Negative / Null Result ReportOpen accessCytology
Weijie Cao, Xingang Li, Xiaoyu Zhang et al. · 2019 · Cells
Background: Epidemiological studies observing inconsistent associations of telomere length (TL) with ischemic stroke (IS) are susceptible to bias according to reverse causation and residual confounding. We aimed to assess the causal association between TL, IS, and the subtypes of IS, including large artery stroke (LAS), small vessel stroke (SVS), and cardioembolic stroke (CES) by performing a series of two-sample Mendelian randomization (MR) approaches. Methods: Seven single nucleotide polymorphisms (SNPs) were involved as candidate instrumental variables (IVs), summarized from a genome-wide m
View details →Negative / Null Result ReportOpen accessPublic aspects of medicine
Batoul Ghosn, Leila Azadbakht, Mohammad Reza Monazzam Esmaeilpour et al. · 2024 · BMC Public Health
Abstract Background Despite numerous studies that have explored the association between individual antioxidants or specific combinations and the risk of hearing loss, there is lack of information regarding the relationship between dietary total antioxidant capacity (dTAC) and hearing loss. The conflicting results on this association further highlight the need for more research in this area. This study aims to investigate the association between overall dietary antioxidant intake and the risk of hearing loss among Iranian adults. Methods This cross-sectional study recruited 3443 adult participa
View details →Negative / Null Result ReportOpen accessMedicine
Muhammad Hussain Iqbal, Tanveer Hussain, Fariha Khalid et al. · 2020 · Pakistan Armed Forces Medical Journal
Objective: To determine the frequency of diastasis recti abdominis and its associated risk factors in postpartum women. Study Design: Cross-sectional study. Place and Duration of Study: Omar Medical Center Lahore, Yaseen Medical Center Lahore and Social Security Hospital Lahore, from Sep 2019 to Dec 2019. Methodology: This study included 128 participants fulfilling the eligibility criteria. The assessment of diastasis recti abdominis was done manually by a female physiotherapist using single finger, double finger and three finger methods on abdomen at three levels: at the umbilicus, 4.5 cm bel
View details →Negative / Null Result ReportOpen accessImmunologic diseases. Allergy
Mohammad Mehrazmay, Ensi Khalili Pouya, Elham Keshavarz · 2021 · Journal of Kerman University of Medical Sciences
Background: Breast cancer is a major health problem in Iran with increasing incidence in the recent years. Breast density is one of the most important risk factors for developing breast cancer. Metabolic syndrome that is defined by the presence of multiple clinical and lab data findings has also been shown to be related with breast cancer.Methods: A sample of 246 cases who referred to Mahdiyeh hospital in Tehran were selected according to the inclusion criteria and a form was prepared including breast density in the screening mammogram done in our center and recent lab tests including FBS, HDL
View details →Short NoteOpen accessMedicine
Camelia C. Diaconu · 2019 · Archives of the Balkan Medical Union
Oxidative stress is involved in the pathophysiology of many chronic diseases, including heart failure. Oxidative stress is an imbalance between the production of reactive oxygen species (ROS) and the antioxidant defense. The overproduction of ROS can lead to cellular damage and eventually cellular death. This applies also in patients with chronic heart failure, who present a dramatic increase of oxidative stress associated with a pronounced decrease of the antioxidant defense mechanisms. The components of the antioxidant defense mechanism of myocardial cells are superoxide dismutase (SOD), cat
View details →Negative / Null Result ReportOpen accessSurgery
Farzaneh Dasturian, Nadereh Naderi, Gholamreza Farshidfar et al. · 2020 · Brazilian Journal of Cardiovascular Surgery
Abstract Objective: To investigate the association between interleukin-35 (IL-35) levels and single nucleotide polymorphisms (rs3761548, rs3761547) of the FoxP3 gene in coronary artery bypass grafting (CABG) patients. Methods: We conducted a prospective study including 140 patients, who were scheduled for elective isolated on-pump CABG with cardiopulmonary bypass (CPB) from January 2017 to September 2018 in the Jorjani heart center. Blood samples were collected before and 12 hours after the operation. Serum levels of IL-35 were measured by enzyme-linked immunosorbent assay and the pattern of g
View details →Negative / Null Result ReportOpen accessDiseases of the musculoskeletal system
Hye‐Sun Park, Sang Ho Park, Yeseul Seong et al. · 2024 · Journal of Cachexia, Sarcopenia and Muscle
Abstract Background The association between the adiponectin‐to‐leptin ratio (A/L ratio) and the risk of incident chronic kidney disease (CKD) is poorly understood. This study aimed to investigate the association between A/L ratio and the risk of incident CKD and to examine whether such a relationship varied according to sex and body composition. Methods In this prospective community‐based cohort, participants with normal kidney function were analysed (N = 5192). The association between the A/L ratio at baseline and the risk of incident CKD, defined as two or more occasions with an estimated gl
View details →Failed Experiment ReportMedicine
Lertwiram P, Fuangfa P, Kijkunasathian C et al. · 2026 · Scientific reports
Arthroscopic rotator cuff repair (ARCR) generally improves clinical outcomes, but the impact of pre-existing glenohumeral osteoarthritis (GHOA) severity on these outcomes remains unclear. This study aims to evaluate the correlation between…
View details →Negative / Null Result ReportMedicine
Li L, You C, Yan X et al. · 2026 · Echocardiography (Mount Kisco, N.Y.)
Background Little is known about the differences in left atrial (LA) volume and strain assessed with two-dimensional (2DE) and three-dimensional echocardiography(3DE). Therefore, this study aimed to compare 2DE and 3DE parameters in…
View details →Negative / Null Result ReportMedicine
Kralj R, Barčot Z, Kurtanjek M et al. · 2026 · Journal of burn care & research : official publication of the American Burn Association
The primary aim of this study was to determine whether a significant correlation exists between the relative decline in serum concentrations of interleukin-6 (IL-6) and interleukin-8 (IL-8) between the third and eighth days after injury…
View details →Negative / Null Result Report
Cadiz MRM, Amin-Ong AJ, Prodigalidad-Jabson LT · 2026 · Preprint
Objective: To determine the incidence and risk factors associated with mesh erosion in urogynecologic procedures performed over a ten-year period in a tertiary training hospital in the Philippines. Design: Retrospective cohort study.…
View details →Negative / Null Result ReportMedicine
Vasiliu RD, Porojan L, Bejan FR et al. · 2026 · Polymers
The optical stability and aesthetic performance of dental polymers are critical for the longevity of restorative treatments. This study aims to evaluate the influence of different polymerisation conditions and maintenance…
View details →Negative / Null Result Report
Fan S · 2026 · Preprint
Abstract Objective This research aims to explore the causes of flatfoot, hallux valgus, and accessory navicular conditions within this specific group by conducting a digital morphological examination of foot CT scans from adolescents…
View details →Negative / Null Result ReportMedicine
Yaka H, Küçükşen MF, Adem A et al. · 2026 · Early human development
Background Adolescent idiopathic scoliosis (AIS) exhibits a marked sexual dimorphism, with females up to ten times more likely than males to develop curves exceeding 30°, strongly implicating sex hormone signalling in its pathogenesis. The…
View details →Negative / Null Result ReportOpen accessInfectious and parasitic diseases
Watheq Thabet Taher, Amen A. Bawazir, Talal A. Sallam et al. · 2023 · BMC Infectious Diseases
Abstract Background Healthcare workers (HCWs) are at a higher risk of contracting COVID-19 due to their close contact with infected patients. However, the true burden of COVID-19 among HCWs in Yemen is unknown due to the inadequate availability of healthcare and the subclinical nature of the disease. This study aims to estimate the seroprevalence of SARS-CoV-2 infection among HCWs in two Yemeni governorates and identify associated factors using a cross-sectional design. Method A total of 404 HCWs were surveyed from June 2022 to September 2022 in Lahj and AL-Dhalea hospitals. A self-administere
View details →Negative / Null Result ReportOpen accessMedicine
Abida Shaheen, Syed Mahboob Alam, Fahad Azam et al. · 2022 · PLoS ONE
Background and objective Gabapentinoids are the first-line drugs for neuropathic pain. These drugs are the substrate of organic cation transporter (OCTN1) for renal excretion and absorption across the intestinal epithelium. Gabapentinoids exhibit wide interindividual variability in daily dosage and therapeutic efficacy which makes titration regimens prolonged for optimal efficacy. The present study aimed to investigate the possible influence of the single nucleotide polymorphism (SNP) of OCTN1 on therapeutic efficacy and safety of gabapentinoids in neuropathic pain patients of the Pakistani po
View details →Negative / Null Result ReportOpen accessMedicine
Al-mustafa Mahmoud, Massad Islam, Alsmady Moaath et al. · 2010 · Saudi Journal of Kidney Diseases and Transplantation
Vertical infraclavicular brachial plexus block is utilized in patients with chronic renal failure at the time of creation of an arterio-venous fistula (AVF). The aim of this study is to test the effect of impaired renal function, with the resulting deranged serum electrolytes and blood gases, on the success rate and the onset of action of the local anesthetics used. In this prospective clinical study, we investigated the effect of the serum levels of sodium, potassium, urea, crea-tinine, pH, and bicarbonate on the onset of action of a mixture of lidocaine and bupivacaine administered to create
View details →Negative / Null Result ReportOpen accessImmunologic diseases. Allergy
Cécile Gonnin, Michelle Leemans, Florence Canoui-Poitrine et al. · 2024 · Immunity & Ageing
Abstract Background Immune ageing complicates cancer treatment in older individuals. While immunotherapy targeting the PD-1/PD-L1 pathway can reinvigorate T cells, these cells tend to become senescent with age. This study investigates different CD8+ T cell subsets usually associated with senescence, in cancer patients over 70 years old who are undergoing anti-PD-1/PD-L1 immunotherapy, and examines the relationship between these senescent cells and prior chemotherapy exposure. We analyzed data from the Elderly Cancer Patient (ELCAPA) cohort, which included 35 patients enrolled between March 201
View details →Negative / Null Result ReportOpen accessDiseases of the endocrine glands. Clinical endocrinology
Yina Piao, Mengxia Jin · 2026 · Therapeutic Advances in Endocrinology and Metabolism
Background: Stress-induced hyperglycemia ratio (SHR) has shown strong correlations with diabetes risk. However, its relationship with gestational diabetes mellitus (GDM) remains an area of limited research. Objective: Based on the National Health and Nutrition Examination Survey (NHANES) database, this cross-sectional study aims to explore the association between SHR and GDM. Methods: The study included 461 pregnant women from NHANES between 1999 and 2016. Logistic regression analysis was performed to investigate the relation between SHR and GDM, as well as the weighted tertiles of SHR. Strati
View details →Negative / Null Result ReportOpen accessMicrobiology
Tony H. Chang, Julie D. Pourtois, Naomi L. Haddock et al. · 2025 · mSphere
ABSTRACT Lysogenic bacteriophages can integrate their genome into the bacterial chromosome in the form of a prophage and can promote genetic transfer between bacterial strains in vitro. However, the contribution of lysogenic bacteriophages to the incidence of antimicrobial resistance (AMR) in clinical settings is poorly understood. Here, in a set of 186 clinical isolates of Pseudomonas aeruginosa collected from respiratory cultures from 82 patients with cystic fibrosis, we evaluate the links between prophage counts and both genomic and phenotypic resistance to six anti-pseudomonal antibiotics:
View details →Negative / Null Result ReportMedicine
Selma Celen Yuceturk, Sumeyye Aydogan Turkoglu, F. Kockar et al. · 2021 · Zeitschrift für Naturforschung C - A Journal of Biosciences
Abstract In this study, the chemical composition, antimicrobial, antioxidant, and anticancer effects of Thymus convolutus Klokov oil and its main compound camphor were investigated. The oil was isolated from T. convolutus using…
View details →Negative / Null Result ReportOpen accessDentistry
Song Cai, SiYu Li, YaShi Zhou et al. · 2024 · BMC Oral Health
Abstract Background Sedentary behavior (SB) may contribute to obesity and lower extremity fluid retention, which may favor the development of obstructive sleep apnea (OSA). However, linking sedentary behavior to OSA is unclear. The purpose of this study was to determine if there is an association between SB and OSA. Methods Three typical questions in the NHANES questionnaire(①The frequency of feeling excessively sleepy per month. ②The frequency of gasping, snorting or stopping breathing per week. ③The frequency of snoring per week.) have been used for the assessment of OSA. A physical activity
View details →Negative / Null Result ReportOpen accessDermatology
Jie Gao, Linting Wei, Xinghan Liu et al. · 2017 · Kidney & Blood Pressure Research
Background/Aims: IFN-γ was reported to be involved in the development and progression of Immunoglobulin A nephropathy (IgAN), however, few studies have investigated the association between IFN-γ polymorphisms and IgAN. Therefore, we performed a case-control study to assess the association between IFN-γ polymorphisms and the risk of IgAN. Methods: Sequenom MassARRAY was used to genotype two SNPs (rs1861494 and rs2430561) in 351 patients with IgAN and 310 healthy controls. Associations were evaluated as odd ratios (OR) with 95% confidence intervals (CI). Results: No association was found between
View details →Negative / Null Result ReportOpen accessMedicine
Anjali B Susan, Uttam B George, Jeyaraj D Pandian · 2022 · Journal of Clinical and Diagnostic Research
Introduction: Arterial Spin Labeling-Perfusion Weighted Imaging (ASL-PWI) assesses cerebral blood flow using magnetically labeled inflowing arterial blood water protons as freely diffusible tracer without exogenous contrast agent. Seizures are one of the sequelae of stroke with its mechanism not well studied. Aim: Qualitative assessment of cerebral perfusion in post stroke seizure patients using ASL-PWI and comparison of perfusion patterns in post stroke seizure patients and stroke patients. Materials and Methods: This was a case-control study among 100 stroke patients who underwent Magnetic R
View details →Negative / Null Result ReportOpen accessNeoplasms. Tumors. Oncology. Including cancer and carcinogens
Sung Ui Jung, Kwang Kuk Park, Song I Yang et al. · 2014 · Korean Journal of Clinical Oncology
Purpose: Mutations in the p53 gene and accumulation of p53 protein are the most common genetic events in gastric carcinomas. This study evaluates the association of p53 gene expression with clinicopathologic findings and prognosis of gastric cancer patients who underwent curative resection. Methods: Retrospective analysis was performed on 236 consecutive patients with gastric cancer who underwent surgery at the Kosin University Gospel Hospital between December 2011 and September 2012. Nuclear p53 expression was detected by immunohistochemistry. Results: p53 expression was detected in 213 patie
View details →Negative / Null Result ReportOpen accessMedicine
Zoya maqsood , Shahid Jamal Siddiqui, Nimarta Bai et al. · 2025 · Journal of the Dow University of Health Sciences
Objective: To determine the frequency of raised intraocular pressure (IOP) following neodymium-doped yttrium aluminum garnet (Nd:YAG) laser capsulotomy in pseudophakic patients and to compare outcomes between high- and low-energy procedures. Methods: This descriptive cross-sectional study was conducted at the Department of Ophthalmology, Khairpur Medical College / Civil Hospital, Khairpur Mirs, Pakistan from April to September 2024. A total of 139 pseudophakic patients with posterior capsular opacification (PCO) undergoing Nd:YAG capsulotomy were enrolled. Baseline demographic and clinical dat
View details →Negative / Null Result ReportOpen accessOphthalmology
Sepehr Feizi, Mohammad Ali Javadi · 2019 · Journal of Ophthalmic & Vision Research
Purpose: To evaluate the effects of donor graft thickness on postoperative best spectacle-corrected visual acuity (BSCVA), refractive outcomes, endothelial cell density (ECD) and function, intraocular pressure (IOP), and postoperative complications after Descemet stripping automated endothelial keratoplasty (DSAEK). Methods: This retrospective, interventional case series enrolled 77 eyes of 64 patients who underwent DSAEK with or without simultaneous cataract surgery. Clinical outcomes, including BSCVA, refraction, keratometric astigmatism, IOP, and ECD were assessed at the final follow-up exa
View details →Negative / Null Result ReportOpen accessIndustrial safety. Industrial accident prevention
Ridha Ramayanti · 2017 · The Indonesian Journal of Occupational Safety and Health
ABSTRACT Work fatigue is condition which some factors have interaction with the workers. Fatigue may occur in the workforce by various factors, such as nutritional status and work climate. This study was conducted to analyze the relationship between nutritional status and work climate with work fatigue in Hikmah Food Catering. This was an observational analytic study using a cross sectional design. Samples size 43 peoples were taken by simple random sampling method. The correlation between the dependent and independent variables were analyzed by spearman correlation test (α = 0,05). Work clima
View details →Negative / Null Result ReportOpen accessDiseases of the endocrine glands. Clinical endocrinology
Yoriko Heianza, Lu Qi, Marly Augusto Cardoso et al. · 2020 · BMJ Open Diabetes Research & Care
Exposure to different air pollutants has been linked to type 2 diabetes mellitus, but the evidence for the association between air pollutants and gestational diabetes mellitus (GDM) has not been systematically evaluated. We systematically retrieved relevant studies from PubMed, Embase, and the Web of Science, and performed stratified analyses and regression analyses. Thirteen studies were analyzed, comprising 1 547 154 individuals from nine retrospective studies, three prospective studies, and one case–control study. Increased exposure to particulate matter ≤2.5 µm in diameter (PM2.5) was not
View details →Negative / Null Result ReportOpen accessMedicine
Ayman Mohammed Baabdullah, Abdulmalik Ghassan Abumohssin, Yara Aedh Alqahtani et al. · 2019 · Journal of Nature and Science of Medicine
Background: The use of smartphones has increased exponentially. Excessive usage of smartphones has been shown to have a negative impact on ocular health. This study aimed to evaluate the relationship between smartphone addiction and dry eye disease (DED) and determine the risk factors of DED in participants associated with smartphone addiction. Materials and Methods: This cross-sectional study was conducted in May 2017. Participants were selected from the Faculty of Medicine at King Abdulaziz University in Jeddah, Saudi Arabia. Stratified random sampling technique was used to recruit participa
View details →