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Browse the failure-mode index

12,218 real negative results, null findings, and replication failures in Medicine. 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 ReportMedicine

Hemorrhage after Transoral Robotic‐Assisted Surgery

Scott A. Asher, Hilliary N. White, Alexandra E. Kejner et al. · 2013 · Otolaryngology

OBJECTIVE: An increasing number of head and neck surgeons have begun using transoral robotic-assisted surgery. Our objective was to examine the postoperative bleeding complications we have encountered to determine risk factors and to…

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Failed Experiment ReportOpen accessMedicine

African Ancestry and Genetic Risk for Uterine Leiomyomata

Lauren A. Wise, Edward Ruiz-Narváez, Julie R. Palmer et al. · 2012 · American Journal of Epidemiology

Rates of uterine leiomyomata (UL) are 2-3 times higher in African Americans than in European Americans. It is unclear whether inherited factors explain the ethnic disparity. To investigate the presence of risk alleles for UL that are…

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Negative / Null Result ReportOpen accessMedicine

Treatment with bexarotene, a compound that increases apolipoprotein-E, provides no cognitive benefit in mutant APP/PS1 mice

Katherine D. LaClair, Kebreten F. Manaye, Dexter L. Lee et al. · 2013 · Molecular Neurodegeneration

BACKGROUND: Though the precise cause(s) of Alzheimer's disease (AD) remain unknown, there is strong evidence that decreased clearance of β-amyloid (Aβ) from the brain can contribute to the disease. Therapeutic strategies to promote natural Aβ clearance mechanisms, such as the protein apolipoprotein-E (APOE), hold promise for the treatment of AD. The amount of APOE in the brain is regulated by nuclear receptors including retinoid X receptors (RXRs). Drugs that activate RXRs, including bexarotene, can increase APOE and ABCA1 production, and have been shown to decrease the Aβ burden and improve c

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Negative / Null Result ReportOpen accessMedicine

Survival effect of first- and second-line treatments for patients with primary glioblastoma: a cohort study from a prospective registry, 1997-2010

Felice Nava, Irene Tramacere, Veronica Andrea Fittipaldo et al. · 2014 · Neuro-Oncology

BACKGROUND: Prospective follow-up studies of large cohorts of patients with glioblastoma (GBM) are needed to assess the effectiveness of conventional treatments in clinical practice. We report GBM survival data from the Brain Cancer…

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Negative / Null Result ReportOpen accessMedicine

Effects of Background Fluid on the Efficiency of Inactivating Yeast with Non-Thermal Atmospheric Pressure Plasma

Young-Hyo Ryu, Yong-Hee Kim, Jin‐Young Lee et al. · 2013 · PLoS ONE

Non-thermal plasma at atmospheric pressure has been actively applied to sterilization. However, its efficiency for inactivating microorganisms often varies depending on microbial species and environments surrounding the microorganisms. We investigated the influence of environmental factors (surrounding media) on the efficiency of microbial inactivation by plasma using an eukaryotic model microbe, Saccharomyces cerevisiae, to elucidate the mechanisms for differential efficiency of sterilization by plasma. Yeast cells treated with plasma in water showed the most severe damage in viability and ce

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Negative / Null Result ReportMedicine

A Comparison and Cost Analysis of Cranioplasty Techniques

Mirko S. Gilardino, Mihiran Karunanayake, Taghreed Alhumsi et al. · 2015 · Journal of Craniofacial Surgery

BACKGROUND: Cranioplasty can be performed either with gold-standard, autologous bone grafts and osteotomies or alloplastic materials in skeletally mature patients. Recently, custom computer-generated implants (CCGIs) have gained popularity…

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Negative / Null Result ReportMedicine

Comparison of accelerated and conventional corneal collagen cross-linking for progressive keratoconus

Yasin Çınar, Abdullah Kürşat Cingü, Fatih Mehmet Türkçü et al. · 2013 · Cutaneous and Ocular Toxicology

PURPOSE: To compare outcomes of accelerated and conventional corneal cross-linking (CXL) for progressive keratoconus (KC). MATERIALS AND METHODS: Patients were divided into two groups as the accelerated CXL group and the conventional CXL…

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Negative / Null Result ReportOpen accessMedicine

Evaluating pre-pregnancy dietary diversity vs. dietary quality scores as predictors of gestational diabetes and hypertensive disorders of pregnancy

Selma Kronsteiner-Gicevic, Audrey J. Gaskins, Teresa T. Fung et al. · 2018 · PLoS ONE

BACKGROUND: Dietary diversity scores (DDS) are considered as metrics for monitoring the implementation of the UN's Sustainable Development Goals, but they need to be rigorously evaluated. OBJECTIVE: To examine two DDS, the Food Groups Index (FGI), and the Minimum Dietary Diversity-Women (MDD-W), alongside two dietary quality scores, the Alternate Healthy Eating Index (AHEI-2010) and the Prime Diet Quality Score (PDQS), with risks of gestational diabetes mellitus (GDM) and hypertensive disorders of pregnancy (HDPs). DESIGN: The analysis included 21,312 (GDM) and 19,917 (HDPs) singleton births r

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Negative / Null Result ReportOpen accessMedicine

Lineage II of Southeast Asian/American DENV-2 is Associated with a Severe Dengue Outbreak in the Peruvian Amazon

Maya Williams, Sandra V. Mayer, William L. Johnson et al. · 2014 · American Journal of Tropical Medicine and Hygiene

During 2010 and 2011, the Loreto region of Peru experienced a dengue outbreak of unprecedented magnitude and severity for the region. This outbreak coincided with the reappearance of dengue virus-2 (DENV-2) in Loreto after almost 8 years.…

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Negative / Null Result ReportOpen accessMedicine

Significant Differences in Physicochemical Properties of Human Immunoglobulin Kappa and Lambda CDR3 Regions

Catherine Townsend, Julie Laffy, Bryan Wu et al. · 2016 · Frontiers in Immunology

Antibody variable regions are composed of a heavy and a light chain, and in humans, there are two light chain isotypes: kappa and lambda. Despite their importance in receptor editing, the light chain is often overlooked in the antibody literature, with the focus being on the heavy chain complementarity-determining region (CDR)-H3 region. In this paper, we set out to investigate the physicochemical and structural differences between human kappa and lambda light chain CDR regions. We constructed a dataset containing over 29,000 light chain variable region sequences from IgM-transcribing, newly f

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Negative / Null Result ReportOpen accessMedicine

Should we SHIFT our thinking about digoxin? Observations on ivabradine and heart rate reduction in heart failure

Davide Castagno, Mark C. Petrie, Brian Claggett et al. · 2012 · European Heart Journal

AIMS: The importance of heart rate in the pathophysiology of heart failure with reduced LVEF has recently attracted attention. In particular, the findings of the Systolic Heart failure treatment with the I(f) inhibitor ivabradine Trial…

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Negative / Null Result ReportOpen accessMedicine

Effects of acute systemic administration of cannabidiol on sleep-wake cycle in rats

Marcos Hortes Nisihara Chagas, José Alexandre S. Crippa, Antônio Waldo Zuardi et al. · 2013 · Journal of Psychopharmacology

UNLABELLED: Cannabidiol (CBD) is one of the main components of Cannabis sativa and has a wide spectrum of action, including effects in the sleep-wake cycle. OBJECTIVE: The objective of this paper is to assess the effects on sleep of acute…

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Negative / Null Result ReportOpen accessMedicine

Health Related Quality of Life and Psychosocial Correlates among HIV-Infected Adolescent and Young Adult Women in the US

Katherine Andrinopoulos, Gretchen Clum, Debra A. Murphy et al. · 2011 · AIDS Education and Prevention

In this study HIV health-related quality of life (HIV-HRQOL) is examined among 179 behaviorally infected adolescent and young adult women. Modifiable psychosocial variables including depression, stigma, social support, and illness…

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ProtocolOpen accessMedicine

Mesothelioma and Radical Surgery 2 (MARS 2): protocol for a multicentre randomised trial comparing (extended) pleurectomy decortication versus no (extended) pleurectomy decortication for patients with malignant pleural mesothelioma

Eric Lim, Liz Darlison, John Edwards et al. · 2020 · BMJ Open

INTRODUCTION: Mesothelioma remains a lethal cancer. To date, systemic therapy with pemetrexed and a platinum drug remains the only licensed standard of care. As the median survival for patients with mesothelioma is 12.1 months, surgery is an important consideration to improve survival and/or quality of life. Currently, only two surgical trials have been performed which found that neither extensive (extra-pleural pneumonectomy) or limited (partial pleurectomy) surgery improved survival (although there was some evidence of improved quality of life). Therefore, clinicians are now looking to evalu

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Negative / Null Result ReportMedicine

Comparison of ultrasound guidance with the traditional palpation and fluoroscopy method for the common femoral artery puncture

Murat Gedikoğlu, Levent Oğuzkurt, Serkan Gür et al. · 2013 · Catheterization and Cardiovascular Interventions

OBJECTIVES: To compare the success and complication rates of ultrasound-guided or palpation-guided punctures of the common femoral artery in a prospective randomized study. BACKGROUND: Percutaneous femoral arterial access is sometimes…

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Negative / Null Result ReportOpen accessMedicine

Maternal sleep-disordered breathing and the risk of delivering small for gestational age infants: a prospective cohort study

Sushmita Pamidi, Isabelle Marc, Gabrielle Simoneau et al. · 2016 · Thorax

OBJECTIVE: It is unclear whether objectively measured maternal sleep-disordered breathing (SDB) leads to poor fetal outcomes. In this study, we prospectively assessed whether polysomnography-based diagnosis of SDB in the third trimester is…

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Failed Experiment ReportOpen accessMedicine

Moving beyond anti-amyloid therapy for the prevention and treatment of Alzheimer’s disease

Michael A. Castello, John D. Jeppson, Salvador Soriano · 2014 · BMC Neurology

BACKGROUND: High-profile Phase 3 clinical trials of bapineuzumab and solanezumab, antibodies targeted at amyloid-beta (Aβ) removal, have failed to meet their primary endpoints. Neither drug improves clinical outcomes in patients with late onset AD, joining a long list of unsuccessful attempts to treat AD with anti-amyloid therapies. DISCUSSION: These therapies are based on the assumption that Aβ accumulation is the primary pathogenic trigger of AD. Current evidence suggests that Aβ may actually accumulate as part of an adaptive response to long-term chronic brain stress stimuli that would make

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Negative / Null Result ReportMedicine

Efficacy and safety of mirabegron for the treatment of neurogenic detrusor overactivity—Prospective, randomized, double‐blind, placebo‐controlled study

Jan Krhút, Vladimír Borovička, Karolína Bílková et al. · 2018 · Neurourology and Urodynamics

AIMS: To assess the efficacy and safety of mirabegron in the treatment of neurogenic detrusor overactivity. METHODS: This prospective, multicenter, randomized, double-blind, placebo-controlled study was conducted in three tertiary centers,…

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Negative / Null Result ReportOpen accessMedicine

Anti-Angiotensin II Type 1 Receptor and Anti-Endothelial Cell Antibodies: A Cross-Sectional Analysis of Pathological Findings in Allograft Biopsies

Mary Carmelle Philogene, Serena M. Bagnasco, Edward S. Kraus et al. · 2016 · Transplantation

BACKGROUND: This is a cross-sectional study designed to evaluate the histologic characteristics of graft injury in the presence of anti-angiotensin II type 1 receptor antibody (AT1R-Ab) and anti-endothelial cell antibody (AECA). METHODS:…

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Negative / Null Result ReportOpen accessMedicine

All-Cause Mortality in Patients With Diabetes Under Treatment With Dapagliflozin: A Population-Based, Open-Cohort Study in The Health Improvement Network Database

Konstantinos A. Toulis, Brian H Willis, Tom Marshall et al. · 2017 · The Journal of Clinical Endocrinology & Metabolism

Context: Empagliflozin was found to decrease mortality in patients with type 2 diabetes mellitus (T2DM) and a prior cardiovascular disease (CVD) event. Objectives: To establish whether these benefits can be replicated in a real-world…

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Negative / Null Result ReportOpen accessMedicine

Systemic Tolerance Mediated by Melanoma Brain Tumors Is Reversible by Radiotherapy and Vaccination

Christopher M. Jackson, Christina M. Kochel, Christopher J. Nirschl et al. · 2015 · Clinical Cancer Research

PURPOSE: Immune responses to antigens originating in the central nervous system (CNS) are generally attenuated, as collateral damage can have devastating consequences. The significance of this finding for the efficacy of tumor-targeted…

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Negative / Null Result ReportOpen accessMedicine

The Effect of Remote Ischaemic Preconditioning on Myocardial Injury in Patients Undergoing Off-Pump Coronary Artery Bypass Graft Surgery

Daqing Hong, Jeong Jin Min, Jeongwon Kim et al. · 2010 · Anaesthesia and Intensive Care

In several recent clinical trials on cardiac surgery patients, remote ischaemic preconditioning (RIPC) showed a powerful myocardial protective effect. However the effect of RIPC has not been studied in patients undergoing off-pump coronary…

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Negative / Null Result ReportOpen accessMedicine

Distinguishing the Central Drive to Tremor in Parkinson's Disease and Essential Tremor

John‐Stuart Brittain, Hayriye Cagnan, Arpan R. Mehta et al. · 2015 · Journal of Neuroscience

Parkinson's disease (PD) and essential tremor (ET) are the two most common movement disorders. Both have been associated with similar patterns of network activation leading to the suggestion that they may result from similar network dysfunction, specifically involving the cerebellum. Here, we demonstrate that parkinsonian tremors and ETs result from distinct patterns of interactions between neural oscillators. These patterns are reflected in the tremors' derived frequency tolerance, a novel measure readily attainable from bedside accelerometry. Frequency tolerance characterizes the temporal ev

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Negative / Null Result ReportMedicine

Diagnostic and prognostic value of presepsin vs. established biomarkers in critically ill patients with sepsis or systemic inflammatory response syndrome

Helena Brodská, J Valenta, Květa Pelinková et al. · 2017 · Clinical Chemistry and Laboratory Medicine (CCLM)

BACKGROUND: Inflammatory biomarkers may aid to distinguish between systemic inflammatory response syndrome (SIRS) vs. sepsis. We tested the hypotheses that (1) presepsin, a novel biomarker, can distinguish between SIRS and sepsis, and (2)…

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