Negative / Null Result Report2018
The Effect of Combined Exercise Training and Feroglobin Supplementation on Serum Iron and Lipid Profile in Women with Iron Deficiency Anemia
Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum
Failure-mode index
Negative results in Medicine (General)
90 indexed negative results, null findings, and replication failures in Medicine (General). Each entry is a real published study whose primary finding was negative — learn what already failed before you repeat it.
Most-cited failures in Medicine (General)
Negative / Null Result Report2017
MULLIGAN VERSUS MAITLAND MOBILIZATION ON THORACIC KYPHOTIC ANGLE IN POSTURAL KYPHOSIS
International Journal of Physiotherapy
Negative / Null Result Report2019
Relationship between Dietary Acid Load and Glioma: A Case-Control Study
Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum
Negative / Null Result Report2024
TUDCA promotes intracellular clearance of Burkholderia pseudomallei by inhibiting endoplasmic reticulum stress-induced apoptosis in RAW264.7 cells
陆军军医大学学报
Negative / Null Result Report2025
Effect of High-Intensity Focused Ultrasound on sleep quality measures in obese doubled chin women: a randomized controlled trial
Вестник восстановительной медицины
Negative / Null Result Report2020
Do Preferred Risk Formats Lead to Better Understanding? A Multicenter Controlled Trial on Communicating Familial Breast Cancer Risks Using Different Risk Formats
Patient Preference and Adherence
Negative / Null Result Report2024
Impact of Polydeoxyribonucleotides on the Morphology, Viability, and Osteogenic Differentiation of Gingiva-Derived Stem Cell Spheroids
Medicina
Failed Experiment Report2025
Preemptive Propofol Administration in Spinal Cord Injury: Effects on Pain‐Induced Hypertension, Neuroinflammation, and Functional Recovery in Rats
Kaohsiung Journal of Medical Sciences
Negative / Null Result Report2025
Therapeutic effect of hUC-MSCs from different transplantation routes on acute liver failure in rats
Frontiers in Medicine
Negative / Null Result Report2015
SHORT TERM EFFECT OF ACUPUNCTURE-TENS ON LUNG FUNCTIONS AND DYSPNEA FOR SUBJECTS WITH MODERATE COPD
International Journal of Physiotherapy
Negative / Null Result Report2023
Twenty Years’ Experience in Retroperitoneal Lymph Node Dissection for Testicular Cancer in a Tertiary Referral Center
Medicina
Negative / Null Result Report2014
Possible benefit of consolidation therapy with high-dose cytarabine on overall survival of adults with non-promyelocytic acute myeloid leukemia
Brazilian Journal of Medical and Biological Research
Negative / Null Result Report2019
Prevention of Morbidity in Sickle Cell Disease (POMS2a)—overnight auto-adjusting continuous positive airway pressure compared with nocturnal oxygen therapy: a randomised crossover pilot study examining patient preference and safety in adults and children
Trials
Negative / Null Result Report2022
Retinal Nerve and Vascular Changes in Prediabetes
Frontiers in Medicine
Negative / Null Result Report2021
Evaluation of the Effect of Unfavorable Working Conditions on the Incidence of Spontaneous Abortion in Operating Room Staff and Nurses
Armaghane Danesh Bimonthly Journal
Negative / Null Result Report2021
Ankle and foot mechanics in individuals with chronic ankle instability during shod walking and barefoot walking: A cross-sectional study
Chinese Journal of Traumatology
Negative / Null Result Report2024
Effect of butorphanol tartrate combined with dexmedetomidine on postoperative analgesia
Vojnosanitetski Pregled
Negative / Null Result Report2022
Clinical Outcomes in Maximum Tolerated Medical Therapy in Penetrating Keratoplasty for Bullous Keratopathy
Frontiers in Medicine
Negative / Null Result Report2018
Pregabalin to improve postoperative recovery in bariatric surgery: a parallel, randomized, doubleblinded, placebo-controlled study
Journal of Pain Research
Negative / Null Result Report2019
An evaluation of the maintenance to abstinence (MTA) program in achieving abstinence in opioid users and improving mental health and quality of life
Addiction Science & Clinical Practice
Negative / Null Result Report2025
Effects of Lower Extremity and Core Muscles Fatigue Protocols on Landing Mechanics and Performance in Female Athletes
Acta Medica Iranica
Negative / Null Result Report2007
Association of Apolipoprotein E Polymorphism with Ischemic Stroke Subtypes in Taiwan
Kaohsiung Journal of Medical Sciences
Negative / Null Result Report2022
Positive Predictive Factors for Urogenital Injuries in Severely Injured Patients with Pelvic and Spinal Fractures: Introducing the UPPS Scoring System
Medicina
Negative / Null Result Report2020
Parameters of radical resection in laparoscopic and open colon and rectal cancer surgery
Vojnosanitetski Pregled
Negative / Null Result Report2021
Comparison of the Predicting Performance for Fate of Medial Meniscus Posterior Root Tear Based on Treatment Strategies: A Comparison between Logistic Regression, Gradient Boosting, and CNN Algorithms
Diagnostics
Negative / Null Result Report2020
Multiprofessional care promotes of quality of life in pregnant women with preeclampsia: a cross-sectional study
Clinics
Negative / Null Result Report2016
Failure to replicate the internal structure of Greek-specific thalassemia quality of life instrument in adult thalassemia patients in Sabah
Patient Preference and Adherence
Methods Dead-End2012
Evaluating the psychometric properties of the attitudes towards depression and its treatments scale in an Australian sample
Patient Preference and Adherence
Negative / Null Result Report2022
Epidemiology and Risk Factors of Table-Tennis-Related Injuries: Findings from a Scoping Review of the Literature
Medicina
Negative / Null Result Report2020
Alcohol Drinking and Bladder Cancer Risk From a Pooled Analysis of Ten Cohort Studies in Japan
Journal of Epidemiology
Negative / Null Result Report2021
Rheumatoid Arthritis and Cardiovascular Risk: Retrospective Matched-Cohort Analysis Based on the RECORD Study of the Italian Society for Rheumatology
Frontiers in Medicine
Abandoned Hypothesis2025
Personal preventive protocols and travel patterns during the COVID-19 pandemic
Russian Open Medical Journal
Negative / Null Result Report2023
Exploring critical factors affecting sign language knowledge and motivation for sign language learning in nurses: A cross-sectional study
Journal of Health Sciences
Negative / Null Result Report2024
Evaluation of the non-invasive indicators in predicting detrusor underactivity in individuals with small-volume prostatic hyperplasia and lower urinary tract symptoms
Journal of Men's Health
Negative / Null Result Report2020
Optimising after-hours workflow of computed tomography orders in the emergency department
BMJ Open Quality
Negative / Null Result Report2026
Understanding Anastomotic Healing in Colo-Rectal Surgery; a Multicentric 5-Year Analysis of Predictive Factors for Integrity and Fistula Formation
Diagnostics
Negative / Null Result Report2024
Anesthesia’s Influence on Postoperative In-Hospital Morbidity–Mortality in Proximal Femoral Fractures in the Elderly
Medicina
Negative / Null Result Report2021
Evaluation of the Awareness of the Yazd Medical Students about Common Oral Diseases and its Relationship with General Health of the Body
Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Shahīd Ṣadūqī Yazd
Negative / Null Result Report2018
Are There Any Systemic Effects of the Intratympanic Administration of Dexamethasone?
Bezmiâlem Science
Negative / Null Result Report2026
Evaluating ovarian blood supply anatomy and variability via digital subtraction angiography in patients with cesarean scar pregnancy undergoing uterine artery embolization
Frontiers in Medicine
Negative / Null Result Report2021
Correlation between the symptoms of upper gastrointestinal disease and endoscopy findings: Implications for clinical practice
Journal of Taibah University Medical Sciences
Negative / Null Result Report2019
Craniofacial Characteristics of Thalassemia Major Patients
Eurasian Journal of Medicine
Failed Experiment Report2020
A Resident-Authored, Case-Based Electrocardiogram Email Curriculum for Internal Medicine Residents
MedEdPORTAL
Methods Dead-End2020
A one-step NIST traceable HPLC method for quantitation of vitamin B6 and 4-pyridoxic acid in human plasma
Practical Laboratory Medicine
Negative / Null Result Report2004
Community-based transconjunctival marginal rotation for cicatricial trachoma in Indians from the Upper Rio Negro basin
Brazilian Journal of Medical and Biological Research
Negative / Null Result Report2021
Permissible Outcomes of Lobe-Specific Lymph Node Dissection for Elevated Carcinoembryonic Antigen in Non-Small Cell Lung Cancer
Medicina
Negative / Null Result Report2012
Comparing Different Ways of Position on Vascular Complications after Coronary Angiography: A Randomized Clinical Trial
Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Qum
Negative / Null Result Report2020
The Effect of a 2-Week Pre-clerkship Residency Exploration Program on Specialty Interest and Understanding of Physical Medicine and Rehabilitation
Archives of Rehabilitation Research and Clinical Translation
Negative / Null Result Report2007
Indoor NO2 air pollution and lung function of professional cooks
Brazilian Journal of Medical and Biological Research
Negative / Null Result Report2014
Genotype and allelic frequencies of CYP2E1*5B polymorphism in the southwest population of Iran
Iranian South Medical Journal