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20,230 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 ReportMedicine

The effect of two types of pyramidal and reverse pyramidal loading on spine and pelvis coordination variability during deadlift.

Sajedi Nia M, Khaleghi Tazji M, Abbasi A · 2026 · BMC musculoskeletal disorders

Purpose To investigate the effects of pyramidal and reverse pyramidal loading on spine and pelvis coordination patterns and their variability during deadlift. Methods Twelve trained male powerlifters performed deadlifts under two loading…

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Negative / Null Result ReportOpen accessMedicine

Dimensional accuracy of dental impression materials evaluated using a standardized CAD based method across materials tray types and techniques.

Wassermann C, Rosenberger N, Gerhardt M et al. · 2026 · Scientific reports

In this in vitro study, a CAD-based test workflow was established to evaluate the dimensional accuracy of conventional dental impression materials under standardized laboratory conditions. Ninety double-mix impressions were made from a…

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Negative / Null Result ReportMedicine

Comparison of mechanical complications between metal-ceramic and monolithic zirconia implant-supported prostheses: A retrospective split-mouth study.

Park JO, Park YB, Yoon JH et al. · 2026 · The Journal of prosthetic dentistry

Statement of problem Comparative studies assessing monolithic zirconia and metal-ceramic for implant-supported fixed prostheses remain limited. Purpose This retrospective study aimed to compare the survival and success of metal-ceramic and…

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Negative / Null Result ReportMedicine

Age-stratified clinical outcomes and adverse events in patients with metastatic castration-sensitive prostate cancer receiving triplet therapy with darolutamide, androgen deprivation therapy, and docetaxel.

Uchimoto T, Hirosuna K, Niigawa H et al. · 2026 · Japanese journal of clinical oncology

Background Triplet therapy with darolutamide, androgen deprivation therapy, and docetaxel (DOC) has emerged as an intensified treatment option for metastatic castration-sensitive prostate cancer (mCSPC). This study evaluated real-world…

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Negative / Null Result ReportMedicine

Effect of postural conditions on pinch strength and manual dexterity in young adults: a cross-sectional study.

Büğüşan Oruç S, Akdağ Mirzaoğlu N, Yakut Y · 2026 · International journal of occupational safety and ergonomics : JOSE

Objectives . This study aimed to investigate pinch strength and manual dexterity in different postures among young adults. Methods . A total of 200 individuals aged 18-45 years participated. Key, tip and palmar pinch strengths were…

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Negative / Null Result ReportOpen accessMedicine

A comparative evaluation of ChatGPT and Gemini for stroke caregiver support: accuracy, safety, and response characteristics.

Karaca O, Torlak MS, Tekin AN · 2026 · Revista da Associacao Medica Brasileira (1992)

Objective The use of large language models is increasing in healthcare. The aim of this study was to evaluate and compare the responses provided by ChatGPT (OpenAI) and Gemini (Google) to frequently asked questions about stroke and its…

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Negative / Null Result ReportMedicine

Comparative evaluation of root dentin thickness following hand and rotary instrumentation of primary molar root canals using cone-beam computed tomography - an invitro study.

Thomas RM, Nayak R, Madi M et al. · 2026 · BMC oral health

Remaining Root Dentin Thickness (RRDT) after root canal instrumentation is an important parameter to be assessed with newer file systems. This study aimed to evaluate the root dentin thickness following instrumentation of primary molar…

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Negative / Null Result ReportMedicine

Comparative study of prosthesis implantation, latissimus dorsi flap, and combined reconstruction immediately after breast cancer surgery: A retrospective, single-center, observational cohort study.

Zhang Y, Yu W, Shen W · 2026 · Medicine

This study aimed to explore the effects of 3 immediate reconstruction methods - prosthesis implantation, latissimus dorsi flap (LDF), or their combination - on postoperative outcomes following breast cancer (BC) surgery. A retrospective,…

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Negative / Null Result Report

Immersive Virtual Reality in Undergraduate Critical Care Nursing Education: A Pragmatic Three-Cohort Quasi-Experimental Evaluation of Perceived Simulation Effectiveness and Clinical Learning Needs

Ismaile S, Alhosban F, Shajrawi A et al. · 2026 · Preprint

Abstract Background Preparing undergraduate nurses for high-acuity practice requires educational approaches that allow safe rehearsal of complex clinical situations, yet evidence from routine programme delivery remains mixed when immersive…

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Negative / Null Result ReportMedicine

Effect of Remimazolam or Propofol Combined With Esketamine on Anesthesia and Early Perioperative Neurocognitive Disorders in Patients Undergoing Thoracoscopic Partial Lung Resection: A Randomized Clinical Trial.

Yuan W, Liang X, Zhang R et al. · 2026 · Clinical therapeutics

Purpose This study aimed to evaluate the effects of remimazolam in conjunction with esketamine on anesthesia and the incidence of early perioperative neurocognitive disorders (PNDs) in patients undergoing thoracoscopic partial lung…

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Negative / Null Result Report

Safety and short-term outcomes during the introduction of retroperitoneal single-port robot-assisted radical prostatectomy: a single-surgeon comparison with transperitoneal multiport radical prostatectomy in a Japanese population

Hattori S, Shimizu K, Kotorii R et al. · 2026 · Preprint

Abstract Purpose. To evaluate the safety and feasibility of introducing retroperitoneal single-port robot-assisted radical prostatectomy (SP-RARP) by comparing a single surgeon’s initial 50 cases with 50 recent transperitoneal multiport…

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Negative / Null Result ReportMedicine

Challenge Under Pressure Contextual Interference or Differential Learning.

Taghizadeh H, Parvizi MJ, Roostaei A et al. · 2026 · Research quarterly for exercise and sport

This study compared the effects of blocked practice, random practice (contextual interference), and differential learning on acquisition, retention, and performance under psychological pressure of a basketball jump shot in novice…

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Negative / Null Result Report

Evaluating the sensitivity of heart rate variability fractal correlation properties to training load variations: Implications for monitoring training readiness and durability

van Rassel CR, Rummel M, MacInnis MJ · 2026 · Preprint

This study examined the utility of HRV detrended fluctuation analysis alpha-1 (DFAα1) to assess readiness-to-train and exercise durability under varying acute training loads. Nineteen trained cyclists completed two 20-minute time-trials…

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Negative / Null Result ReportMedicine

Evaluation of Osteomeatal Complex Anatomical Variations, Pathologies and Nasal Cavity Volume in Patients with Cleft Lip and Palate.

Cebeci T, Polat Akmansoy B · 2026 · The Cleft palate-craniofacial journal : official publication of the American Cleft Palate-Craniofacial Association

ObjectiveTo compare osteomeatal complex (OMC) anatomical variations and nasal cavity airway volume between individuals with cleft lip and palate (CLP) and healthy controls using cone beam computed tomography (CBCT).DesignRetrospective,…

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Negative / Null Result ReportMedicine

The use of partially slatted floor designs as an alternative to littered systems in broiler chickens. II. The effects on welfare and behavioral traits.

Çavdarcı H, Sarıca M, Erensoy K et al. · 2026 · Tropical animal health and production

This study investigated the effects of different flooring designs on the welfare and behavioral traits in fast-growing broilers. A total of 600 day-old Ross-308 chickens were randomly allocated to five treatment groups: fully littered…

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