decades, social scientists have shown that the reliability of eyewitness identifications is much worse than laypersons tend to believe. Although courts have only recently begun to react to this evidence, the New Jersey judiciary has reformed its jury instructions to notify jurors about the frailties of human memory, the potential for lineup administrators to nudge witnesses towards suspects that they police have already identified, and the advantages of alternative lineup procedures, including blinding of the administrator. This experiment tested the efficacy of New Jersey's jury ins

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Negative / Null Result ReportOpen accessEducation

Critical Thinking of Medical Students: does it Change during the Study in Medical School?

Reza sharifinia, Abdolhussein Shakurnia · 2022 · Journal of Medical Education Development

Background & Objective: Critical thinking (CT) is essential in medical education and improves physicians' clinical ability and competency. The present study aimed to determine the CT level and the trend of its changes in medical education at Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran, in 2021. Materials & Methods: In this cross-sectional descriptive study, the CT levels of 165 medical students in three curricular phases, namely basic sciences, externship, and internship courses were examined. The data collection tool was the California Critical Thinking Skills Questionnaire

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Negative / Null Result ReportOpen accessNutrition. Foods and food supply

Effect of fermented oyster (Crassostrea gigas) extracts and regular walking on muscle strength and mass in older adults with relatively low muscle mass: A randomized controlled trial

Ye Li Lee, Sang Yeoup Lee, Sang Yeoup Lee et al. · 2022 · Frontiers in Nutrition

IntroductionOysters possess an excellent nutritional profile containing γ-aminobutyric acid (GABA). Previous data suggest that GABA is a potent bioactive compound for improving muscle health. Lactic acid fermentation is thought to increase GABA content. However, the effect of oral supplementation of fermented oyster extracts (FO) on human muscle strength and mass is unclear. Therefore, we tested the effects and safety of consumption of FO combined with regular walking for 12 weeks on muscle strength and mass in older adults with relatively low muscle mass.Materials and methodsA randomized cont

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Negative / Null Result ReportOpen accessVeterinary medicine

Effect of Shearing for Improving the Thermoregulatory Responses of Crossbred Sheep During Heat Stress

Lina Fernanda Pulido-Rodríguez, Alfredo Manuel Franco Pereira, Fábio Luís Henrique et al. · 2025 · Veterinary Sciences

Shearing to improve heat dissipation is common in sheep farming. This study evaluated the influence of shearing on thermoregulatory responses of crossbred sheep from adapted breeds exposed to heat stress. Ten ewes were kept in a climate chamber exposed to heat stress (10–13 h), reaching 37 ± 1.0 °C for nine days, during two consecutive periods, without shearing, and then at 14 days after shearing, evaluating all variables. Rectal temperature, respiration rate, sweating rate, ocular surface temperature, and skin temperature were analyzed at 7, 10, 13, 17, and 20 h, and blood cortisol was analyz

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Negative / Null Result ReportOpen accessOphthalmology

Comparison of intravitreal injection of ranibizumab, steroids, and pars plana vitrectomy for chronic persistent nonimproving diabetic macular edema with nontractional epiretinal membrane

Mahmoud F. Abdelaal, Soheir M. Esmat, Mohamed A. Salah Eldein et al. · 2026 · Delta Journal of Ophthalmology

Purpose This study aimed to compare the anatomical and functional outcomes of pars plana vitrectomy (PPV), intravitreal ranibizumab (IVR), and intravitreal triamcinolone acetonide (IVTA) injection in chronic persistent diabetic macular edema (DME) with nontractional epiretinal membrane (NT-ERM). Patients and methods This is a randomized prospective study that included 52 patients having chronic DME with NT-ERM who were divided into three groups: PPV with internal limiting membrane peeling group, IVR group, and IVTA group. The patients were evaluated by optical coherence tomography angiography

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Negative / Null Result ReportOpen accessMedicine

Treating social cognition impairment with the online therapy 'SoCoBo': A randomized controlled trial including traumatic brain injury patients.

Tobias Lohaus, Sally Reckelkamm, Patrizia Thoma · 2024 · PLoS ONE

Objective Acquired brain injuries (ABIs), such as traumatic brain injuries (TBIs), often entail impairments of general cognition (e.g., memory, attention or executive functions) and social cognition (e.g. emotion recognition, theory of mind [ToM], social problem-solving). The availability of fully computerized interventions targeting sociocognitive deficits specifically in neurologically impaired patients is extremely limited. Therefore, the Treatment Program for Deficits in Social Cognition and Social Competencies of the Ruhr University Bochum (SoCoBo), a fully computerized online therapy des

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