Negative / Null Result Report
Alani AH, Ahmed D, Al-obaidi QA et al. · 2026 · Preprint
Recently, studies have focused on producing green, sustainable concrete with improved environmental performance, utilizing recycled waste materials. The early compressive strength of Green High Strength Concrete (GHSC) containing up to 60%…
View details →DOI: 10.12688/f1000research.175237.4 Negative / Null Result ReportOpen accessMedicine
Mattelaer N, David S, Steenackers N et al. · 2026 · International journal of endocrinology and metabolism
Background Dopamine is an essential neurotransmitter involved in motivation and reward. In obesity, altered dopaminergic responses to food may drive excess energy intake, implicating dopamine in the pathophysiology of obesity.…
View details →DOI: 10.5812/ijem-166881 Negative / Null Result ReportMedicine
Zhu L, Thungjaroenkul P, Abhicharttibutra K et al. · 2026 · Journal of nursing measurement
Background and Purpose: Patient participation is fundamental to modern health care. No validated instrument exists to assess nurses' performance in enhancing patient participation within Chinese health care. This study developed and…
View details →DOI: 10.1891/jnm-2025-0169 Negative / Null Result ReportMedicine
Takla MKN, Rageh MRM, Aboalata MAM et al. · 2026 · Journal of back and musculoskeletal rehabilitation
BackgroundRecurrent hamstring strain injuries are associated with deficits in eccentric strength and altered muscle-tendon extensibility, which may persist and contribute to reinjury risk.ObjectiveTo examine the relationship between…
View details →DOI: 10.1177/10538127261462651 Negative / Null Result Report
Wang X, Dong X, Xu X et al. · 2026 · Preprint
Abstract Background Short-video platforms in China have evolved into primary digital health information channels. Their algorithm-driven ecosystems raise critical questions about the quality and reach of specialized medical content, such…
View details →DOI: 10.21203/rs.3.rs-9907291/v1 Negative / Null Result Report
Peña-González I, Roldán A, Barquero BL et al. · 2026 · Preprint
Background: Inter-limb asymmetry has been widely studied as a potential determinant of physical performance in able-bodied athletes; however, its functional relevance in athletes with neurological impairments such as spastic hemiparesis…
View details →DOI: 10.20944/preprints202606.1603.v1 Negative / Null Result Report
Alwahbi Z, Asiri A · 2026 · Preprint
Abstract Purpose To assess the level of knowledge regarding ADHD among primary pediatric care providers and to identify factors associated with higher or lower knowledge levels in the southern region of Saudi Arabia in 2026. Methods This…
View details →DOI: 10.21203/rs.3.rs-9912726/v1 Negative / Null Result ReportMedicine
Solera-de-Andrés C, Spang-Valencia P, Peralta-Calvo J · 2026 · The British journal of ophthalmology
Background Retinoblastoma (RB) treatment aims to ensure survival, globe preservation and visual function. Intra-arterial chemotherapy (IAC) has improved globe salvage, but there remains limited information on visual outcomes following this…
View details →DOI: 10.1136/bjo-2025-328113 Negative / Null Result ReportMedicine
Militsi E, Reingewirtz Y, Séverac F et al. · 2026 · Oral diseases
Background This study assessed the feasibility of remote halitosis diagnosis by evaluating VSC stability over 7 days and their association with periodontal parameters. Methods One hundred adult patients attending a periodontal examination…
View details →DOI: 10.1111/odi.70394 Negative / Null Result ReportMedicine
Durgin FH, Love A, Taylor G et al. · 2026 · Journal of experimental psychology. Human perception and performance
To dissociate density-based and number-based explanations of the aftereffects affecting visually perceived numerosity, a preregistered psychophysical experiment was conducted with 60 participants. The experiment was designed to address a…
View details →DOI: 10.1037/xhp0001434 Negative / Null Result ReportMedicine
Martini JD, Xavier de Araujo F, Teixeira C · 2026 · Respiratory care
Background We sought to evaluate the prevalence and factors associated with diaphragmatic dysfunction using bedside ultrasound in critically ill subjects undergoing invasive mechanical ventilation in pressure-support ventilation (PSV)…
View details →DOI: 10.1177/19433654261450623 Negative / Null Result ReportMedicine
Song CH, Chang YC · 2026 · Acta paediatrica (Oslo, Norway : 1992)
Aim To investigate baseline pneumococcal antibody levels and the influence of allergic sensitization in children under age six with recurrent respiratory infections. Methods We conducted a retrospective analysis of 38 fully immunised…
View details →DOI: 10.1111/apa.70514 Negative / Null Result ReportOpen accessMedicine
Gathof A, Jahaj L, Patalano S et al. · 2025 · ACS omega
The concentrations of organophosphate esters (OPEs) in atmospheric particulate matter (PM) collected every 6 days at two sites across Providence, Rhode Island (Providence College, PC, and the Port of Providence, Port) are reported for the…
View details →DOI: 10.1021/acsomega.5c07462 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 