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20,240 real negative results, null findings, and replication failures · 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 ReportOpen accessMedicine

Physical Activity and Sedentary Behavior in Children With Congenital Heart Disease

C. Voss, S. Duncombe, Paige H. Dean et al. · 2017 · Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease

Background Children with congenital heart disease (CHD) are thought to have low levels of physical activity (PA), but few studies have used objective measures of PA in this population. Methods and Results We recruited patients with mild,…

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Negative / Null Result ReportMedicine

Study on Normal Laryngeal Electromyography of Thyroarytenoid Muscle, Cricothyroid Muscle, and Posterior Cricoarytenoid Muscle

Xinlin Xu, Pan Yang, P. Zhuang et al. · 2018 · Annals of Otology, Rhinology and Laryngology

Objective: The aim of this study was to investigate the physiological activity of intrinsic laryngeal muscle under different functional states of larynx by measuring the normal laryngeal electromyography parameters. Methods: Laryngeal…

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Negative / Null Result ReportOpen accessMedicine

GlideScope® versus C-MAC®(D) videolaryngoscope versus Macintosh laryngoscope for double lumen endotracheal intubation in patients with predicted normal airways: a randomized, controlled, prospective trial

P. Huang, Renlong Zhou, Zhi-juan Lu et al. · 2020 · BMC Anesthesiology

Background The double lumen endotracheal tube (DLT) is the most widely-used device for single lung ventilation in current thoracic anesthesia practice. In recent years, the routine application of the videolaryngoscope for single lumen…

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Negative / Null Result ReportOpen accessMedicine

Discrepancies between leg-to-leg bioelectrical Impedance analysis and computerized tomography in abdominal visceral fat measurement

Hsueh-Kuan Lu, Yu-Ywan Chen, Chin-Jung Yeh et al. · 2017 · Scientific Reports

The aim of this study was to evaluate leg-to-leg bioelectrical impedance analysis (LBIA) using a four-contact electrode system for measuring abdominal visceral fat area (VFA). The present study recruited 381 (240 male and 141 female)…

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Negative / Null Result ReportOpen accessMedicine

Comparison of corneal changes after phacoemulsification using BSS Plus versus Lactated Ringer's irrigating solution: a prospective randomised trial

D. R. Lucena, M. S. Ribeiro, A. Messias et al. · 2010 · British Journal of Ophthalmology

Background/aims To compare two intraocular irrigating solutions, Balanced Salt Solution Plus (BSS Plus) versus Lactated Ringer's (Ringer), for the preservation of corneal integrity after phacoemulsification. Methods 110 patients undergoing…

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Negative / Null Result ReportOpen accessComputer Science

Shaping Ability of Different Single Niti Files: A Cbct Assessment

B. Selivany, A. Yousif · 2020 · The Journal Of Duhok University

Aim : The study aimed to compare Shaping ability of WaveOne Gold, Reciproc Blue and 2Shape NiTi systems having different design and metallurgic properties. Method : Forty five extracted human single root with 10 mm root length were…

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Negative / Null Result ReportMedicine

Repeatability and comparability of a new swept-source optical coherence tomographer in optical biometry.

C. E. Monera Lucas, J. Escolano Serrano, C. T. Tarazona Jaimes et al. · 2022 · Archivos de la Sociedad Española de Oftalmología

PURPOSE To evaluate the reproducibility in the measurement of ocular biometric parameters using a new swept-source optical coherence tomographer and its comparability with an optical low coherence reflectometry biometer. DESIGN An…

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Negative / Null Result ReportOpen accessMedicine

Early stage adrenocortical carcinoma—what contributes to poor prognosis after adrenalectomy? A retrospective cohort study

Douk Kwon, C. Rah, Byung-Chang Kim et al. · 2024 · Annals of Surgical Treatment and Research

Purpose Adrenocortical carcinoma (ACC) is a rare primary carcinoma originating in the adrenal gland with a poor prognosis and a high recurrence rate. This study evaluated the risk factors associated with recurrence in patients with early…

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Negative / Null Result ReportMedicine

Dehorning Does Not Alter the Stress Response in Southern White Rhinoceroses (Ceratotherium simum simum) during Transport: A Preliminary Investigation

Anita Metzinger, Leith C. R. Meyer, P. Buss et al. · 2024 · Journal of Wildlife Diseases

Abstract: Translocation and dehorning are common and important practices for rhinoceros management and conservation. It is not known if dehorning causes a stress response or negatively affects rhinoceroses during transport. Twenty-three…

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Negative / Null Result ReportOpen accessMedicine

Ventilation during continuous compressions or at 30:2 compression-to-ventilation ratio results in similar arterial oxygen and carbon dioxide levels in an experimental model of prolonged cardiac arrest

Jukka Kopra, E. Litonius, P. Pekkarinen et al. · 2023 · Intensive Care Medicine Experimental

Background In refractory out-of-hospital cardiac arrest, transportation to hospital with continuous chest compressions (CCC) from a chest compression device and ventilation with 100% oxygen through an advanced airway is common practice.…

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Negative / Null Result ReportMedicine

Effect of Volume on Postoperative Outcomes After Left Pancreatectomy: A Multicenter Prospective Snapshot Study (SPANDISPAN Project)

D. Aparicio-López, J. Ramia, C. Villodre et al. · 2025 · Journal of Clinical Medicine

Background/Objectives: Like many other countries, the management of pancreatic cancer in Spain has developed in a fragmented manner. This study analyzes clinical outcomes related to patient volume at different centers after left…

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Negative / Null Result ReportOpen accessMedicine

The Effect of Two Calcium Silicate Materials on the Fracture Strength of Simulated Immature Teeth during Regenerative Endodontic Treatment

H. Edrees, A. Y. Siddiqui, M. M. Almousa et al. · 2021 · Journal of Evolution of Medical and Dental Sciences

BACKGROUND Necrotic immature permanent teeth undergoing Regenerative Endodontic Treatment (RET) are subjected to functional forces that might lead to their fracture before achieving apical closure. This study compared the fracture strength…

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Negative / Null Result ReportMedicine

A Half-Century Review of Male and Female Resident Outcomes in Oral and Maxillofacial Surgery: A Single-Institution Report.

Susan Keefe, Carrie Baldwin, Elda Fisher et al. · 2025 · Journal of oral and maxillofacial surgery

BACKGROUND Limited comprehensive historical data exist comparing male and female residents in oral and maxillofacial surgery (OMS) residency programs. This gap underscores the need to examine sex-based differences to guide equitable…

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Negative / Null Result ReportOpen access

Entry Requirements as Predictors of the Academic Performance of Postgraduate Students in Universities in Zimbabwe

Norman Rudhumbu, Patience Kelebogile Mudau · 2022 · International Journal of Learning, Teaching and Educational Research

One of the major strategies that universities use to ensure quality in education is the use of entry requirements as a screening procedure to ensure that only those considered to be the ‘best’ students are admitted. Whether these so-called…

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Negative / Null Result ReportMedicine

The Effect of the Lateral First Metatarsal Head Shape on Hallux Valgus in Forced Turnout in Pre-Pointe Female Ballet Dancers: A Pilot Study.

Paul H Doan, David M Handojo, Shivani Parihar et al. · 2024 · Journal of the American Podiatric Medical Association (Print)

BACKGROUND A rounded lateral first metatarsal head shape is associated with higher rates of hallux abducto valgus recurrence following corrective surgery; however, the effect of the lateral first metatarsal head shape on the hallux…

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Negative / Null Result ReportOpen accessMedicine

A Benchmark Side-by-Side Comparison of Two Well-Established Protocols for in vitro Hematopoietic Differentiation From Human Pluripotent Stem Cells

F. Gutiérrez-Agüera, Virginia C. Rodríguez-Cortez, P. Petazzi et al. · 2021 · Frontiers in Cell and Developmental Biology

The generation of transplantable hematopoietic stem cells (HSCs) from human pluripotent stem cells (hPSCs) remains challenging. Current differentiation protocols from hPSCs generate mostly hematopoietic progenitors of the primitive…

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Negative / Null Result ReportMedicine

Which clinical factors and biochemical parameters differentiate major depressive disorder with versus without lifetime psychotic symptoms?

C. M. Esposito, F. Legnani, J. Barkin et al. · 2026 · International journal of psychiatry in clinical practice

OBJECTIVE Major depressive disorder (MDD) is a prevalent disabling condition, with psychotic features complicating its course and management. Purpose of the study is to identify clinical and biochemical factors differentiating psychotic…

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Negative / Null Result ReportOpen accessPsychology

The Effects of a Structured and Unstructured Kindergarten Program on the Readiness Scores of Children in Selected Public Schools in Lafayette Parish, Louisiana.

Mary Coletta mcdonough Newkome · 1974

The major purpose of this study was to determine if there was a significant difference in readiness test scores between students who participated in a structured kindergarten program and those who participated in an unstructured program.…

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Negative / Null Result ReportOpen accessMedicine

Evaluation of the Effectiveness and Safety of a Multifaceted Computerized Antimicrobial Stewardship Intervention in Surgical Settings: A Single-center Cluster-randomized Controlled Trial.

Xin Yuan, Kai Chen, Jing Yuan et al. · 2023 · International Journal of Antimicrobial Agents

BACKGROUND Inappropriate antimicrobial use is common for patients undergoing surgery. Whether a multifaceted computerized antimicrobial stewardship program is effective and safe in reducing inappropriate antimicrobial use in surgical…

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Negative / Null Result ReportOpen accessBiology

Effects of new polymorphisms in the bovine myocyte enhancer factor 2D (MEF2D) gene on the expression rates of the longissimus dorsi muscle

E. Juszczuk-Kubiak, R. Starzyński, T. Sakowski et al. · 2012 · Molecular Biology Reports

Myocyte enhancer factor 2D (MEF2D), a product of the MEF2D gene, belongs to the myocyte enhancer factor 2 (MEF2) protein family which is involved in vertebrate skeletal muscle development and differentiation during myogenesis. The aim of…

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