Negative / Null Result ReportOpen accessDiseases of the circulatory (Cardiovascular) system
Barrak Alahmad, Taofik Oyekunle, Claire Strohmeyer et al. · 2025 · Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Arrhythmia, particularly atrial fibrillation, is on the rise globally. While increased surveillance, aging populations, and other risk factors partially explain this rise, emerging risks such as extreme heat from climate change are underexplored. Methods We used Product Surveillance Registry by Medtronic (2016–2023) in the United States to examine patients with implantable cardioverter‐defibrillator or cardiac resynchronization therapy defibrillator devices. We identified first arrhythmic episodes (atrial tachycardia/fibrillation [AT/AF] or ventricular tachycardia/fibrillation) reco
View details →Negative / Null Result ReportOpen accessNeurology. Diseases of the nervous system
Kollipara Sumanth, Uma Sinharoy, Anindita Joardar et al. · 2026 · Annals of Indian Academy of Neurology
Background and Objectives: Epilepsy, with its complex interplay of neurobiological, genetic, and pharmacological factors, continues to challenge neurologists worldwide—particularly in managing drug resistance. This study aimed to evaluate the frequency of the SCN1A and SCN2A gene polymorphisms among patients with epilepsy (PWE) from Eastern India to assess their relationship with clinical profiles, electroencephalography (EEG) findings, and response to antiseizure medication. Methods: In this case–control genetic association study, a total of 110 PWE were assessed for demographic and clinical
View details →Short NoteMedicine
Fahrenhorst-Jones T, Pereira R, Craigie M · 2026 · BMJ case reports
A woman aged in her 50s presented with sudden onset of vertigo, headaches and epistaxis, initially attributed to her background of chronic systemic hypertension. Ophthalmological history was significant for bilateral proliferative diabetic…
View details →Negative / Null Result ReportOpen accessNeoplasms. Tumors. Oncology. Including cancer and carcinogens
Muller Susan, Bouquot Jerry, Lou Yahuan et al. · 2007 · BMC Cancer
Abstract Background TRAIL plays an important role in host immunosurveillance against tumor progression, as it induces apoptosis of tumor cells but not normal cells, and thus has great therapeutic potential for cancer treatment. TRAIL binds to two cell-death-inducing (DR4 and DR5) and two decoy (DcR1, and DcR2) receptors. Here, we compare the expression levels of TRAIL and its receptors in normal oral mucosa (NOM), oral premalignancies (OPM), and primary and metastatic oral squamous cell carcinomas (OSCC) in order to characterize the changes in their expression patterns during OSCC initiation a
View details →Negative / Null Result ReportOpen accessDermatology
Raissa Massaia Londero Chemello, Elsa Regina Justo Giugliani, Renan Rangel Bonamigo et al. · 2011 · Anais Brasileiros de Dermatologia
FUNDAMENTOS: Não há consenso quanto ao efeito do aleitamento materno no desenvolvimento da dermatite atópica. É necessário aprofundar conhecimentos sobre possíveis fatores envolvidos nessa relação, como a influência do aleitamento materno na colonização do paciente atópico pelo Staphylococcus aureus (S. aureus). OBJETIVO: Avaliar uma potencial associação entre aleitamento materno e colonização pelo S. aureus nas crianças atópicas. MÉTODOS: Estudo transversal envolvendo 79 crianças atópicas de 4-24 meses, de ambos os sexos, em acompanhamento no Ambulatório de Dermatologia Sanitária de Porto Ale
View details →Negative / Null Result ReportOpen accessOtorhinolaryngology
Fery Mai Rafanan, Eduard Alfanta, Romulus Roberto Peter Instrella · 2024 · Philippine Journal of Otolaryngology Head and Neck Surgery
Objective: To investigate the association between the time intervals of key clinical time points and tumor progression (increase in clinical staging) in head and neck cancer patients before and during the pandemic. Methods: Design: Retrospective Cohort Study Setting: Tertiary Government Training Hospital Participants: A total of 81 head and neck cancer patients who consulted at the OPD and underwent elective surgery between January 1, 2018, and December 31, 2022, under the Department of Otorhinolaryngology – Head and Neck Surgery of East Avenue Medical Center were included in the study; 40 pat
View details →Negative / Null Result ReportOpen accessPsychology
Fahri Sezer, Aytekin Gürtepe · 2025 · BMC Psychology
Abstract The primary aim of this study was to investigate the relationships between attachment, social exclusion, and risky behaviors in adolescents. The sample comprised 463 adolescents, aged 13–18, attending various high schools in Turkey. Data were collected using three instruments: the Parent and Peer Attachment Inventory, the Ostracism (Social Exclusion) Scale for Adolescents, and the Risk Behaviors Scale. The results revealed a moderate negative correlation between attachment to mothers and risky behaviors, while a weaker negative correlation was observed between attachment to fathers an
View details →Negative / Null Result ReportOpen accessAgriculture
Nouraldin Moradi, Narges Nazifi, Qodrat Rahimi Miyanaji et al. · 2014 · مجله بیوتکنولوژی کشاورزی
Follicle stimulating hormone receptor (FSHR) and growth differentiation factor 9 (GDF9) both are the most important proteins that affect reproduction process in mammalian. Polymorphism in these genes and their possible relationship with twining trait in Zel (n=150) sheep are investigated in the present study. Blood samples were collected randomly via vein puncture. PCR-RFLP technique for FSHR marker site showed two A and B alleles with the frequency of 93.33 and 6.67 and two genotypes of AA and BB with the frequency of 93.33 and 6.67, respectively. However, the heterozygote AB genotype was not
View details →Negative / Null Result ReportOpen accessChemical technology
Kyung Won Lee, Min-Sook Kang, Seung Jae Lee et al. · 2023 · Foods
This study aimed to identify major dietary patterns associated with abdominal obesity in middle-aged and older Korean adults. Data from the Korean Genome and Epidemiology Study were used. A total of 48,037 Korean adults aged ≥40 years without abdominal obesity at baseline were followed-up. Dietary assessment was conducted using a validated 106-item food-frequency questionnaire, and dietary patterns were identified using factor analysis. Abdominal obesity was defined as a waist circumference of ≥90 cm for men and ≥85 cm for women, according to the Korean Society for the Study of Obesity. Multiv
View details →Negative / Null Result ReportOpen accessMedicine
Alexandria Turner, Mieke L van Driel, Ben Mitchell et al. · 2025 · Family Practice
Abstract Background Inappropriate antibiotic prescription for self-limiting respiratory tract infections (RTIs) by general practitioner (GP) registrars (trainees) is less common than by established GPs but still exceeds evidence-based…
View details →Negative / Null Result ReportOpen accessDiseases of the respiratory system
Suzanne L. Pollard, John J. Lima, Karina Romero et al. · 2017 · Asthma Research and Practice
Abstract Background Prior evidence suggests that vitamin D deficiency may increase the risk of asthma and atopy and impair pulmonary function in children. Methods In this cross-sectional analysis nested in a case-control study, we analyzed serum 25(OH)D concentrations in 413 children with asthma and 471 children without asthma living in two geographically adjacent study communities (Pampas and Villa El Salvador). We measured total and antigen-specific IgE levels, pulmonary function, asthma control, and exhaled nitric oxide. Results Mean 25(OH)D concentrations were 25.2 ng/mL (SD 10.1) in child
View details →Negative / Null Result ReportOpen accessGynecology and obstetrics
Ruiqi Wang, Yaqi Lin, Lixue Chen et al. · 2025 · Journal of Ovarian Research
Abstract Objective This multicenter retrospective study examines the impact of female COVID-19 infection on assisted reproductive technology (ART) outcomes, including clinical pregnancy rates, miscarriage rates, and live birth rates, and further evaluated potential influencing factors associated with these outcomes. Methods Our multicenter retrospective cohort study analyzed 10,140 cycles (2021–2023) from 10 Beijing ART centers, comparing 4,099 cycles from COVID-19-positive women with 6,041 age-matched (1:1.5) COVID-negative controls (pre-pandemic). Outcomes included pregnancy, miscarriage, an
View details →Negative / Null Result ReportOpen accessMedicine
Lauren S. Keenan-Devlin, Ann E. B. Borders, Alexa Freedman et al. · 2023 · Scientific Reports
Abstract Exposure to traumatic events during pregnancy may influence pregnancy and birth outcomes. Growing evidence suggests that exposure to traumatic events well before pregnancy, such as childhood maltreatment (CM), also may influence the course of pregnancy and risk of adverse birth outcomes. We aimed to estimate associations between maternal CM exposure and small-for-gestational-age birth (SGA) and preterm birth (PTB) in a diverse US sample, and to examine whether common CM-associated health and behavioral sequelae either moderate or mediate these associations. The Measurement of Maternal
View details →Negative / Null Result ReportOpen accessMedicine
Amir Mari, Wasef Na’amnih, Loay Ghantous et al. · 2023 · Scientific Reports
Abstract Gastro-esophageal reflux disease (GERD) can cause erosive esophagitis (EE) and compromise the quality of life (QoL). We examined differences in symptom severity and QoL according to EE severity grade. A follow-up study was conducted among GERD patients at the Nazareth Hospital in Israel. Patients underwent a baseline gastroscopy in 2014–2020 during which the EE grade was determined using the Los Angeles classification. Follow-up telephone interviews were conducted during 2019–2020 with a mean time interval of 18.9 months (SD = 14.9) after the baseline gastroscopy to assess GERD sympto
View details →Replication FailureOpen accessNutrition. Foods and food supply
Ziqi Sang, Ziqi Sang, Han Wang et al. · 2025 · Frontiers in Nutrition
BackgroundHepatic fibrosis and the fatty liver index (FLI) are critical indicators for assessing the progression and severity of metabolic dysfunction-associated steatotic liver disease (MASLD) and serve as valuable reference markers for predicting MASLD-related risks. The Dietary Inflammation Index (DII) quantifies the inflammatory effects of dietary intake and has been extensively utilized in nutritional and epidemiological studies. Although studies have been conducted to confirm the correlation between dietary quality and MASLD in the general population, this study sought to further explore
View details →Replication FailureOpen accessInfectious and parasitic diseases
Edlin Brian R, Yeager Meredith, Xiao Nianqing et al. · 2008 · BMC Infectious Diseases
Abstract Background Genetic variations in MBL2 that reduce circulating levels and alter functional properties of the mannose binding lectin (MBL) have been associated with many autoimmune and infectious diseases. We examined whether MBL2 variants influence the outcome of hepatitis C virus (HCV) infection. Methods Participants were enrolled in the Urban Health Study of San Francisco Bay area injection drug users (IDU) during 1998 through 2000. Study subjects who had a positive test for HCV antibody were eligible for the current study. Participants who were positive for HCV RNA were frequency ma
View details →Abandoned HypothesisOpen accessMedicine
A. Saiiari, M. Kashef, M. Adel et al. · 2017
Background: In the majority of cardiovascular diseases, cardiovascular structure changes in line with the type of disease. One of the goals of cardiac rehabilitation is the improvement of cardiac performance and reversibility of…
View details →Negative / Null Result ReportOpen accessShipment of goods. Delivery of goods
Theuns F.J. Oosthuizen · 2014 · Journal of Transport and Supply Chain Management
A lack of optimum selection and application of decision-making techniques, in conjunction with suitable decision-making practice and perception of employees in a transport work environment demands attention to improve overall performance. Although multiple decision-making techniques exist, five prevalent techniques were considered in this article, namely the Kepner-Tregoe, Delphi, stepladder, nominal group and brainstorming techniques. A descriptive research design was followed, using an empirical survey which was conducted among 210 workers employed in a transport work environment and studyin
View details →Negative / Null Result ReportOpen accessMedicine
Otobo I Ujah, Omojo C Adaji, Innocent A O Ujah et al. · 2025 · PLoS ONE
Food insecurity (FI) has been identified as a determinant of child development, yet evidence quantifying this association using the newly developed Early Childhood Development Index 2030 (ECDI2030) remains limited. Herein, we provide national estimates of early childhood development (ECD) risks using the ECDI2030 and examined to what extent FI was associated with ECD among children aged 24-59 months in Nigeria. This population based cross-sectional analyses used data from the UNICEF-supported 2021 Multiple Indicator Cluster Survey in Nigeria. The analytic sample comprised children aged 24-59 m
View details →Failed Experiment ReportOpen accessMedicine
Justyna Zielińska-Turek, Grzegorz Turek, Dominika Jakubowicz-Lachowska et al. · 2016 · Aktualności Neurologiczne
Objectives: No widely available, adequately sensitive diagnostic test to establish prognosis in stroke patients has been developed thus far. The aim of this study was to analyse changes in plasma levels of MMP-9 and MMP-2 as potential prognostic factors in patients with ischaemic stroke. Methods: The study included 56 patients presenting with the signs of ischaemic stroke for less than 24 hours, and 60 healthy controls without a history of neurological and/or inflammatory disorders. Plasma concentrations of MMP-2 and MMP-9 were determined immunoenzymatically at admission (i.e. within 24 hours
View details →Negative / Null Result ReportOpen accessNutritional diseases. Deficiency diseases
Rohith N. Thota, Shamasunder H. Acharya, Manohar L. Garg · 2019 · Lipids in Health and Disease
Abstract Background Lowering insulin resistance and dyslipidaemia may not only enhance glycaemic control but also preserve the β-cell function, reducing the overall risk of developing type 2 diabetes (T2D). The current study was aimed to evaluate the effects of curcumin and/or long-chain omega-3 polyunsaturated fatty acids (LCn-3PUFA) supplementation on glycaemic control and blood lipid levels in individuals at high risk of developing T2D. Methods This was a 2 × 2 factorial, randomised, double-blinded, placebo-controlled study. Participants were allocated to either double placebo (PL) or curcu
View details →Negative / Null Result ReportOpen accessBiology (General)
Aviad Schnapp, Moria Harel, Dalit Cayam-Rand et al. · 2022 · Biomedicines
Autism spectrum disorder (ASD) is often associated with debilitating sleep disturbances. While anecdotal evidence suggests the positive effect of cannabinoids, randomized studies are lacking. Here, we report the effects of cannabinoid treatment on the sleep of 150 children and adolescents with ASD, as part of a double-blind, placebo-controlled study that assessed the impact of cannabinoid treatment on behavior (NCT02956226). Participants were randomly assigned to one of the following three treatments: (1) whole-plant cannabis extract, containing cannabidiol (CBD) and Δ9-Tetrahydrocannabinol (T
View details →Negative / Null Result Report
Patrícia Fernandes Albeirice da Rocha, Luciano Marques dos Santos, Amanda J. Ullman et al. · 2025 · Revista da Sociedade Brasileira de Enfermeiros Pediatras
Objective To assess the feasibility of conducting a randomized clinical trial to evaluate the effectiveness of virtual reality on pain perception in children undergoing peripheral intravenous insertion, compared to traditional clinical…
View details →Negative / Null Result ReportOpen accessNeoplasms. Tumors. Oncology. Including cancer and carcinogens
Christian Borel, Caroline Even, Christophe Le Tourneau et al. · 2023 · BMJ Oncology
Objective Salivary gland cancers (SGC) are rare cancers with currently no standard treatment for recurrent/metastatic disease. Based on checkpoint inhibitors benefit in a broad range of tumours, NIvolumab in Salivary gland CArcinoma of the Head and Neck (NISCAHN) evaluated nivolumab efficacy in SGC.Methods and analysis In this phase II single-stage Fleming design, patients with SGC with a progressive disease progression within 6 months prior to entering the study, were divided into ACC (adenoid cytic carcinoma) and non-ACC. All received nivolumab for a maximum of 12 months. The primary endpoin
View details →Negative / Null Result ReportOpen accessMicrobiology
José C. Segovia, Juan C. Ramírez, Paula Río et al. · 2025 · Microbiology Spectrum
ABSTRACT Two strains of the minute virus of mice (MVM) parvovirus (of the species Protoparvovirus rodent1), named i (immunosuppressive) and p (prototype), show disparate tropism and pathogenicity in mice. Unlike the virulent MVMi, the MVMp is attenuated and infection-restricted in primary mouse hematopoietic cells; however, it does infect human transformed, established, and stem cells. We thus seek here a putative MVMp natural tropism to humans compared to MVMi. Infectious purified MVMp virions suppress in vitro the clonogenic potential of human committed (erythroid and myeloid) and primitive
View details →Negative / Null Result ReportOpen accessMedicine
Lei Huang, Tong Li, Lei Xu et al. · 2016 · Chinese Medical Journal
Background: There has been no external validation of survival prediction models for severe adult respiratory distress syndrome (ARDS) with extracorporeal membrane oxygenation (ECMO) therapy in China. The aim of study was to compare the performance of multiple models recently developed for patients with ARDS undergoing ECMO based on Chinese single-center data. Methods: A retrospective case study was performed, including twenty-three severe ARDS patients who received ECMO from January 2009 to July 2015. The PRESERVE (Predicting death for severe ARDS on VV-ECMO), ECMOnet, Respiratory Extracorpore
View details →Methods Dead-EndOpen accessMedicine (General)
Xiaohui Yang, Yue Meng, Huiyan Feng et al. · 2025 · Frontiers in Medicine
BackgroundEndometriosis is a chronic gynecological condition that can result in pelvic pain and infertility, thereby significantly impacting women's reproductive health. Psychological disorders such as anxiety and depression are common in women with endometriosis and can have a detrimental effect on their quality of life. Conventional postoperative care primarily focuses on medical and surgical aspects; however, there is a growing need to address the psychological wellbeing of patients as part of comprehensive postoperative care. Music listening interventions have emerged as a promising adjunc
View details →Abandoned HypothesisOpen accessMedicine
Kathleen F Brookfield, Michael C Cheung, Relin Yang et al. · 2009 · PLoS ONE
OBJECTIVE: Patient chances for cure and palliation for a variety of malignancies may be greatly affected by the care provided by a treating hospital. We sought to determine the effect of volume and teaching status on patient outcomes for five gynecologic malignancies: endometrial, cervical, ovarian and vulvar carcinoma and uterine sarcoma. METHODS: The Florida Cancer Data System dataset was queried for all patients undergoing treatment for gynecologic cancers from 1990-2000. RESULTS: Overall, 48,981 patients with gynecologic malignancies were identified. Endometrial tumors were the most common
View details →Negative / Null Result ReportOpen access
Dwi Gemina, Tini Kartini, Pra Gemini · 2021 · JURNAL AKUNIDA
Cooperatives are directed as a collective community effort to increase the level of economic prosperity together. The research objective was to analyze the effect of external capital, business volume and total assets on the residual…
View details →Replication FailureOpen accessMedicine
Md Habibul Ghani, Md. Shahed Morshed, Tahniyah Haq et al. · 2023 · Bangabandhu Sheikh Mujib Medical University Journal
Hypovitaminosis D (<20 ng/mL) is thought to increase insulin resistance and meta-inflammation contributing to the pathogenesis of diabetes mellitus (DM). Correcting vitamin D deficiency in people with prediabetes might halt its progression to DM. The aim of this study was to examine the effect of vitamin D supplementation on insulin resistance, glycemic status, and inflammation in prediabetic adults with vitamin D deficiency. This doubleblind randomized placebo-controlled trial was done among 27 newly detected prediabetic adults with hypovitaminosis D randomly assigned to 60,000 IU of vitamin
View details →