Negative / Null Result ReportOpen accessMedicine
Kumari S, Marwah S, Manna S et al. · 2026 · Cureus
Background Combined oral contraceptives (COCs) are the cornerstone therapy for polycystic ovary syndrome (PCOS). While COCs have been shown to improve cognitive performance, the relationship between these gains and hormonal profiles,…
View details →DOI: 10.7759/cureus.108574 Negative / Null Result Report
Wu Q, Han Q, Shan X et al. · 2026 · Preprint
Abstract With the global decline of fish stocks, crustaceans have gained increasing ecological and economic significance. Portunus trituberculatus is a key crab species in the Asia-Pacific, with its highest density in China's Bohai Sea.…
View details →DOI: 10.21203/rs.3.rs-9095878/v1 Negative / Null Result ReportMedicine
Ibrahim A, Albarhawi A, Saadi A · 2026 · Georgian medical news
Background Thyroid disorders, hypothyroidism or hyperthyroidism, are frequently encountered in medical practice. Estimating the significance of MPV as an indicator of thrombotic propensity in hypothyroidism would be helpful and looking for…
Negative / Null Result ReportMedicine
Stojković B, Igić M, Jevtović Stoimenov T et al. · 2026 · Diagnostics (Basel, Switzerland)
Background/Objectives : This exploratory study aimed to investigate potential differences and associations between salivary hBD-2 levels and dental caries, as well as between unstimulated salivary pH and salivary hBD-2 levels, in children…
View details →DOI: 10.3390/diagnostics16040591 Negative / Null Result Report
Mauludin MR, Permana I, Pratamawati TM et al. · 2026 · Preprint
Abstract Down syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21, commonly referred to as trisomy 21. In 2020, its prevalence was estimated at approximately 1 in 10.000 live births. The presence of an…
View details →DOI: 10.21203/rs.3.rs-9119273/v1 Negative / Null Result ReportOpen accessMedicine
Fereydouni S, Jabbari-Azad F, Bakhshaee M et al. · 2026 · Iranian journal of otorhinolaryngology
Introduction Chronic rhinosinusitis with nasal polyps is a heterogeneous inflammatory disorder often driven by type 2 inflammation. Identification of non-invasive biomarkers, such as fractional exhaled nitric oxide (FeNO), may support the…
View details →DOI: 10.22038/ijorl.2025.88968.3979 Negative / Null Result ReportMedicine
Petrey K, Golden A, Durbin J et al. · 2026 · European journal of pain (London, England)
Background The primary objective of this study was to determine whether baseline conditioned pain modulation (CPM) is associated with pain and disability outcomes following a 6-week course of physical therapy intervention. Secondary…
View details →DOI: 10.1002/ejp.70312 Negative / Null Result ReportMedicine
Wrobel J, Jablonska E, Matuk K et al. · 2026 · Life (Basel, Switzerland)
Background The aim of the study was to investigate whether red blood cell antigens (A, B, D, C w , C, c, E, e, K, k, Jk a , Jk b , Fy a , Fy b , Le a , Le b , M, N, S, s, and P1) from clinically relevant blood group systems were associated…
View details →DOI: 10.3390/life16061038 Negative / Null Result ReportMedicine
Deniz-Şafak E, Adlım B · 2026 · BMC primary care
Objective As future healthcare providers, medical students play a critical role in the prevention, early recognition, and management of substance use disorders. However, the extent to which they are adequately prepared for this…
View details →DOI: 10.1186/s12875-026-03386-3 Negative / Null Result ReportMedicine
Patel A, Meena DS, Santhosh K et al. · 2026 · Journal of neuroimmunology
Background Neurocognitive dysfunction remains an important complication among people living with HIV (PLWH). Early identification of neurocognitive dysfunction by using the International HIV Dementia Scale (IHDS) may help in the prevention…
View details →DOI: 10.1016/j.jneuroim.2026.579001 Negative / Null Result Report
Rothell F, Nguyen MA, Xu E et al. · 2026 · Preprint
Neurolymphomatosis (NL), a rare manifestation of non-Hodgkin’s lymphoma affecting the peripheral nervous system, remains a diagnostic challenge. This study aimed to define an optimal diagnostic approach for timely and effective…
View details →DOI: 10.20944/preprints202605.1057.v1 Negative / Null Result ReportMedicine
Yasuda H, Yokota K, Katabami T et al. · 2026 · Hypertension research : official journal of the Japanese Society of Hypertension
Primary aldosteronism (PA) causes biochemical abnormalities such as hypokalemia and metabolic alkalosis. This study aimed to compare the effects of aldosterone on serum potassium and corrected bicarbonate (cHCO 3 - , defined as Na - Cl -…
View details →DOI: 10.1038/s41440-026-02609-5 Negative / Null Result ReportMedicine
Alotaibi W, Alrasheed S · 2026 · JPMA. The Journal of the Pakistan Medical Association
Objective To evaluate axial length, anterior chamber angle, anterior chamber depth, refractive errors and white-to-white corneal diameter, and to assess their inter-correlations with intraocular pressure among young individuals. Methods…
View details →DOI: 10.47391/jpma.20964 Negative / Null Result ReportOpen accessMedicine
Hsieh YT, Liao YC, Dulnuan HGP et al. · 2026 · Brain structure & function
Men typically display larger olfactory bulb (OB) volumes, while women demonstrate superior olfactory performance. Olfactory training (OT) has been shown to induce structural changes in OB, but whether sex influences OT-related plasticity…
View details →DOI: 10.1007/s00429-026-03126-4 Negative / Null Result ReportMedicine
Baharnoori M, Glanz B, Polgar-Turcsanyi M et al. · 2026 · Journal of the neurological sciences
Background Serum neurofilament light chain (sNfL) and glial fibrillary acidic protein (sGFAP) are promising biomarkers for Multiple Sclerosis (MS) disease activity. There is less known about their association with the symptomatic…
View details →DOI: 10.1016/j.jns.2026.125786 Negative / Null Result ReportOpen accessMedicine
Alhosseini R, Aghaie M, Ghorbani S et al. · 2026 · BMC research notes
BACKGROUND: Osteoporosis is a common bone disorder characterized by decreased bone density. Interleukin-6 (IL-6), plays a crucial role in bone homeostasis. This study aimed to evaluate the relationship between serum levels of IL-6 and…
View details →DOI: 10.1186/s13104-026-07811-9 Negative / Null Result ReportMedicine
Etemadifar M, Bagheri S, Dehghani A et al. · 2026 · Multiple sclerosis and related disorders
Background Multiple sclerosis (MS) prevalence varies worldwide and appears to be rising in Iran. Environmental factors like air pollution have been hypothesized to contribute to MS risk. This study aimed to map MS prevalence across Isfahan…
View details →DOI: 10.1016/j.msard.2026.107025 Negative / Null Result Report
Mrkonjić R, Šribar A, Rudež I et al. · 2026 · Preprint
Background: Cardiac troponin I (TnI) is the reference biomarker for detecting myocardial injury. Saliva has recently emerged as a potential non-invasive diagnostic fluid; however, evidence regarding the clinical utility of salivary TnI…
View details →DOI: 10.20944/preprints202606.0114.v1 Negative / Null Result ReportMedicine
Lan P, Lan T · 2026 · Metabolic syndrome and related disorders
Background Hyperlipidemia constitutes a systemic metabolic disorder. The correlation of cardiovascular disease [CVD] with the triglyceride-glucose index [TyG] in individuals with hyperlipidemia remains unclear. The current study examined…
View details →DOI: 10.1177/15578518251413507 Negative / Null Result ReportMedicine
Gahukamble A, Arikrishnan AM, Thuppale VE et al. · 2026 · Journal of pediatric orthopedics
Background Distal femoral extension osteotomy (DFEO) is an established surgical option for correcting knee flexion deformity (KFD) in children with cerebral palsy. However, the extension deformity created at the distal femur may remodel…
View details →DOI: 10.1097/bpo.0000000000003347 Negative / Null Result ReportMedicine
Almukhlifi Y, Alharbi A, Alghamdi L et al. · 2026 · Scientific reports
Emergency Medical Services (EMS) trainees are exposed to multiple occupational hazards during their training; however, the extent to which their awareness translates into safe professional behaviours remains unclear. This study aimed to…
View details →DOI: 10.1038/s41598-026-56329-4 Negative / Null Result Report
Elrefaey R, Abdelsalam AI, Yara M et al. · 2025 · Preprint
Abstract Background Galectin-3 demonstrates multifunctionality with diverse biological roles. Its potential as a biomarker for inflammation and renal fibrosis has gathered attention. The renal doppler is commonly used as a guide for…
View details →DOI: 10.21203/rs.3.rs-7374078/v1 Negative / Null Result ReportMedicine
Sharma A, Nateghi R, Ayad M et al. · 2026 · Placenta
Introduction The placenta forms a critical barrier to infection through pregnancy, labor and, delivery. Acute placental inflammation in the membranes, diagnosed as Maternal Inflammatory Response (MIR), has short-term, and long-term…
View details →DOI: 10.1016/j.placenta.2026.05.028 Negative / Null Result ReportMedicine
Bandola AM, Wang MH, Guo BF et al. · 2026 · Marine pollution bulletin
Phthalate esters (PAEs) and microplastics (MPs) are emerging contaminants in aquatic environments. However, their co-occurrence in wetland sediments remains poorly understood. This study aimed to quantify PAE concentrations and MP…
View details →DOI: 10.1016/j.marpolbul.2026.119988 Negative / Null Result Report
Ibrahim EA, Alper E · 2026 · Preprint
Abstract Purpose: PSMA PET/CT has transformed prostate cancer management, yet its diagnostic utility is not absolute. It fails to detect PSMA-suppressed disease variants, including treatment-induced neuroendocrine prostate cancer (t-NEPC)…
View details →DOI: 10.21203/rs.3.rs-9598282/v1 Negative / Null Result ReportMedicine
Yokoyama S, Shimada M, Nakagawa J et al. · 2026 · European journal of drug metabolism and pharmacokinetics
Background and objective Vadadustat, an oral hypoxia-inducible factor prolyl hydroxylase inhibitor, is transported into hepatocytes via OATP1B1, which is encoded by the SLCO1B1 gene. Although interindividual variability in vadadustat…
View details →DOI: 10.1007/s13318-026-01005-1 Negative / Null Result ReportMedicine
Chen Y, Ren Z, Yan J et al. · 2026 · Urology
Objective To elucidate the association of endogenous circulating testosterone and its related substances with the onset and severity of stress urinary incontinence (SUI) in postmenopausal women. Patients and methods A comparative analysis…
View details →DOI: 10.1016/j.urology.2026.04.047 Negative / Null Result ReportMedicine
Sayur V, Uc C, Baki B et al. · 2026 · Hernia : the journal of hernias and abdominal wall surgery
Background and aim With the increasing use of digital platforms in surgical education, YouTube has become a widely accessible resource for trainees. However, the absence of peer review raises concerns regarding the reliability and…
View details →DOI: 10.1007/s10029-026-03721-8 Negative / Null Result ReportOpen accessMedicine
Koca SB, Kırkgöz T, Kara L et al. · 2026 · BMC endocrine disorders
BACKGROUND: Spexin has an inhibitory effect on the hypothalamus (GnRH expression), pituitary (LH and FSH expression) and ovary (estradiol expression). However, Phoenixin potentiate GnRH-stimulated GnRH receptor expression. Our aim is to…
View details →DOI: 10.1186/s12902-026-02268-0 Negative / Null Result Report
Çiğri E, Çatan İnan F, Gülten S et al. · 2026 · Preprint
Objective: In the present study, cardiovascular risk indices (Atherogenic Index of Plasma [AIP], Atherogenic Coefficient [AC], Castelli Risk Index-1 [CRI-1], and Castelli Risk Index-2 [CRI-2]) and bone mineral density (BMD SDS) were…
View details →DOI: 10.20944/preprints202605.2036.v1 