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11,312 real negative results, null findings, and replication failures in Medicine · Negative / Null Result Report. 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 ReportMedicine

'July effect' in management and outcomes of patients admitted with pulmonary embolism in the United States, 2016 to 2021.

Bansal M, Mehta A, Morris DL et al. · 2025 · Proceedings (Baylor University. Medical Center)

Background This study sought to assess the outcomes of pulmonary embolism (PE) admissions at teaching and nonteaching hospitals in the month of July, when new trainees begin their training in the United States. Methods During 2016-2021,…

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Negative / Null Result ReportMedicine

Assessing the in vivo impact of novel β-lactamase inhibitors on the efficacy of their partner β-lactams against serine carbapenemase-producing Pseudomonas aeruginosa using human-simulated exposures.

Ruiz VH, Gill CM, Nicolau DP · 2024 · The Journal of antimicrobial chemotherapy

Objectives To evaluate the efficacy of human-simulated regimens (HSRs) of ceftazidime, ceftazidime/avibactam, imipenem, imipenem/relebactam, meropenem and meropenem/vaborbactam in a murine thigh infection model against serine…

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Negative / Null Result ReportOpen accessMedicine

Longitudinal Changes in Sensory Processing and Clinical Outcomes During Spinal Cord and Dorsal Root Ganglion Stimulation to Treat Chronic Pain: A Pilot Study.

Rogers ER, Sankarasubramanian V, Kyi WHT et al. · 2025 · Journal of pain research

Purpose The analgesic mechanisms and neurophysiological effects of spinal cord stimulation (SCS) and dorsal root ganglion stimulation (DRGS) are poorly understood. In this pilot repeated-measures study, we used quantitative sensory testing…

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Negative / Null Result ReportMedicine

High Prevalence and Clinical Relevance of Intrapulmonary Vascular Dilatations in Patients Undergoing TIPS Implantation.

Mauz JB, Rieland H, Berliner D et al. · 2024 · Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association

Background & aims Considerate patient selection is vital to ensure the best possible outcomes after transjugular intrahepatic portosystemic shunt (TIPS) insertion. However, data regarding the impact of intrapulmonary vascular dilatations…

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Negative / Null Result ReportOpen accessMedicine

Investigation of Potential Cross-Protection Conferred by the Seasonal Influenza Vaccine Against Swine Influenza A Viruses of Pandemic Potential.

Lilley A, Chiapponi C, Prosperi A et al. · 2026 · Vaccines

Background/Objectives : Influenza A viruses cause seasonal epidemics of respiratory infections in humans, the severity of which can be mitigated by influenza vaccine use. Influenza A viruses circulating in pigs continue to pose a pandemic…

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Negative / Null Result ReportOpen accessMedicine

Semaglutide use before single-level lumbar fusion associated with fewer readmissions and 90-day costs.

Ng MK, Mastrokostas PG, Rodriguez AN et al. · 2025 · Journal of craniovertebral junction & spine

Context Semaglutide, a glucagon-like protein-1 receptor agonist used in diabetes and obesity management, has demonstrated perioperative benefits in other surgical populations. However, its role in spine surgery remains unclear. Aims This…

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Negative / Null Result ReportOpen accessMedicine

The brief pain inventory-Interference Subscale has acceptable reliability but questionable validity in acute back and neck pain populations.

Jones CMP, Lin CC, Zadro J et al. · 2024 · Brazilian journal of physical therapy

Background The Brief Pain Inventory-Interference Subscale (BPI-IS) is a subscale of the BPI assessment tool developed to rapidly assess the impact of a person's pain on their function. It is uncertain whether it has one or two factors, and…

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Negative / Null Result ReportOpen accessMedicine

Measuring differences in the ERG in myopia using the RETeval device with skin electrodes.

Stapley V, Anderson RS, Saunders K et al. · 2025 · Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)

Introduction Previous research suggests that the electroretinogram (ERG) is reduced and delayed in non-pathological myopia. However, the invasive nature of the electrode and cumbersome equipment required has prevented the widescale uptake…

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Negative / Null Result ReportOpen accessMedicine

Cleft Laterality Dental Arch Relationship Outcomes for Children with Unilateral Cleft Lip and Palate in New Zealand.

Fowler PV, Keall H, Kennedy D et al. · 2025 · The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association

ObjectivesTo investigate cleft laterality dental arch relationship outcomes of children with non-syndromic complete unilateral cleft lip and palate (UCLP) in New Zealand.DesignA retrospective nationwide study.SettingsVirtual 3D orthodontic…

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Negative / Null Result ReportOpen accessMedicine

The Localization Accuracy of Electrically Evoked Dental Sensations.

Ashaibi NA, Mason AG, Hector MP et al. · 2025 · Clinical and experimental dental research

Objectives Dental pain of odontogenic origin can be difficult to accurately locate to a specific tooth. This study aimed to determine how effectively volunteers could locate electrical stimuli applied to teeth in both the anterior and…

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Negative / Null Result ReportOpen accessMedicine

Comparison of Pharmacokinetic/Pharmacodynamic Parameters and Clinical Outcomes of Vancomycin Administered in Two Different Dosage Regimens in Patients with Acute Kidney Injury.

Soufi R, Salamzadeh J, Alavi Darazam I et al. · 2025 · Iranian journal of pharmaceutical research : IJPR

Background Vancomycin is commonly used in intensive care units (ICUs), but its optimal dosage in patients with acute kidney injury (AKI) remains uncertain. This study aimed to evaluate vancomycin's pharmacokinetic and pharmacodynamic…

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Negative / Null Result ReportOpen accessMedicine

Cognitive and Behavioral Effects of Levetiracetam in Juvenile Rats.

Ullal SD, Thomas AG, Acharya SD et al. · 2026 · Pharmacology research & perspectives

Epilepsy is a common neurologic disorder; its incidence in childhood is 2.5 per 1000 children. Levetiracetam (LEV) is an antiepileptic drug with a broad spectrum of action used in localized and generalized epilepsies in both adults and…

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Negative / Null Result ReportOpen accessMedicine

Elevated Carcinoembryonic Antigen Levels Predict Failure to Reach Surgery in Patients with Borderline Resectable Pancreatic Cancer Referred to Neoadjuvant Therapy.

Jacover A, Beller T, Mahamid N et al. · 2025 · Annals of surgical oncology

Introduction Neoadjuvant therapy (NT) is generally preferred over upfront surgery for borderline resectable pancreatic ductal adenocarcinoma (BR-PDAC), but many patients fail to reach surgical resection. This study evaluates real-world…

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Negative / Null Result ReportOpen accessMedicine

Efficacy and Safety of a Novel Rotatable Sphincterotome for Endoscopic Sphincterotomy in Patients With Roux-en-Y Gastrectomy During Balloon Enteroscopy-Assisted ERCP (With Video).

Tanisaka Y, Ryozawa S, Mizuide M et al. · 2025 · Digestive endoscopy : official journal of the Japan Gastroenterological Endoscopy Society

Endoscopic sphincterotomy (EST) is challenging for patients with surgically altered anatomy (SAA). The blades of conventional sphincterotomes designed for SAA do not always face the correct direction of EST. We aimed to evaluate the…

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Negative / Null Result ReportMedicine

The effect of dairy products on liver fat and metabolic risk markers in males with abdominal obesity - a four-arm randomized controlled trial.

Sandby K, Magkos F, Chabanova E et al. · 2024 · Clinical nutrition (Edinburgh, Scotland)

Background & aims In recent years, epidemiological studies have reported links between the consumption of fermented dairy products, such as yogurt, and health; however, evidence from human intervention trials is scarce and inconsistent. We…

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