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21,309 real negative results, null findings, and replication failures. 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

Subclinical atherosclerosis assessed by cardio-ankle vascular index and carotid intima-media thickness in people living with HIV receiving integrase inhibitor-based tenofovir regimens.

Vatan A, Karabay O, Moralı H et al. · 2026 · BMC infectious diseases

Background Tenofovir alafenamide (TAF) is widely used in antiretroviral therapy due to its improved renal and bone safety compared to tenofovir disoproxil fumarate (TDF). However, concerns remain regarding its potential metabolic effects…

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Negative / Null Result ReportMedicine

The Drug-Coated Balloon and Primary Patency in Endovascular Therapy for Femoropopliteal Lesions With "Black Rock" Nodular Calcification.

Shikama T, Otaki Y, Kinoshita D et al. · 2026 · Journal of endovascular therapy : an official journal of the International Society of Endovascular Specialists

Objective Nodular calcifications occupying the lumen in the femoropopliteal artery, known as "Black Rock (BR)" lesions, are associated with poor patency. We focused on the drug-coated balloon (DCB) and examined whether the impact of final…

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Negative / Null Result ReportOpen accessMedicine

No-touch versus conventional radiofrequency ablation for treating solitary recurrent hepatocellular carcinoma ≤ 3 cm: a retrospective cohort study.

Wu G, Ou X, Zou M et al. · 2026 · Journal of cancer research and clinical oncology

OBJECTIVE: This study aimed to compare the outcomes of no-touch radiofrequency ablation (NT-RFA) and conventional RFA (C-RFA) in the treatment of solitary recurrent hepatocellular carcinoma (rHCC) ≤ 3 cm. METHODS: 255 patients with rHCC…

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Negative / Null Result ReportOpen accessTechnology

Effects of Allicin Supplementation on the Mechanical and Viscoelastic Properties of the Tibia in Bovans Brown Hens

Anna Skic, Zbigniew Stropek, Kamil Drabik et al. · 2026 · Applied Sciences

Bone tissue exhibits viscoelastic behavior, and stress relaxation analysis provides valuable insight into its time-dependent mechanical performance. This study aimed to evaluate the effects of allicin supplementation on the mechanical and viscoelastic properties of tibial bone in Bovans Brown laying hens. Tibiae of 68-week-old hens were subjected to three-point bending tests to determine quasi-static mechanical properties, as well as stress relaxation tests conducted at three deformation velocities (0.1, 1, and 10 mm/s). Stress relaxation behavior was described using a five-parameter generaliz

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Negative / Null Result ReportOpen accessTherapeutics. Pharmacology

A Pilot Study on the Impact of Cranberry and Ascorbic Acid Supplementation on the Urinary Microbiome of Healthy Women: A Randomized Controlled Trial

Alina Nussbaumer-Pröll, Bela Hausmann, Maria Weber et al. · 2025 · Antibiotics

Background : The collection of microorganisms that colonize the human genital and urinary tract is referred to as the genitourinary microbiome. Urinary tract infections (UTIs), which predominantly affect women, are linked to alterations in the genitourinary microbiome. Cranberries ( Vaccinium oxycoccos ), rich in proanthocyanidins, and ascorbic acid (vitamin C), known for their urinary acidification properties, are commonly used for UTI prevention. However, their effects on the genitourinary microbiome remain inadequately characterized. This pilot study assesses the genitourinary microbiome co

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Negative / Null Result ReportOpen accessAgriculture

Comparative study on quality parameters of dry-cured beaver (Castor fiber) and nutria (Myocastor coypus) sausages

Jan Slováček, Šárka Nedomová, Markéta Janík Piechowiczová et al. · 2024 · Czech Journal of Food Sciences

The aim of the study was to define and compare the quality properties of dry-cured heat-treated meat products from the meat of free-living semi-aquatic wildlife species. Eurasian beaver (Castor fiber) and nutria (Myocastor coypus) are wild animals whose presence in the countryside is regulated in the Czech Republic. Basic chemical, microbiological, sensory analyses, and instrumental measurements of the colour and texture of dry-cured sausages (pork, as a control group with 51% lean pork and experimental groups with 51% lean beaver and nutria meat in fresh state) were performed. There were no s

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

Frequency of MYD88 L256P mutation and its correlation with clinico-hematological profile in mature B-cell neoplasm

Raja Shekhar, Shano Naseem, Jogeshwar Binota et al. · 2021 · Hematology/Oncology and Stem Cell Therapy

Objective/background: B-cell neoplasms are clonal tumors of B cells at various stages of maturation, including diffuse large B-cell lymphoma (DLBCL), chronic lymphocytic lymphoma (CLL), Burkitt lymphoma (BL), lymphoplasmacytic lymphoma (LPL)/Waldenström’s macroglob- ulinemia (WM), splenic marginal zone lymphoma (SMZL), nodal marginal zone lymphoma (NMZL), mantle cell lymphoma (MCL), follicular lymphoma (FL), and hairy cell leukemia (HCL). In this study, we analyzed the frequency of MYD88 L265P mutation and its correlation with clinico-hematological profile in mature B-cell neoplasms. Methods:

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Negative / Null Result ReportOpen accessDiseases of the blood and blood-forming organs

Validation of a pulmonary embolism risk assessment model in gynecological inpatients

Zhen-Yi Jin, Chun-Min Li, Hong Qu et al. · 2024 · Thrombosis Journal

Abstract Objective To compare the predictive efficacy of the PADUA and Caprini models for pulmonary embolism (PE) in gynecological inpatients, analyze the risk factors for PE, and validate whether both models can effectively predict mortality rates. Methods A total of 355 gynecological inpatients who underwent computed tomography pulmonary angiography (CTPA) were included in the retrospective analysis. The comparative assessment of the predictive capabilities for PE between the PADUA and Caprini was carried out using receiver operating characteristic (ROC) curves. Logistic regression analysis

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Negative / Null Result ReportOpen accessAstrophysics

Systematics in the Cepheid and TRGB Distance Scales: Metallicity Sensitivity of the Wesenheit Leavitt Law

Barry F. Madore, Wendy L. Freedman · 2024 · The Astrophysical Journal

Using an updated and significantly augmented sample of Cepheid and tip of the red giant branch (TRGB) distances to 28 nearby spiral and irregular galaxies, covering a wide range of metallicities, we have searched for evidence of a correlation of the zero-point of the Cepheid period–luminosity relation with H ii region (gas-phase) metallicities. Our analysis, for the 21 galaxies closer than 12.5 Mpc, results in the following conclusions: (1) The zero-points of the Cepheid and TRGB distance scales are in remarkably good agreement, with the mean offset in the zero-points of the most nearby distan

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Negative / Null Result ReportOpen accessOphthalmology

Comparison of 12-month therapeutic effect of conbercept and ranibizumab for diabetic macular edema: a real-life clinical practice study

Yule Xu, Ao Rong, Wei Xu et al. · 2017 · BMC Ophthalmology

Abstract Background To compare the efficacy of intravitreal conbercept and ranibizumab in the treatment of diabetic macular edema (DME) in a real-life clinical practice. Methods This was a retrospective study. Among 62 Chinese patients with DME, 32 patients (36 eyes) received intravitreal conbercept (IVC) injections and 30 patients (32 eyes) received intravitreal ranibizumab (IVR) injections, once a month for 3 months followed by as needed therapy. All participants had at least 12 months of follow-up. We compared the changes in best-corrected visual acuity (BCVA) letter score and central retin

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Negative / Null Result ReportOpen accessSpecial aspects of education

الحالة المزاجية المميزة للتلميذات ذوات صعوبات التعلم في المرحلة الابتدائية The Temperamental Status that Distinguishes Female Students with Learning Disabilities at Elementary School

نسرين أحمد الضبيب, زيدان أحمد السرطاوي · 2016 · مجلة التربیة الخاصة والتأهیل

هدفت الدراسة الحالية إلى التعرف على الحالة المزاجية المميزة للتلميذات ذوات صعوبات التعلم في المرحلة الابتدائية، وإلى التعرف على الفروق الدالة إحصائياً في الحالة المزاجية بين التلميذات ذوات صعوبات التعلم، والتلميذات العاديات. وتکونت عينة الدراسة من )٣٠٢) تلميذة، من الصفوف الابتدائية الثلاثة العليا، بواقع )١٤٢) تلميذة من ذوات صعوبات التعلم، و(١٦٠) تلميذة عادية. واستخدم اختبار الحالة المزاجية للأطفال، لطنطاوي، وعجلان (١٩٩٥)، کأداة للدراسة. توصلت النتائج إلى أن أکثر أبعاد الحالة المزاجية لذوات صعوبات التعلم إيجابية بحسب قيم المتوسط الأعلى على التوالي هي: حدة رد الفعل، الاندفاع، مستوى النشاط، الاقت

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

Functional outcomes and subjective recovery of jumping to conclusions in schizophrenia

Seiichi Watanabe, Takamichi Taniguchi, Motoko Sugihara · 2021 · Schizophrenia Research: Cognition

This study investigated the effects of the bias known as jumping to conclusions (JTC) on objective functional outcomes as well as subjective assessments of quality of life (QoL) and personal recovery among a sample of patients diagnosed with schizophrenia. Specifically, this study assessed the variables of JTC, psychiatric symptoms, neurocognitive functioning, objective interpersonal and daily activities, vocational domains, subjective QoL, and personal recovery among 94 participants. Results showed that those in the JTC group had significantly lower neurocognitive and functional outcomes (mod

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Negative / Null Result ReportOpen accessMedicine

Optic Nerve Head and Retinal Nerve Fiber Layer Analysis in Ocular Hypertension and Early-Stage Glucoma Using Spectral-Domain Optical Coherence Tomography Copernicus

Nilgün Solmaz, Onur Yaya, Feyza Önder · 2014 · Türk Oftalmoloji Dergisi

Objectives: Evaluation of structural alterations of the optic nerve head (ONH) and the retinal nerve fiber layer (RNFL) in patients with ocular hypertension (OHT) and early-stage glaucoma and assessment of the discriminatory diagnostic performance of spectral-domain optical coherence tomography (SD-OCT) Copernicus (Optopol Technology S.A.). Materials and Methods: This study included 59 eyes of a total of 59 patients, 29 of whom were diagnosed with OHT (Group 1) and 30 with early-stage glaucoma (Group 2). The differentiation of early-stage glaucoma and OHT was carried out on the basis of standa

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Negative / Null Result ReportOpen accessScience (General)

Determination of cyberloafing level of speech and Language Therapy Department students

Fenise Selin Karali, Samet Tosun, Meltem Şen-Aksüt et al. · 2024 · Heliyon

Cyberloafing is the use of (e.g. smartphones, tablets, laptops, and the Internet) for purposes other than work related reasons during work hours. Although cyberloafing in the workplace has been widely investigated, there is relatively a small number of studies on cyberloafing behaviors in educational settings, which refer to students' tendencies to use technology for non-class-related purposes during lectures. The goal of the current study is to determine how frequently and for what purposes speech and language therapy (SLT) students at Biruni University engage in cyberloafing during lectures.

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Negative / Null Result ReportOpen accessGynecology and obstetrics

The effect of combined herbal capsules (Menohelp®) on early symptoms of menopause: a randomized double-blind placebo-controlled trial

Fariba Mousavi, Sakineh Mohammad-Alizadeh-Charandabi, Mojgan Mirgafourvand et al. · 2023 · Majallah-i Zanān, Māmā̓ī va Nāzā̓ī-i Īrān

Introduction: Early symptoms of menopause are very common and often very bothersome. Considering the increasing number of women experiencing these symptoms in the world and Iran, there is a growing need to use methods to reduce these symptoms. Therefore, this study was performed with aim to determine the effect of the combined herbal capsules (Menohelp) on reducing the early symptoms of menopause, number and intensity of hot flashes (primary outcomes), and improving sleep quality and quality of life (secondary outcomes) in menopausal women. Methods: In this double-blind trial in Tabriz, 100 wo

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Negative / Null Result ReportOpen accessDentistry

In Vitro Evaluation of the Effect of Different Sandblasting Times on the Bond Strength of Feldspathic Porcelain to Composite Resin

Ebrahim Amin Salehi, Haleh Heshmat, Elham Moravej Salehi et al. · 2013 · Journal of Islamic Dental Association of Iran

Background and Aim: Intraoral repair of fractured porcelain is an acceptable method to avoid replacement and therefore saving time and cost. The purpose of this study was to determine the in-vitro shear bond strengths of composite resin to feldspathic porcelain after different durations of sandblasting and to compare the effect of sandblasting with that of hydrofluoric acid (HF ). Materials and Methods : In this in-vitro study, 40 porcelain disks were fabricated and randomly divided into 4 groups (n=10). Porcelain surface in group 1 was etched with 9.5% HF for 2 minutes. Groups 2, 3 and 4 were

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Negative / Null Result ReportOpen accessMedicine

Effect of Racking Systems Versus Enriched Terraria on Fecal Glucocorticoid Metabolites in Four Species of Captive Snakes: A Pilot Study.

Olvera-Maneu S, Regidor M, Serres-Corral P et al. · 2026 · Animals : an open access journal from MDPI

Fecal glucocorticoid metabolites (FGM) are widely used to assess hypothalamic-pituitary-adrenal (HPA) activity in vertebrates, but their applicability to reptiles, and more specifically to snakes, remains poorly explored. The objective of…

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Negative / Null Result ReportOpen accessNursing

Medical Rehabilitation of Children With Idiopathic Scoliosis: Monotherapy or Combined Therapy. A Systematic Literature Review

Nora Kasparaitytė, Juozas Raistenskis, Lina Budrienė et al. · 2025 · Reabilitacijos Mokslai: Slauga, Kineziterapija, Ergoterapija

Background. Idiopathic scoliosis is among the most common spinal disorders diagnosed in 1–3% of children and adolescents. Treatment choice is related to disease severity, with a Cobb angle of 20–40°, a corrective brace or phys­iotherapy can stop its progression. However, insufficient research has shown whether combined treatment is better than monotherapy. Aim. To evaluate the effect of combining bracing and physiotherapy to reduce spinal deformity, improve quality of life and lung function, and compare the results with those of monotherapy. Determine the optimal duration of combined rehabilit

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Negative / Null Result ReportOpen accessPlant culture

Culture of Steinernema glaseri on three solid media and their virulence against Galleria mellonella larvae

Carlos I. Cortés-Martínez, Adriana Ines Rodríguez-Hernández, Ma del Rocío López-Cuellar et al. · 2023 · Plant Protection Science

Steinernema glaseri is a potential biocontrol agent against white grubs of the Phyllophaga spp. complex; however, its suitability for in vitro multiplication has been scarcely investigated. In this study, the effects of the surface culture of NJ-43 strain with its symbiotic bacteria Xenorhabdus poinarii on egg-yolk agar (P2), chicken-liver agar and nutrient meat-peptone (MP) agar on infective juvenile (IJ) productivity and their virulence against Galleria mellonella larvae were investigated. The bacteria on the surface of the agar were first incubated in darkness at 30 °C for 54-102 h, and the

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Negative / Null Result ReportOpen accessMedicine

Impact of Cross-Sectoral Video Consultation on Perceived Care Coordination and Information Satisfaction in Cancer Care: Randomized Controlled Trial

Fereshteh Baygi, Theis Bitz Trabjerg, Lars Henrik Jensen et al. · 2025 · JMIR Formative Research

BackgroundEnhancing care coordination and sharing information in cancer care improves patient experiences by promoting clarity and satisfaction. ObjectiveThis study aims to assess the impact of cross-sectoral video consultation on patient perceptions of care coordination and satisfaction with received information compared to usual care. MethodsThis study presents secondary outcomes on patient perceptions of care coordination and satisfaction with received information from a 7-month follow-up of the Partnership Project. In this randomized controlled trial, patients with cancer were allocated to

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Negative / Null Result ReportOpen accessVeterinary medicine

Combination Therapeutic Effect of Antibacterial and Antiviral Agents on Feline Chronic Gingivostomatitis Nonbounded to Prior Tooth Extraction Confirmed by Physical Signs and Clinical Biomarkers

Masato Katayama, Yukina Uemura · 2026 · Veterinary Sciences

Background: Feline chronic gingivostomatitis (FCGS) is refractory stomatitis in cats. The cure rate of tooth extraction selected as a primary surgical treatment is insufficient. Methods: 52 FCGS-suspected cats, including 22 tooth-extracted and 30 unextracted cats, were studied. Commercially available antiviral and antibacterial agents were orally administered as initial treatment, followed by the antiviral agent solely as maintenance therapy. We examined the influence of prior tooth extraction on the therapeutic efficacy of these two drugs by analyzing changes in some physical signs and clinic

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Negative / Null Result ReportOpen accessPublic aspects of medicine

Recursive Path Model for Health Literacy: The Effect of Social Support and Geographical Residence

Éva Bíró, Ferenc Vincze, Gabriella Mátyás et al. · 2021 · Frontiers in Public Health

Background: The public health relevance of health literacy is highlighted by the fact that its higher levels can improve health outcomes and reduce health inequities. In order to design effective interventions for improving health literacy, the relationship between health literacy and other factors such as sociodemographic variables, subjective health and social support must be understood.Objective: Our aim was to test a socioecological model of the determinants of health literacy with a special focus on the effect of residence. Our study investigated geographical differences regarding the lev

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Negative / Null Result ReportOpen accessSurgery

Radiofrequency Ablation for 110 Malignant Liver Tumours: Preliminary Results on Percutaneous and Surgical Approaches

J. Wong, K.F. Lee, P.S.F. Lee et al. · 2009 · Asian Journal of Surgery

Radiofrequency ablation (RFA) has been widely applied for the treatment of hepatocellular carcinoma and liver metastases. The reported mortality and morbidity rates are low. The aim of this study is to evaluate the safety and efficacy of RFA, and compare the results performed percutaneously versus surgically. Patients and Methods: From 2003 to 2006, 79 patients with hepatic malignancies (59 hepatocellular carcinoma, 20 liver metastases) with a total of 110 lesions underwent RFA in our centre. Post-ablation assessment by CT scan was performed in all patients at 1-, 3- and 6-month intervals. Pos

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Negative / Null Result ReportOpen accessSpecialties of internal medicine

Recurrence rate in patients with acute immune thrombocytopenic purpura in Ahvaz, southwest of Iran: Corticosteroids versus intravenous immunoglobulin

Ahmad Safapour, Arash Alghasi, Farhad Abolnezhadian · 2021 · Journal of Preventive Epidemiology

Introduction: Immune thrombocytopenic purpura (ITP) is known as the most important cause of sudden drop in platelet count among children. The acute form of unexpected drop in platelet count in children calls for treatment with medications such as corticosteroids, intravenous immunoglobulin (IVIg), and Rho(D) immunoglobulin (anti-DIG). Most of the previous studies have accordingly compared short-term therapeutic outcomes of steroids with those of IVIg. In some cases, IVIg has led to better results. However, there are few studies on the long-term treatment effects of both medicine categories. Ob

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Negative / Null Result ReportOpen accessMedicine

Association between Chewing Side Preference and Dental Caries among Deciduous, Mixed and Permanent Dentition

Ullal Anand Nayak, Reena Sharma, Nilotpol Kashyap et al. · 2016 · Journal of Clinical and Diagnostic Research

Introduction: Chewing Side Preference (CSP) is said to occur when mastication is recognized exclusively/consistently or predominantly on the same side of the jaw. It can be assessed by using the direct method - visual observation and indirect methods by electric programs, such as cinematography, kinetography and computerized electromyography. Aim: The present study was aimed at evaluating the prevalence of CSP in deciduous, mixed and permanent dentitions and relating its association with dental caries. Materials and Methods: In a cross-sectional observational study, 240 school going children a

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

Reproductive Cancer Risk Factors in Women With Myotonic Dystrophy (DM): Survey Data From the US and UK DM Registries

Cecilia Higgs, James E. Hilbert, Libby Wood et al. · 2019 · Frontiers in Neurology

Introduction: Recent evidence demonstrates that women with myotonic dystrophy type 1 are at increased risk of reproductive organ tumors. However, studies of reproductive cancer risk factors in those patients are lacking.Methods: Using questionnaires, we collected and analyzed personal history information related to cancer risk factors from women enrolled in a UK and US registry for myotonic dystrophy (dystrophia myotonica; DM) patients.Results: The survey was completed by 242 DM type 1 (DM1) and 44 DM type 2 (DM2) women enrolled in the UK Registry (N = 124) and the US National Registry (N = 16

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Negative / Null Result ReportOpen accessDentistry

Marginal gap of zirconia and lithium disilicate frameworks produced by the CAD-CAM technique through a comparator microscope – in vitro analysis

Ellen Christine Rodrigues Abreu, Vicente Colussi Ferreira , Karina Andrea Novaes Olivieri et al. · 2024 · Brazilian Dental Science

Objective: The aim of this study was to evaluate the marginal gap of frameworks produced using the CAD-CAM system, from zirconia and lithium disilicate blocks, adapted to a tooth preparation and a gypsum die. Material and Methods: For this study, a human first molar tooth was used as a master model with a full crown preparation. It was molded 20 times to obtain the gypsum die and randomly divided into 2 groups (n=10) for the fabrication of zirconia and lithium disilicate frameworks. The frameworks were made using pre-sintered zirconia blocks and lithium disilicate blocks, both CAD-CAM systems.

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Negative / Null Result ReportOpen accessSports medicine

Comparação de marcadores plasmáticos de dano muscular após a realização de exercício de força com e sem oclusão vascular em homens fisicamente ativos e saudáveis

Murilo Esteves Nogueira, Gabriela Oliveira Baptista, João Paulo Vello Marqueti et al. · 2018 · Revista Brasileira de Prescrição e Fisiologia do Exercício

O objetivo principal do treinamento resistido com pesos é promover a quebra da homeostase do organismo. Desde que dentro dos limites fisiológicos, o organismo gera o fenômeno da supercompensação, alcançando um novo nível de aptidão física. Diversas técnicas são usadas para alcançar o condicionamento físico, e a oclusão vascular (kaatsu training) surge como uma opção permeada por benefícios para sedentários e portadores de patologias, mas ainda com poucas evidências para a população treinada. O objetivo desse trabalho foi comparar a magnitude de dano muscular no exercício resistido com e sem oc

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