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21,742 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

Red cell distribution width in relation to incidence of stroke and carotid atherosclerosis: a population-based cohort study.

Martin Söderholm, Yan Borné, Bo Hedblad et al. · 2015 · PLoS ONE

Increased red cell distribution width (RDW) has been related to poor prognosis in patients with cardiovascular disease, and is a predictor of cardiovascular mortality in the general population. The purpose of the present study was to investigate if RDW is associated with increased incidence of stroke and its subtypes in individuals from the general population.Red cell distribution width was measured in 26,879 participants (16,561 women and 10,318 men aged 45-73 years) without history of coronary events or stroke, from the population-based Malmö Diet and Cancer Study. Incidences of total stroke

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Negative / Null Result ReportMedicine

Gut Microbiome and Environmental Enteric Dysfunction Are Unchanged by 18 Months of Small-Quantity Lipid-Based Nutrient Supplementation among Young Children in Lusaka, Zambia.

Lauer, Leng, Chembe et al. · 2026 · The British journal of nutrition

Small-quantity lipid-based nutrient supplements (SQ-LNS) have been shown to improve growth, development, and survival among young children in low-resource settings. One hypothesized pathway is through improvements in intestinal health,…

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Negative / Null Result ReportOpen accessDermatology

Can Foot Dermatophyte Infections Signal Future Diabetes Risk? Findings from a Register-based Study

Anne Sofie Frølunde, Jan Brink Valentin, Lise Kristensen et al. · 2026 · Acta Dermato-Venereologica

Dermatophyte infections are common in general practice and occur more often in individuals with type 2 diabetes (T2D), but whether they signal undiagnosed T2D remains unclear. We conducted a register-based cohort study including positive PCR tests for dermatophyte infection from the feet or nails, matched 1:3 to individuals from the same geographic area in Denmark. Those with known diabetes, type 1 diabetes or aged under 20 were excluded. Incidence rates (IRs) and incidence rate ratios (IRRs) for new-onset T2D were estimated using Poisson regression. The final cohort comprised 78,140 individua

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Negative / Null Result ReportOpen accessMicrobiology

Salivary microbiome in patients with benign prostatic hyperplasia: altered composition and its association with prostate-specific antigen

Bin Zhang, Hao Guo, Zhou Li et al. · 2025 · BMC Microbiology

Abstract Backgrounds Microbial dysbiosis in the gut and urine has been implicated in patients with benign prostatic hyperplasia (BPH) in previous studies. Additionally, emerging evidence suggests that salivary dysbiosis is associated with various diseases and oral health conditions. Building on these findings, this study aimed to investigate whether BPH patients exhibit a distinct salivary microbiome. Methods and materials We recruited a cohort of BPH patients (n = 50) and age- and BMI-matched healthy controls (HC; n = 50). Salivary samples were collected for 16S rRNA gene sequencing, and pros

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Negative / Null Result ReportOpen accessMedicine (General)

Impact of PAI-1 4G/5G and C > G polymorphisms in acute ST elevation myocardial infarction and stable angina patients: A single center Egyptian study

Hanan Al-Wakeel, Nadia Sewelam, Mohamed Khaled et al. · 2018 · Egyptian Journal of Medical Human Genetics

Background: Many genetic factors, including polymorphisms in the genes regulating blood coagulation and fibrinolysis have been proposed as risk factors for coronary artery disease (CAD). PAI-1 is the chief inhibitor of tissue plasminogen activator and urokinase plasminogen activator. PAI-1 has a crucial role in regulation of fibrinolysis. Aim of the study: Is to investigate the association between Plasminogen activator inhibitor-1 (PAI-1) 4G/5G, PAI-1C/G polymorphisms and CAD. In addition, studying the relation of these polymorphisms to the level of active PAI-1 in Egyptian patients presenting

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Negative / Null Result ReportOpen accessDiseases of the endocrine glands. Clinical endocrinology

Association between Helicobacter pylori Infection and Diabetes: A Cross-Sectional Study in China

Sailimai Man, Yuan Ma, Cheng Jin et al. · 2020 · Journal of Diabetes Research

Background. Studies suggest an association between H. pylori infection and extragastrointestinal disease. Limited studies provided conflicting results on the association between H. pylori infection and diabetes. The present study was aimed at examining the association between H. pylori infection and diabetes in a large health checkup population in China. Methods. A cross-sectional study was conducted; participants who attended health checkups at Beijing MJ Health Screening Center during 2017-2018 were included. H. pylori infection was diagnosed by 13C-urea breath test. Multivariate logistic re

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Negative / Null Result ReportOpen accessMedicine

Anxiety and Depressive Symptoms as Predictors of All-Cause Mortality among People with Insulin-Naïve Type 2 Diabetes: 17-Year Follow-Up of the Second Nord-Trøndelag Health Survey (HUNT2), Norway.

Marjolein M Iversen, Giesje Nefs, Grethe S Tell et al. · 2016 · PLoS ONE

Aim To examine whether elevated anxiety and/or depressive symptoms are related to all-cause mortality in people with Type 2 diabetes, not using insulin. Methods 948 participants in the community-wide Nord-Trøndelag Health Survey conducted during 1995-97 completed the Hospital Anxiety and Depression Scale with subscales of anxiety (HADS-A) and depression (HADS-D). Elevated symptoms were defined as HADS-A or HADS-D ≥8. Participants with type 2 diabetes, not using insulin, were followed until November 21, 2012 or death. Cox regression analyses were used to estimate associations between baseline e

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Negative / Null Result ReportOpen accessPathology

Interaction of chronic daily headache, dietary intake of iron, and FTO genotype

Yeganeh Shekari, Zahra Mahmoodi, Mohammadtaghi Ghorbani Hesari et al. · 2026 · Molecular Pain

Background: Chronic daily headache (CDH) is known to be a common and debilitating disease that is influenced by genetic, dietary, and lifestyle factors. Iron (Fe) plays a key role in energy metabolism and neurotransmitter synthesis, while the FTO gene polymorphism (rs9939609) may play a role in modulating nutritional responses and nutrient metabolism. This study aimed to determine the interaction between CDH odds, dietary iron intake, and FTO genotype. Methods: This case-control study was conducted on 150 CDH patients and 150 healthy individuals aged 40–80 years. Participants were assessed for

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Negative / Null Result ReportOpen accessPublic aspects of medicine

Prenatal exposure to bisphenol A and phthalates and behavioral problems in children at preschool age: the Hokkaido Study on Environment and Children’s Health

Machiko Minatoya, Sachiko Itoh, Keiko Yamazaki et al. · 2018 · Environmental Health and Preventive Medicine

Abstract Background Studies reported adverse behavioral development including internalizing and externalizing problems in association with prenatal exposure to bisphenol A (BPA) and phthalates; however, findings were not sufficient due to using different assessment tools and child ages among studies. This study aimed to examine associations between maternal serum levels of BPA and phthalate metabolites and behavioral problems at preschool age. Methods The Strengths and Difficulties Questionnaire (SDQ) was used to assess behavioral problems at 5 years of age. BPA and phthalate metabolite levels

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Negative / Null Result ReportOpen accessMedicine

Two Serial Hematocrit Level Just After Admission to Predict Dengue Hemorrhagic Fever Severity

Fauziyyah Ramadhani, Mohammad Ghozali, Leni Lismayanti · 2018 · Global Medical & Health Communication

Dengue hemorrhagic fever (DHF) is still the leading cause of hospitalization and death among children in Indonesia because of plasma leakage leading to shock syndromes. This study aimed to associate the hematocrit difference (first and second) from serial hematocrit (Hct) examination just after admission with DHF severity. A analytical cross-sectional study was involving medical records of pediatric patients with DHF admitted at the pediatric ward and the Pediatric Intensive Care Unit (PICU) of Dr. Hasan Sadikin General Hospital, Bandung in January–December 2015. The subjects excluded if other

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Negative / Null Result ReportOpen accessMedicine (General)

Effects of Changes in Metabolic Syndrome Status on Cognitive Function: A 10‐Year Study in a Middle‐Aged Population

Kelly Lim, Meng‐Ni Wu, Wei‐Chia Tsao et al. · 2026 · Kaohsiung Journal of Medical Sciences

ABSTRACT The long‐term cumulative impact of metabolic syndrome (MS) on cognitive decline remains uncertain. This study investigated how changes in MS status over 10 years relate to cognition and whether sex modifies this relationship. A total of 766 participants (mean baseline age: 54 years) from the Kaohsiung Atherosclerosis Longitudinal Study were enrolled. MS was defined using the modified National Cholesterol Education Program Adult Treatment Panel III criteria for Asian populations. Participants were categorized into four groups based on changes in MS status over the 10‐year follow‐up: ne

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

Association of peripheral neutrophil count with intracranial atherosclerotic stenosis

Xing Zhang, Xiao-He Hou, Ya-Hui Ma et al. · 2020 · BMC Neurology

Abstract Background Inflammation plays an important role in atherosclerosis but the contribution of neutrophils to this process is unclear. We sought to assess whether neutrophil count is associated with intracranial atherosclerotic stenosis (ICAS). Methods A total of 2847 individuals were included in our study, including 1363 with acute ischemic stroke and 1484 normal controls without stroke. The presence of ICAS was confirmed by magnetic resonance angiography. The association between neutrophil count and ICAS was evaluated by multivariable logistic regression analysis. Results Among 2847 ind

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Negative / Null Result ReportOpen accessScience (General)

Expression of interferon-stimulated genes, but not polymorphisms in the interferon α/β receptor 2 gene, is associated with coronavirus disease 2019 mortality

Berliana Hamidah, Cennikon Pakpahan, Laksmi Wulandari et al. · 2024 · Heliyon

Excessive inflammatory response is a hallmark of severe COVID-19. This study investigated the associations between interferon-stimulated genes (ISGs) expression, genetic variation in the interferon α/β receptor 2 (IFNAR2) gene, and COVID-19 mortality.We investigated 67 patients with moderate-to-severe COVID-19. Of them, 22 patients (32.8 %) died because of COVID-19. We examined the expression of ISGs in total RNA of peripheral whole blood. We observed a significant increase in the expression of all ISGs examined in non-surviving patients, indicating a heightened interferon type I signaling act

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Negative / Null Result ReportOpen accessMedicine

Do economic shocks spread randomly?: A topological study of the global contagion network.

Tamás Sebestyén, Zita Iloskics · 2020 · PLoS ONE

The spread of economic shocks in an increasingly interconnected global economy has been subject to several studies recently. These studies mostly focus on the synchronization of business cycles among economies and search for the relationship between trade linkages and shock contagion. In contrast to previous studies in the field, this paper focuses on the topological properties of the shock contagion network as measured by pairwise Granger causality between economic output of countries. This topological approach can bring new insights into the dynamics of contagion and the relationship between

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Negative / Null Result ReportOpen accessPediatrics

Serum zinc level in critically ill children with lower respiratory tract infection

Radwa Iraqy, Mahmoud Hamdy, Laila Hussein et al. · 2026 · Egyptian Pediatric Association Gazette

Abstract Introduction Zinc plays a crucial role in both innate and adaptive immune responses by regulating intracellular signaling pathways in immune cells. Zinc deficiency has been implicated in up to 4.4% of infection-related deaths in developing countries. Acute lower respiratory infections (ALRIs), particularly pneumonia, are a leading cause of morbidity and mortality among young children which accounts for around 81% of deaths in the first two years of life. Method One hundred twenty children were enrolled in this study, divided in 2 groups: 60 critically ill children diagnosed with pneum

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Negative / Null Result ReportOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry

Lack of Association Between DJ-1 Gene Promoter Polymorphism and the Risk of Parkinson’s Disease

Lu He, Suzhen Lin, Hong Pan et al. · 2019 · Frontiers in Aging Neuroscience

Low DJ-1 protein level caused by DJ-1 gene mutation leads to autosomal recessive Parkinson’s disease (PD) due to impaired antioxidative activity. In sporadic PD patients, although mutations were rarely found, lower DJ-1 protein level was also reported. Dysregulation of DJ-1 gene expression might contribute to low DJ-1 protein level. Since the promoter is the most important element to initiate gene expression, whether polymorphisms in the DJ-1 promoter result in the dysregulation of gene expression, thus leading to low protein level and causing PD, is worth exploring. The DJ-1 promoter region w

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Negative / Null Result ReportOpen accessDiseases of the musculoskeletal system

Clinical characteristics and frequency of TLR4 polymorphisms in Brazilian patients with ankylosing spondylitis

Natalia Pereira Machado, Eliana Nogueira, Karen Oseki et al. · Revista Brasileira de Reumatologia

ABSTRACT Objectives: Innate immunity is involved in the physiopathology of ankylosing spondylitis (AS), with the participation of Gram-negative bacteria, modulation of human leukocyte antigen (HLA) B27 and the involvement of pattern recognition receptors, such as Toll-like receptors (TLRs). The aim of this study was to investigate the clinical characteristics and frequency of TLR4 polymorphisms (Asp299Gly and Thr 399Ile) in a cohort of Brazilian patients with AS. Methods: A cross-sectional study was carried out involving 200 patients with a diagnosis of AS and a healthy control group of 200 in

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Negative / Null Result ReportOpen accessNursing

The effect of an educational intervention for university students on violence against the elderly using gamification: a non-randomized clinical trial

Juliana Ribeiro da Silva Vernasque, Miriam Fernanda Sanches Alarcon, Daiana Bonfim et al. · 2025 · Revista Latino-Americana de Enfermagem

Objective: to evaluate the impact of a gamified educational intervention on violence against the elderly on the knowledge, perceptions and attitudes of university students. Method: a non-randomized clinical trial involving 44 university students from the health sciences, humanities and exact sciences, with 22 in the intervention group and 22 in the control group. The intervention group participated in hybrid activities on gamification applied to the topic of violence against the elderly. The evaluation was conducted using thematic cases validated by experts, with statistical analysis using Chi

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Negative / Null Result ReportOpen accessNutritional diseases. Deficiency diseases

Cadmium and selenium blood levels in association with congestive heart failure in diabetic and prediabetic patients: a cross-sectional study from the national health and nutrition examination survey

Renyue Ji, Haisheng Wu, Hongli Lin et al. · 2025 · Diabetology & Metabolic Syndrome

Abstract Background Epidemiological research on the association between heavy metals and congestive heart failure (CHF) in individuals with abnormal glucose metabolism is scarce. The study addresses this research gap by examining the link between exposure to heavy metals and the odds of CHF in a population with dysregulated glucose metabolism. Method This cross-sectional study includes 7326 patients with diabetes and prediabetes from the National Health and Nutrition Examination Survey from 2011 to 2018. The exposure variables are five environmental heavy metals—cadmium (Cd), lead (Pb), mercur

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Negative / Null Result ReportOpen accessMedicine

Renal biomarkers in pre-eclampsia and their associations with severity of pre-eclampsia

Paschalina C Ezechukwu, Emmanuel O Ugwu, Samuel N Obi et al. · 2023 · International Journal of Medicine and Health Development

Background: Preeclampsia is one of the leading causes of maternal and perinatal morbidity and mortality in Nigeria and worldwide. It is not yet concluded as to whether or not elevated levels of serum creatinine and/or uric acid could be regarded as a predictive indicator for the severity of the disease. Objectives: To compare the mean serum levels of uric acid and creatinine in preeclamptic and normotensive pregnant women and assess for any associations between these renal biomarkers and the severity of preeclampsia in Nigeria. Materials and Methods: It was a cross-sectional analytical study o

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Negative / Null Result ReportOpen accessMedicine

Non-invasive prenatal testing in mitigating concerns from invasive prenatal diagnostic testing: retrospective assessment of utility in an academic healthcare system in the US

Kibum Kim, Linda Kaitlyn Craft · 2022 · BMJ Open

Objective Non-invasive prenatal testing (NIPT) is a front-line screening for fatal chromosomal aneuploidy. In pregnant women with a risk of having fetal congenital disorders, NIPT is anticipated to reduce the needs of invasive prenatal diagnostic test (IPD). The objective of this study was to understand the acceptance of NIPT and the utility of NIPT to mitigate concerns about IPD in the US high-risk pregnancy management.Design and setting This was a retrospective observational research using healthcare records obtained from an academic healthcare system in the US. The study consisted of site-l

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Negative / Null Result ReportOpen accessPediatrics

The effect of haemoglobin and blood transfusion on preterm infant gut perfusion and injury

Claire Howarth, Christian Mifsud, Christian Mifsud et al. · 2024 · Frontiers in Pediatrics

IntroductionThere is significant uncertainty regarding the role that anaemia or red blood cell transfusion (RBCT) plays in the development of gut injury in preterm infants. This study evaluated Near Infrared Spectroscopy (NIRS) together with a range of known biomarkers of gut inflammation to identify their relationship with anaemia and RBCT.MethodA prospective observational study of preterm infants born at <30 weeks gestation was conducted from birth until either 36 weeks post conceptional age or discharge home. Gut perfusion and biomarkers of gut injury were assessed weekly by: 60 min NIRS me

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Negative / Null Result ReportOpen accessTheory and practice of education

Assessing Physics Proficiency and Influencing Factors among Civil Engineering Students of Benguet State University as a Driver for STEM Innovation

Chatelaine M. Wansi · 2026 · International Journal of Multidisciplinary Educational Research and Innovation

Physics and engineering are like two peas in a pod; one cannot be complete without the other. Physics is an integral part of the engineering curricula as the latter is founded on principles of our physical world. Thus, understanding the level of physics conceptual comprehension and mathematical proficiency of civil engineering students as well as identifying factors that affect it helps educators, academic institutions, and policy-makers better serve and prepare students as reliable future civil engineers. This research utilized a quantitative research design, specifically a predictive correla

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Negative / Null Result ReportOpen accessMedicine

Knowledge, attitudes, and practices of community pharmacists regarding obesity management: A cross-sectional study

Haure Osman Muhammad Hamadamin, Samir Mahmood Othman · 2026 · Zanco Journal of Medical Sciences

Background and objective: Obesity is a chronic, multifactorial condition characterized by an excessive accumulation of body fat that presents significant health risks. Community pharmacists, for instance, are highly accessible and often serve as the first point of contact for patients seeking advice on weight management. This study aims to fill a research gap by evaluating community pharmacists’ knowledge, attitudes, and practices related to obesity and weight management. Methods: A cross-sectional study was carried out among 331 community pharmacists among different pharmacy settings in Erbil

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Negative / Null Result ReportOpen accessPublic aspects of medicine

Parental education, screen time and oral health: a cross-sectional study among adolescents

Hatice Özyılmaz, Serdar Bağlar · 2026 · BMC Public Health

Abstract Background Adolescence is a critical milestone in the transition to adulthood. Factors affecting oral health, an essential component of general health during this period, also influence public health. This study investigates the potential impact of parental education level (PEL) and daily total daily screen time (DTST) on adolescent oral health using a large sample size. Methods A total of 1300 adolescents aged 17 and 18 from Ordu Province were included in this study. A structured questionnaire was used to assess PEL, DTST, and other habits that may influence dental caries. Oral healt

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Negative / Null Result ReportOpen accessMedicine

Macrophage numbers in the marginal area of sarcomas predict clinical prognosis

Michinobu Umakoshi, Akiko Nakamura, Hiroyuki Tsuchie et al. · 2023 · Scientific Reports

Abstract Even when treated comprehensively by surgery, chemotherapy, and radiotherapy, soft-tissue sarcoma has an unfavorable outcome. Because soft-tissue sarcoma is rare, it is the subject of fewer clinicopathological studies, which are important for clarifying pathophysiology. Here, we examined tumor-associated macrophages in the intratumoral and marginal areas of sarcomas to increase our knowledge about the pathophysiology. Seventy-five sarcoma specimens (not limited to a single histological type), resected at our institution, were collected, and the number of CD68-, CD163-, and CD204-posit

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Negative / Null Result ReportOpen accessMedicine

Study of sociodemographic factors and perceptions of women in the reproductive age group with anaemia – A hospital-based cross-sectional study in South India

N Bushra Thasneem, Resmi S. Kaimal, Abdul Hakeem Thengu Murichathil · 2025 · Journal of Family Medicine and Primary Care

Introduction: Anaemia is one of the significant public health problems faced by developing countries. It occurs more frequently in women of childbearing age. Anaemia causes poor work capacity, and severe forms may even cause cardiac failure. In pregnant women, anaemia may lead to preterm labour, low-birth-weight babies, and increased risk of maternal mortality due to post-partum haemorrhage. Even though there are national programmes to supply iron free of cost and other measures to tackle anaemia, it is still prevalent in our country. Anaemia prevalence has increased between NFHS-4 and NFHS-5,

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Negative / Null Result ReportOpen accessNeurosciences. Biological psychiatry. Neuropsychiatry

Sleep-dependent memory consolidation in breast cancer: Use of a virtual reality prospective memory task

Mylène Duivon, Joy Perrier, Carine Segura-Djezzar et al. · 2022 · Frontiers in Neuroscience

BackgroundPrevious studies have revealed both sleep alterations and prospective memory (PM) impairments in breast cancer (BC) patients. PM refers to memory of intended actions and is crucial for daily living tasks and treatment compliance. As sleep is known to favor memory consolidation, one may expect that changes in sleep quality related to BC would have an impact on PM performance. This study aimed at assessing sleep-dependent consolidation of intentions using an ecological, virtual reality-based PM task in BC patients not treated with chemotherapy.Materials and methodsThirty-seven early st

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