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Failure-mode index

Search what already failed

A searchable index of real negative results, null findings, and replication failures from the published literature — so you can learn what didn't work before repeating it.

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record (title, authors, DOI) compiled from open scholarly databases, with the abstract shown in full only where the paper is openly licensed (e.g. Creative Commons); otherwise a short excerpt is shown for reference under fair use. WASTE classifies each work by failure type; classifications are automated and approximate.

19866 results in Negative / Null Result Report · page 411 of 663

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

Longitudinal evaluation of olfactory function in individuals with Gaucher disease and GBA1 mutation carriers with and without Parkinson's disease

Grisel J. Lopez, Jens Lichtenberg, Nahid Tayebi et al. · 2022 · Frontiers in Neurology

ObjectiveBiallelic mutations in GBA1, which encodes the lysosomal enzyme glucocerebrosidase, cause the lysosomal storage disorder Gaucher disease (GD). In addition, mutations in GBA1 are the most common genetic risk factor for future development of Parkinson's disease (PD). However, most mutation carriers will never develop parkinsonism. Olfactory dysfunction is often a prodromal symptom in patients with PD, appearing many years prior to motor dysfunction. The purpose of this study was to assess olfactory function longitudinally in individuals with and without parkinsonism who carry at least o

View details →DOI: 10.3389/fneur.2022.1039214
Negative / Null Result ReportOpen accessNeoplasms. Tumors. Oncology. Including cancer and carcinogens

Learning curve of transanal minimally invasive surgery for rectal neoplasm

Xingwang Li, Xingwang Li, Shaoqing Guo et al. · 2025 · Frontiers in Oncology

ObjectivesThe field of view through transanal endoscopic provides new treatment approaches for solving complex clinical problems. TAMIS belongs to single-port endoscopic surgery, and the operation is complex. Analyzing the learning curve of TAMIS aims to facilitate its better clinical promotion.MethodsA retrospective cohort study analyzed the clinical data of 58 patients who underwent TAMIS by the same surgeon from January 2018 to October 2024. The learning curve of TAMIS was obtained using the cumulative sum (CUSUM) analysis, and the optimal number of surgeries was determined based on the pea

View details →DOI: 10.3389/fonc.2025.1545589
Negative / Null Result ReportOpen accessOrthopedic surgery

[Translated article] Analysis of the results of anterior cruciate ligament reconstruction associated with high-resistance tape reinforcement (ultra-high molecular weight polyethylene braided material)

A.N. Toro-Ibarguen, E. Sánchez Benito, J.M. Cortés Villar · 2026 · Revista Española de Cirugía Ortopédica y Traumatología

Background and objective: The primary objective is to evaluate the clinical and functional outcomes of tape reinforcement in anterior cruciate ligament (ACL) reconstructions, recording complications, as well as the rate of reinterventions and graft failure. Materials and methods: Retrospective analysis of ACL reconstructions with hamstring (HS) autograft that were reinforced with high-strength tape. We included patients in whom we obtained a graft of HS <8 mm or ≥8 mm of poor quality. Age, sex, body mass index (BMI), and previous activity were recorded. Clinical and functional evaluation were

View details →DOI: 10.1016/j.recot.2025.11.004
Negative / Null Result ReportOpen accessMedicine (General)

Craniofacial Characteristics of Thalassemia Major Patients

Sacide Karakas, Ayfer Metin Tellioglu, Mehmet Bilgin et al. · 2019 · Eurasian Journal of Medicine

Abstract Objective: Thalassemias major are the most common autosomal recessive disorders; they are characterized by anomalies in the synthesis of the beta chains of hemoglobin and are often associated with varying degrees of craniofacial anomalies. The purpose of this study was to evaluate the craniofacial dimensions of β-thalassemia patients and to identify differences by comparing them to those of a control group. Materials and Methods: The study comprised 43 thalassemia major patients and 26 age- and sex- matched healthy control subjects. Anthropometric measurements were performed in six di

View details →DOI: 10.5152/eurasianjmed.2016.150013
Negative / Null Result ReportOpen accessScience

Long bone cross-sectional geometric properties of Later Stone Age foragers and herder–foragers

Michelle E. Cameron, Susan Pfeiffer · 2014 · South African Journal of Science

Diaphyseal cross-sectional geometry can be used to infer activity patterns in archaeological populations. We examined the cross-sectional geometric (CSG) properties of adult Later Stone Age (LSA) herder–forager long bones from the inland lower Orange River Valley of South Africa (n=5 m, 13 f). We then compared their CSG properties to LSA forager adults from the coastal fynbos (n=23 m, 14 f) and forest (n=17 m, 19 f) regions, building on a previous report (Stock and Pfeiffer, 2004). The periosteal mould method was used to quantify total subperiosteal area, torsional strength, bilateral asymmetr

View details →DOI: 10.1590/sajs.2014/20130369
Negative / Null Result ReportOpen accessMedicine

Is pomegranate peels infusion effective for disinfection of toothbrushes?

Priscila Lima de Luna FREIRE, Priscila Hernández CAMPOS, Fabíola Galbiatti CARVALHO et al. · Revista de Odontologia da UNESP

Abstract Introduction Methods of decontamination or sanitization of toothbrushes have been questioned. Objective This study assessed the effectiveness of pomegranate peels infusion as a disinfectant of toothbrushes against Streptococcus mutans. Material and method A sample of 16 schoolchildren aged between 7 and 9 years performed brushing 5 days/week, with a careful brushing once a day. After each day of brushing, the toothbrushes were washed and sprayed with one disinfectant solution. This procedure was repeated for 4 weeks using one of the different solutions per week: distilled water (G1; n

View details →DOI: 10.1590/1807-2577.01416
Negative / Null Result ReportOpen accessGeriatrics

Postoperative Complications of Hip Fractures Patients on Chronic Coumadin: A Comparison Based on Operative International Normalized Ratio

Michael S. Kain, David Saper, Kyle Lybrand et al. · 2020 · Geriatrics

In current clinical practice, orthopedic surgeons often delay the surgery intervention on geriatric hip fracture patients to optimize the international normalized ratio (INR), in order to decrease the risk of postoperative hematological complications. However, some evidence suggests that full reversal protocols may not be necessary, especially for patients with prior thromboembolic history. Our study aims to compare the surgical outcomes of patients with normal versus elevated INR values. We conducted a retrospective chart review on 217 patients who underwent surgeries on hip fractures at two

View details →DOI: 10.3390/geriatrics5030043
Negative / Null Result ReportOpen accessAnimal culture

Effects of the physical form of starter feed on the intake, performance, and health of female Holstein calves

Í.R.R. Castro, G.B.C. Leite, I.F. Carrari et al. · 2025 · Animal

Available literature on the effect of various physical forms of starter feed (PFSF) on calf performance is conflicting. Thus, this study aimed to investigate the effect of the PFSF on feed intake, growth performance, blood metabolites, and the health of dairy calves. Twenty-four female Holstein calves (5-d-old; 40.4 ± 3.86 kg BW; mean ± SD) were used in a completely randomized block design. Calves were individually housed and randomly assigned to the treatments (n = 12 calves/treatment): (1) textured starter feed (TSF, a mix of pelleted ingredients and whole-kernel corn) and (2) pelleted start

View details →DOI: 10.1016/j.animal.2024.101400
Negative / Null Result ReportOpen accessMedicine

Contribution of model organism phenotypes to the computational identification of human disease genes

Sarah M. Alghamdi, Paul N. Schofield, Robert Hoehndorf · 2022 · Disease Models & Mechanisms

Computing phenotypic similarity helps identify new disease genes and diagnose rare diseases. Genotype–phenotype data from orthologous genes in model organisms can compensate for lack of human data and increase genome coverage. In the past decade, cross-species phenotype comparisons have proven valuble, and several ontologies have been developed for this purpose. The relative contribution of different model organisms to computational identification of disease-associated genes is not fully explored. We used phenotype ontologies to semantically relate phenotypes resulting from loss-of-function mu

View details →DOI: 10.1242/dmm.049441
Negative / Null Result ReportOpen accessMedical physics. Medical radiology. Nuclear medicine

Phase I and II trial on infusional 5-fluorouracil and gefitinib in combination with preoperative radiotherapy in rectal cancer: 10-years median follow-up

Maria Antonietta Gambacorta, Antonino De Paoli, Marco Lupattelli et al. · 2018 · Clinical and Translational Radiation Oncology

Purpose: The aim of this study is to evaluate the long term survival of the addition of gefitinib to chemoradiotherapy (CRT) in locally advanced rectal cancer (LARC). Methods and materials: This previously published multicentre, open-label, phase I-II study, enrolled patients (pts) with LARC to receive CRT with concurrent 5-fluorouracil continuous intravenous infusion and a dose escalation of orally administered gefitinib, followed 6–8 weeks later by surgery. An intra-operative radiotherapy boost of 10 Gy was planned. Adjuvant chemotherapy was administrated in ypN1-2 pts. After a median f/u of

View details →DOI: 10.1016/j.ctro.2018.02.003
Negative / Null Result ReportOpen accessNeoplasms. Tumors. Oncology. Including cancer and carcinogens

Daratumumab Plus Atezolizumab in Previously Treated Advanced or Metastatic NSCLC: Brief Report on a Randomized, Open-Label, Phase 1b/2 Study (LUC2001 JNJ-54767414)

Rathi N. Pillai, MD, Suresh S. Ramalingam, MD, Meena Thayu, MD et al. · 2021 · JTO Clinical and Research Reports

Introduction: The programmed death-ligand 1 inhibitor atezolizumab improves progression-free survival (PFS) and overall survival (OS) for patients with previously treated advanced NSCLC. Preclinical studies indicate that targeting CD38-positive cells with daratumumab may synergistically enhance atezolizumab’s antitumor activity by increasing the effector T-cell activity. Methods: This phase 1b-2 study included a safety run-in (one cycle of daratumumab plus atezolizumab) and randomized phases (daratumumab plus atezolizumab versus atezolizumab alone). The primary objective of the randomized phas

View details →DOI: 10.1016/j.jtocrr.2020.100104
Negative / Null Result ReportOpen accessSurgery

Use of Botulinum Toxin for the Treatment of Raynaud Phenomenon

Manasa H. Kalluri, BS, Armin Edalatpour, MD, Allison J. Seitz, MD et al. · 2026 · Plastic and Reconstructive Surgery, Global Open

Summary:. Raynaud phenomenon (RP) is a vasospastic condition of the digital arteries that can cause pain, skin color changes, and functional limitations. Although botulinum toxin is not currently Food and Drug Administration–approved for the treatment of RP, it has been used in refractory RP and has generally been found to be well tolerated. At our institution, incobotulinumtoxinA (Xeomin) and abobotulinumtoxinA (Dysport) are commonly used. Here, we report our experience with the use of incobotulinumtoxinA (Xeomin) in the hand. We present 2 cases of patients with RP in bilateral hands who pres

View details →DOI: 10.1097/gox.0000000000007424
Negative / Null Result ReportOpen accessAgriculture (General)

Laboratory study of the nutrient release rate for vinasse on sandy soil and three coastal clay soils of Guyana

Clairmont Clementson, Lalita Gopaul · 2020 · International Journal of Recycling of Organic Waste in Agriculture

Purpose Vinasse is produced in large quantities as a by-product from bioethanol production. To ensure environmental sustainability, a beneficial use was sought. Previous study showed that short-term crops grown with vinasse-amended soil provided higher yield than crops treated with chemical NPK (15:15:15) fertilizer. To understand this phenomenon, this study sought to establish the nutrient release rates of vinasse in the agricultural soils of Guyana. Methods Soils representative of the three most common and one futuristic agricultural land in Guyana were fertilized with vinasse, then watered

View details →DOI: 10.30486/ijrowa.2020.1890596.1026
Negative / Null Result ReportOpen accessPsychiatry

A low-threshold sleep intervention for improving sleep quality and well-being

Esther-Sevil Eigl, Laura Krystin Urban-Ferreira, Manuel Schabus et al. · 2023 · Frontiers in Psychiatry

BackgroundApproximately one-third of the healthy population suffer from sleep problems, but only a small proportion of those affected receive professional help. Therefore, there is an urgent need for easily accessible, affordable, and efficacious sleep interventions.ObjectiveA randomized controlled study was conducted to investigate the efficacy of a low-threshold sleep intervention consisting of either (i) sleep data feedback plus sleep education or (ii) sleep data feedback alone in comparison with (iii) no intervention.Material and methodsA total of 100 employees of the University of Salzbur

View details →DOI: 10.3389/fpsyt.2023.1117645
Negative / Null Result ReportOpen accessEducation

Is Teacher Effectiveness Stable Across School Contexts? An Examination of Teachers Who Transfer Into Turnaround Schools

Lam D. Pham · 2022 · AERA Open

Turnaround interventions often require or encourage low-performing schools to replace teachers, assuming that schools will recruit high-performing teachers who remain effective after transferring. However, teacher effectiveness may change after transferring, which could explain why some teacher replacement efforts do not improve student achievement. This paper contributes new information on the stability of teacher effectiveness by examining teachers who transfer into turnaround schools relative to teachers who transfer into low-performing but non-turnaround schools. I examine this issue by us

View details →DOI: 10.1177/23328584221139763
Negative / Null Result ReportOpen accessElectrical engineering. Electronics. Nuclear engineering

Solar energy for liquid wastewater treatment with novel TiO2 supported catalysts

Rui C. Martins, Ângelo Sacras, Sanja Jovanovic et al. · 2022 · Energy Reports

Photocatalytic oxidation is promising technology for removal of recalcitrant pollutants from water. Solar energy can be an interesting radiation source since the operating costs can be lower. However, the use of powder photocatalyst is a major drawback of the technology since suitable separation technologies are required and catalysts recovery is difficult. This work aims to test the suitability of using polymeric supports to immobilize TiO 2 in the reactor and apply it for parabens removal from water by solar photocatalytic oxidation. Polyurethanes (PU) and polydimethylsiloxane (PDMS) membran

View details →DOI: 10.1016/j.egyr.2022.01.196
Negative / Null Result ReportOpen accessChemical technology

Performance-Based Robotic Training in Individuals with Subacute Stroke: Differences between Responders and Non-Responders

Ophélie Pila, Christophe Duret, Typhaine Koeppel et al. · 2023 · Sensors

The high variability of upper limb motor recovery with robotic training (RT) in subacute stroke underscores the need to explore differences in responses to RT. We explored differences in baseline characteristics and the RT dose between responders (ΔFugl-Meyer Assessment (FMA) score ≥ 9 points; n = 20) and non-responders ( n = 16) in people with subacute stroke (mean [SD] poststroke time at baseline, 54 (26) days, baseline FMA score, 23 (17) points) who underwent 16 RT sessions combined with conventional therapies. Baseline characteristics were compared between groups. During RT sessions, the a

View details →DOI: 10.3390/s23094304
Negative / Null Result ReportOpen accessDiseases of the digestive system. Gastroenterology

A randomized control trial to assess the effectiveness of a brief educational intervention on colonoscopy preparation and experience in patients with inflammatory bowel disease

Sumanpreet Kaur, Neha Jindal, Amandeep Kaur et al. · 2025 · BMC Gastroenterology

Abstract Background Colonoscopy is important for diagnosis, assessment and dysplasia screening in inflammatory bowel disease (IBD). A good bowel preparation is required for complete and adequate assessment. Trial design Randomised, assessor blinded parallel arm trial with 1:1 allocation. Methods Patients with IBD undergoing colonoscopy were randomised to control group (standard preparation with written instructions) or experimental group (additional brief video educational intervention). Outcome assessors and colonoscopist were masked to the allocation. Primary outcome was adequacy of bowel pr

View details →DOI: 10.1186/s12876-025-04242-x
Negative / Null Result ReportOpen accessVeterinary medicine

Modification of albendazole pharmacokinetics by menbutone administration in calves

E. Milena Vazquez, Beatriz Romero, Raquel Diez et al. · 2026 · Frontiers in Veterinary Science

Optimizing the use of the existing anthelmintics has become a priority, as resistance is a growing concern worldwide and the development of novel antiparasitic drugs slow. The paper describes the pharmacokinetic interaction between the antiparasitic albendazole (ABZ) and the choleretic drug menbutone (MEN) in calves, when ABZ was administered orally (7.5 mg/kg) alone or with intramuscular MEN (10 mg/kg) (1 or 2 doses 24 h apart) to 12 animals. Blood samples were collected at 14 sampling points over 72 h, and plasma concentrations of ABZ, albendazole sulfoxide (ABZSO, active metabolite), and al

View details →DOI: 10.3389/fvets.2026.1834486
Negative / Null Result ReportOpen accessVeterinary medicine

Clinical utility of fungal culture and antifungal susceptibility in cats and dogs with histoplasmosis

Andrew S. Hanzlicek, Kate S. KuKanich, Audrey K. Cook et al. · 2023 · Journal of Veterinary Internal Medicine

Abstract Background Culture can be used for diagnosis and antifungal susceptibility testing in animals with fungal infections. Limited information is available regarding the diagnostic performance of culture and the susceptibility patterns of Histoplasma spp. isolates. Hypothesis/Objectives Describe the clinical utility of culture and the susceptibility patterns of Histoplasma spp. isolates causing histoplasmosis in cats and dogs. Animals Seventy‐one client‐owned animals, including 33 cats and 19 dogs with proven or probable histoplasmosis. Methods Culture was attempted from tissue or fluid sa

View details →DOI: 10.1111/jvim.16725
Negative / Null Result ReportOpen accessNeurology. Diseases of the nervous system

The Effect of Spinal Tap Test on Different Sensory Modalities of Postural Stability in Idiopathic Normal Pressure Hydrocephalus

Katrin Abram, Silvia Bohne, Peter Bublak et al. · 2016 · Dementia and Geriatric Cognitive Disorders Extra

Background/Aims: Postural instability in patients with normal pressure hydrocephalus (NPH) is a most crucial symptom leading to falls with secondary complications. The aim of the current study was to evaluate the therapeutic effect of spinal tap on postural stability in these patients. Methods: Seventeen patients with clinical symptoms of NPH were examined using gait scale, computerized dynamic posturography (CDP), and neuropsychological assessment. Examinations were done before and after spinal tap test. Results: The gait score showed a significant improvement 24 h after spinal tap test in al

View details →DOI: 10.1159/000450602
Negative / Null Result ReportOpen accessMedicine

Availability of volunteer-led home-based care system and baseline factors as predictors of clinical outcomes in HIV-infected patients in rural Zambia.

Christopher B Estopinal, Janneke H van Dijk, Stanley Sitali et al. · 2012 · PLoS ONE

Background We assessed the impact of home-based care (HBC) for HIV+ patients, comparing outcomes between two groups of Zambians receiving antiretroviral therapy (ART) who lived in villages with and without HBC teams. Methods We conducted a retrospective cohort study using medical charts from Macha Mission Hospital, a hospital providing HIV care in Zambia's rural Southern Province. Date of birth, date of ART initiation, place of residence, sex, body mass index (BMI), CD4+ cell count, and hemoglobin (Hgb) were abstracted. Logistic regression was used to test our hypothesis that HBC was associate

View details →DOI: 10.1371/journal.pone.0049564
Negative / Null Result ReportOpen accessMedicine

Challenges and strategies in the soluble expression of CTA1-(S14P5)4-DD and CTA1-(S21P2)4-DD fusion proteins as candidates for COVID-19 intranasal vaccines.

Simson Tarigan, Gita Sekarmila, Apas et al. · 2024 · PLoS ONE

Developing intranasal vaccines against pandemics and devastating airborne infectious diseases is imperative. The superiority of intranasal vaccines over injectable systemic vaccines is evident, but developing effective intranasal vaccines presents significant challenges. Fusing a protein antigen with the catalytic domain of cholera toxin (CTA1) and the two-domain D of staphylococcal protein A (DD) has significant potential for intranasal vaccines. In this study, we constructed two fusion proteins containing CTA1, tandem repeat linear epitopes of the SARS-CoV-2 spike protein (S14P5 or S21P2), a

View details →DOI: 10.1371/journal.pone.0306153
Negative / Null Result ReportOpen accessGeriatrics

Absolute and relative reliability of acute effects of aerobic exercise on executive function in seniors

Lars Donath, Sebastian Ludyga, Daniel Hammes et al. · 2017 · BMC Geriatrics

Abstract Background Aging is accompanied by a decline of executive function. Aerobic exercise training induces moderate improvements of cognitive domains (i.e., attention, processing, executive function, memory) in seniors. Most conclusive data are obtained from studies with dementia or cognitive impairment. Confident detection of exercise training effects requires adequate between-day reliability and low day-to-day variability obtained from acute studies, respectively. These absolute and relative reliability measures have not yet been examined for a single aerobic training session in seniors.

View details →DOI: 10.1186/s12877-017-0634-x
Negative / Null Result ReportOpen accessMedicine

How safe and effective is oral analgesia for hip fracture patients? – a prospective cohort study

Zehra Abdul Muhammad, Tashfeen Ahmad · 2025 · Journal of the Pakistan Medical Association

Objective: To assess the safety and pain reduction profile of routinely prescribed oral analgesics in patients of hip fracture surgery. Method: The single-centre, prospective, cohort study was conducted from June 2022 to July 2023 at the Aga Khan University Hospital, Karachi and comprised adult patients of either gender with hip fractures. The analgesics prescribed at the time of hospital discharge and 1-week follow-up were recorded along with pain and adverse effects till the 2-week post-discharge follow-up. Pain was recorded using the visual analogue scale, with the target score set at 3/10.

View details →DOI: 10.47391/jpma.20532
Negative / Null Result ReportOpen accessDentistry

Addition of bone morphogenetic protein type 2 to ascorbate and -glycerophosphate supplementation did not enhance osteogenic differentiation of human adipose-derived stem cells

Ariadne Cristiane Cabral Cruz, Mariana Lúcia Silva, Thiago Caon et al. · 2012 · Journal of Applied Oral Science

Bone morphogenetic protein type 2 (BMP-2) is a potent local factor, which promotes bone formation and has been used as an osteogenic supplement for mesenchymal stem cells. OBJECTIVES: This study evaluated the effect of a recombinant BMP-2 as well as the endogenous BMP-4 and BMP-7 in the osteogenic differentiation of adipose-derived stem cells (ASCs) in medium supplemented with ascorbate and -glycerophosphate. MATERIAL AND METHODS: Human ASCs were treated with osteogenic medium in the presence (ASCs+OM+BMP-2) or absence (ASCs+OM) of BMP-2. The alkaline phosphatase (ALP) activity was determined

Negative / Null Result ReportOpen accessMedicine

Effects of executive function training on balance and auditory-cognitive dual-task performance in adults with and without hearing loss.

Niroshica Mohanathas, Lianna Montanari, Rachel Downey et al. · 2026 · PLoS ONE

Background Multitasking, such as listening while balancing, relies on integrated processing in the sensory, cognitive, and motor systems; systems that often decline with age. Hearing loss is linked to increased risks of both falls and cognitive decline. Improving cognitive processing through executive function (EF) training may support balance, especially in older adults with hearing loss. This randomized controlled study conducted across age groups and hearing abilities, examined the effects of a 12-week EF training program on postural outcomes (center of pressure (COP)) using an auditory-cog

View details →DOI: 10.1371/journal.pone.0331276
Negative / Null Result ReportOpen accessComputer applications to medicine. Medical informatics

Health-related quality of life and self-related health in patients with type 2 diabetes: Effects of group-based rehabilitation versus individual counselling

Vadstrup Eva S, Frølich Anne, Perrild Hans et al. · 2011 · Health and Quality of Life Outcomes

Abstract Background Type 2 diabetes can seriously affect patients' health-related quality of life and their self-rated health. Most often, evaluation of diabetes interventions assess effects on glycemic control with little consideration of quality of life. The aim of the current study was to study the effectiveness of group-based rehabilitation versus individual counselling on health-related quality of life (HRQOL) and self-rated health in type 2 diabetes patients. Methods We randomised 143 type 2 diabetes patients to either a six-month multidisciplinary group-based rehabilitation programme in

View details →DOI: 10.1186/1477-7525-9-110
Negative / Null Result ReportMedicine

Preoperative blood spinal cord barrier biomarker levels correlate with neurological outcome in patients with degenerative cervical myelopathy one year after surgery: a prospective cohort study.

Schmidt TP, Jütten K, Bertram U et al. · 2026 · World neurosurgery

Degenerative cervical myelopathy (DCM) is the leading cause of chronic spinal cord dysfunction and can lead to severe neurological impairment if untreated. While decompressive surgery is the standard treatment, predicting postoperative…

View details →DOI: 10.1016/j.wneu.2026.125140