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11,287 real negative results, null findings, and replication failures in Medicine · 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 accessMedicine

Association between triglyceride-glucose index and all-cause mortality in critically ill patients with ischemic stroke: analysis of the MIMIC-IV database

Weimin Cai, Jun Xu, Xiao Wu et al. · 2023 · Cardiovascular Diabetology

Abstract Background The triglyceride-glucose (TyG) index was significantly associated with insulin resistance (IR). Several studies have validated the effect of TyG index on cerebrovascular disease. However, the value of TyG index in patients with severe stroke requiring ICU admission remains unclear. The aim of this study was to investigate the association between the TyG index and clinical prognosis of critically ill patients with ischemic stroke (IS). Methods This study identified patients with severe IS requiring ICU admission from the Medical Information Mart for Intensive Care (MIMIC-IV)

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Negative / Null Result ReportOpen accessMedicine

Effect of cannabis use in people with chronic non-cancer pain prescribed opioids: findings from a 4-year prospective cohort study

Gabrielle Campbell, Wayne Hall, Amy Peacock et al. · 2018 · The Lancet Public Health

BACKGROUND: Interest in the use of cannabis and cannabinoids to treat chronic non-cancer pain is increasing, because of their potential to reduce opioid dose requirements. We aimed to investigate cannabis use in people living with chronic…

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Negative / Null Result ReportOpen accessMedicine

Balloon kyphoplasty for the treatment of acute vertebral compression fractures: 2-year results from a randomized trial

Steven Boonen, Jan Van Meirhaeghe, L. Bastian et al. · 2011 · Journal of Bone and Mineral Research

Vertebral fractures are often painful and lead to reduced quality of life and disability. We compared the efficacy and safety of balloon kyphoplasty to nonsurgical therapy over 24 months in patients with acute painful fractures. Adults…

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Negative / Null Result ReportOpen accessMedicine

Response definition criteria for ELISPOT assays revisited

Zoe Moodie, Leah Price, Cécile Gouttefangeas et al. · 2010 · Cancer Immunology Immunotherapy

No consensus has been reached on how to determine if an immune response has been detected based on raw data from an ELISPOT assay. The goal of this paper is to enable investigators to understand and readily implement currently available…

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Negative / Null Result ReportMedicine

Psychoactive bacteriaLactobacillus rhamnosus(JB-1) elicits rapid frequency facilitation in vagal afferents

Azucena Pérez‐Burgos, Bingxian Wang, Yukang Mao et al. · 2012 · American Journal of Physiology-Gastrointestinal and Liver Physiology

Mounting evidence supports the influence of the gut microbiome on the local enteric nervous system and its effects on brain chemistry and relevant behavior. Vagal afferents are involved in some of these effects. We previously showed that…

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Negative / Null Result ReportOpen accessMedicine

Variations in Eyeball Diameters of the Healthy Adults

Inessa Bekerman, Paul Gottlieb, Michael Vaiman · 2014 · Journal of Ophthalmology

The purpose of the current research was to reevaluate the normative data on the eyeball diameters. Methods. In a prospective cohort study, the CT data of consecutive 250 adults with healthy eyes were collected and analyzed, and sagittal, transverse, and axial diameters of both eyeballs were measured. The data obtained from the left eye and from the right eye were compared. The correlation analysis was performed with the following variables: orbit size, gender, age, and ethnic background. Results. We did not find statistically significant differences correlated with gender of the patients and t

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Negative / Null Result ReportOpen accessMedicine

Comparative clinical evaluation of coronally advanced flap with or without platelet rich fibrin membrane in the treatment of isolated gingival recession

Thamaraiselvan Murugan, Sugumari Elavarasu, Thangakumaran Suthanthiran et al. · 2014 · Journal of Indian Society of Periodontology

AIM: The aim of this study was to determine whether the addition of an autologous platelet rich fibrin (PRF) membrane to a coronally advanced flap (CAF) would improve the clinical outcome in terms of root coverage, in the treatment of…

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Negative / Null Result ReportOpen accessMedicine

Vertebroplasty versus sham procedure for painful acute osteoporotic vertebral compression fractures (VERTOS IV): randomised sham controlled clinical trial

Cristina Firanescu, Jolanda De Vries, Paul Lodder et al. · 2018 · BMJ

OBJECTIVE: To assess whether percutaneous vertebroplasty results in more pain relief than a sham procedure in patients with acute osteoporotic compression fractures of the vertebral body. DESIGN: Randomised, double blind, sham controlled…

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Negative / Null Result ReportOpen accessMedicine

The impact of pharmacological and non‐pharmacological interventions to improve physical health outcomes in people with schizophrenia: a meta‐review of meta‐analyses of randomized controlled trials

Davy Vancampfort, Joseph Firth, Christoph U. Correll et al. · 2019 · World Psychiatry

We summarized and compared meta-analyses of pharmacological and non-pharmacological interventions targeting physical health outcomes among people with schizophrenia spectrum disorders. Major databases were searched until June 1, 2018. Of…

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Negative / Null Result ReportOpen accessMedicine

An 8-Week Self-Administered At-Home Behavioral Skills-Based Virtual Reality Program for Chronic Low Back Pain: Double-Blind, Randomized, Placebo-Controlled Trial Conducted During COVID-19

Laura García, Brandon Birckhead, Parthasarathy Krishnamurthy et al. · 2021 · Journal of Medical Internet Research

BACKGROUND: Chronic low back pain is the most prevalent chronic pain condition worldwide and access to behavioral pain treatment is limited. Virtual reality (VR) is an immersive technology that may provide effective behavioral therapeutics for chronic pain. OBJECTIVE: We aimed to conduct a double-blind, parallel-arm, single-cohort, remote, randomized placebo-controlled trial for a self-administered behavioral skills-based VR program in community-based individuals with self-reported chronic low back pain during the COVID-19 pandemic. METHODS: A national online convenience sample of individuals

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Negative / Null Result ReportOpen accessMedicine

Covered transjugular intrahepatic portosystemic shunt versus endoscopic therapy + β‐blocker for prevention of variceal rebleeding

Ingrid L. Holster, Eric T.T.L. Tjwa, Adriaan Moelker et al. · 2015 · Hepatology

UNLABELLED: Gastroesophageal variceal bleeding in patients with cirrhosis is associated with significant morbidity and mortality, as well as a high rebleeding risk. Limited data are available on the role of transjugular intrahepatic…

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Negative / Null Result ReportOpen accessMedicine

Facemasks, Hand Hygiene, and Influenza among Young Adults: A Randomized Intervention Trial

Allison E. Aiello, Vanessa Pérez, Rebecca M. Coulborn et al. · 2012 · PLoS ONE

UNLABELLED: Limited vaccine availability and the potential for resistance to antiviral medications have led to calls for establishing the efficacy of non-pharmaceutical measures for mitigating pandemic influenza. Our objective was to examine if the use of face masks and hand hygiene reduced rates of influenza-like illness (ILI) and laboratory-confirmed influenza in the natural setting. A cluster-randomized intervention trial was designed involving 1,178 young adults living in 37 residence houses in 5 university residence halls during the 2007-2008 influenza season. Participants were assigned t

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Negative / Null Result ReportOpen accessMedicine

Immune dysregulation in sepsis: experiences, lessons and perspectives

Min Cao, Guozheng Wang, Jianfeng Xie · 2023 · Cell Death Discovery

Sepsis is a life-threatening organ dysfunction syndrome caused by dysregulated host responses to infection. Not only does sepsis pose a serious hazard to human health, but it also imposes a substantial economic burden on the healthcare system. The cornerstones of current treatment for sepsis remain source control, fluid resuscitation, and rapid administration of antibiotics, etc. To date, no drugs have been approved for treating sepsis, and most clinical trials of potential therapies have failed to reduce mortality. The immune response caused by the pathogen is complex, resulting in a dysregul

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Negative / Null Result ReportOpen accessMedicine

Cognitive Complaints After Breast Cancer Treatments: Examining the Relationship With Neuropsychological Test Performance

Patricia A. Ganz, Lorna Kwan, Steven A. Castellon et al. · 2013 · JNCI Journal of the National Cancer Institute

BACKGROUND: Cognitive complaints are reported frequently after breast cancer treatments. Their association with neuropsychological (NP) test performance is not well-established. METHODS: Early-stage, posttreatment breast cancer patients…

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Negative / Null Result ReportOpen accessMedicine

Genetic variation in transmembrane 6 superfamily member 2 and the risk of nonalcoholic fatty liver disease and histological disease severity

Silvia Sookoian, Gustavo Castaño, Romina Scian et al. · 2014 · Hepatology

UNLABELLED: We explored the role of transmembrane 6 superfamily member 2 (TM6SF2) rs58542926 C/T nonsynonymous (p.Glu167Lys) variant in genetic susceptibility to nonalcoholic fatty liver disease (NAFLD) and disease severity. A total of 361…

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Negative / Null Result ReportOpen accessMedicine

The impact of histology and delivered dose on local control of spinal metastases treated with stereotactic radiosurgery

Yoshiya Yamada, Evangelia Katsoulakis, Ilya Laufer et al. · 2017 · Neurosurgical FOCUS

OBJECTIVE An analysis of factors contributing to durable radiographic control of spinal metastases was undertaken, drawing from a large single-institution database in an attempt to elucidate indications and dose requirements for successful…

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Negative / Null Result ReportOpen accessMedicine

The association between physical activity and risk of mortality is modulated by grip strength and cardiorespiratory fitness: evidence from 498 135 UK-Biobank participants

Carlos Celis‐Morales, Donald M. Lyall, Jana Anderson et al. · 2016 · European Heart Journal

Aims: It is unclear whether the potential benefits of physical activity differ according to level of cardiorespiratory fitness (CRF) or strength. The aim of this study was to determine whether the association between physical activity and…

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Negative / Null Result ReportOpen accessMedicine

Xpert MTB/RIF versus sputum microscopy as the initial diagnostic test for tuberculosis: a cluster-randomised trial embedded in South African roll-out of Xpert MTB/RIF

Gavin Churchyard, Wendy Stevens, L D Mametja et al. · 2015 · The Lancet Global Health

BACKGROUND: In South Africa, sputum smear microscopy has been replaced with Xpert MTB/RIF as the initial diagnostic test for tuberculosis. In a pragmatic parallel cluster-randomised trial, we evaluated the effect on patient and programme…

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Negative / Null Result ReportOpen accessMedicine

Atherogenic index of plasma as predictors for metabolic syndrome, hypertension and diabetes mellitus in Taiwan citizens: a 9-year longitudinal study

Yen‐Wei Li, Tung‐Wei Kao, Pi-Kai Chang et al. · 2021 · Scientific Reports

Deeply involved with dyslipidemia, cardiovascular disease has becoming the leading cause of mortality since the early twentieth century in the modern world. Whose correlation with metabolic syndrome (MetS), hypertension and type 2 diabetes mellitus (T2DM) has been well established. We conducted a 9-year longitudinal study to identify the association between easily measured lipid parameters, future MetS, hypertension and T2DM by gender and age distribution. Divided into three groups by age (young age: < 40, middle age: ≥ 40 and < 65 and old age: ≥ 65), 7670 participants, receiving standard medi

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Negative / Null Result ReportOpen accessMedicine

Awake prone positioning does not reduce the risk of intubation in COVID-19 treated with high-flow nasal oxygen therapy: a multicenter, adjusted cohort study

Carlos Ferrando, Ricard Mellado Artigas, Alfredo Gea et al. · 2020 · Critical Care

BACKGROUND: Awake prone positioning (awake-PP) in non-intubated coronavirus disease 2019 (COVID-19) patients could avoid endotracheal intubation, reduce the use of critical care resources, and improve survival. We aimed to examine whether the combination of high-flow nasal oxygen therapy (HFNO) with awake-PP prevents the need for intubation when compared to HFNO alone. METHODS: Prospective, multicenter, adjusted observational cohort study in consecutive COVID-19 patients with acute respiratory failure (ARF) receiving respiratory support with HFNO from 12 March to 9 June 2020. Patients were cla

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Negative / Null Result ReportOpen accessMedicine

Postoperative Mortality after Liver Resection for Perihilar Cholangiocarcinoma: Development of a Risk Score and Importance of Biliary Drainage of the Future Liver Remnant

Jimme K. Wiggers, Bas Groot Koerkamp, Kasia P. Cieslak et al. · 2016 · Journal of the American College of Surgeons

BACKGROUND: Liver surgery for perihilar cholangiocarcinoma (PHC) is associated with postoperative mortality ranging from 5% to 18%. The aim of this study was to develop a preoperative risk score for postoperative mortality after liver…

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Negative / Null Result ReportOpen accessMedicine

Efficacy of eribulin in women with metastatic breast cancer: a pooled analysis of two phase 3 studies

Chris Twelves, Javier Cortés, Linda T. Vahdat et al. · 2014 · Breast Cancer Research and Treatment

Data from two phase 3 studies of eribulin were pooled in analyses initially requested by the European Medicines Agency to assess whether specific patient subgroups, previously treated with an anthracycline and a taxane, benefited from…

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Negative / Null Result ReportOpen accessMedicine

Effects of Remote Monitoring on Clinical Outcomes and use of Healthcare Resources in Heart Failure Patients with Biventricular Defibrillators: Results of the More-Care Multicentre Randomized Controlled Trial

Giuseppe Boriani, Antoine Da Costa, Aurelio Quesada et al. · 2016 · European Journal of Heart Failure

AIMS: The aim of this study was to evaluate the clinical efficacy and safety of remote monitoring in patients with heart failure implanted with a biventricular defibrillator (CRT-D) with advanced diagnostics. METHODS AND RESULTS: The…

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Negative / Null Result ReportOpen accessMedicine

ADHD and EEG-neurofeedback: a double-blind randomized placebo-controlled feasibility study

Marieke M. Lansbergen, Martine van Dongen‐Boomsma, Jan K. Buitelaar et al. · 2010 · Journal of Neural Transmission

Electroencephalography (EEG)-neurofeedback has been shown to offer therapeutic benefits to patients with attention-deficit/hyperactivity disorder (ADHD) in several, mostly uncontrolled studies. This pilot study is designed to test the…

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Negative / Null Result ReportOpen accessMedicine

Vitamin D and the Athlete: Current Perspectives and New Challenges

Daniel J. Owens, Richard J. Allison, Graeme L. Close · 2018 · Sports Medicine

The last decade has seen a dramatic increase in general interest in and research into vitamin D, with many athletes now taking vitamin D supplements as part of their everyday dietary regimen. The most recognized role of vitamin D is its regulation of calcium homeostasis; there is a strong relationship between vitamin D and bone health in non-athletic individuals. In contrast, data have consistently failed to demonstrate any relationship between serum 25[OH]D and bone health, which may in part be due to the osteogenic stimulus of exercise. Vitamin D may interact with extra-skeletal tissues such

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Negative / Null Result ReportOpen accessMedicine

Associations of specific types of sports and exercise with all-cause and cardiovascular-disease mortality: a cohort study of 80 306 British adults

Pekka Oja, Paul Kelly, Željko Pedišić et al. · 2016 · British Journal of Sports Medicine

BACKGROUND/AIM: Evidence for the long-term health effects of specific sport disciplines is scarce. Therefore, we examined the associations of six different types of sport/exercise with all-cause and cardiovascular disease (CVD) mortality…

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