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Failure-mode index

Search what already failed

A searchable index of real negative results, null findings, and replication failures from the published literature — so you can learn what didn't work before repeating it.

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record (title, authors, DOI) compiled from open scholarly databases, with the abstract shown in full only where the paper is openly licensed (e.g. Creative Commons); otherwise a short excerpt is shown for reference under fair use. WASTE classifies each work by failure type; classifications are automated and approximate.

459 results in Negative / Null Result Report for "randomized controlled trial" · page 14 of 16

Negative / Null Result ReportMedicine

Effect of Inulin-Type Fructans on Body Composition, Carbohydrate Metabolism and Energy Expenditure in Patients with Psoriasis: Results of INGUTSKIN Randomized Controlled Trial.

Bieglecka, Kęszycka, Czerwińska et al. · 2026 · Nutrients

Patients with psoriasis, a non-contagious, chronic, systemic inflammatory skin disease, often suffer from carbohydrate metabolism disorders, which can exacerbate systemic inflammation. This randomized, double-blind, placebo-controlled…

View details →DOI: 10.3390/nu18121843
Negative / Null Result ReportMedicine

Effect and safety of Neiguan acupoint injection with astragalus injection for chronic heart failure with qi-deficiency and blood-stasis syndrome: a randomized controlled trial.

Gou, He, Zhuo · 2026 · Frontiers in medicine

To investigate the effect and safety of astragalus injection at Neiguan (PC6) for chronic heart failure (CHF; HF) with qi-deficiency and blood-stasis syndrome, and its effect on the renin-angiotensin-aldosterone system (RAAS). A…

View details →DOI: 10.3389/fmed.2026.1836620
Negative / Null Result ReportMedicine

ClassPass Memberships to Improve Well-Being Among Psychiatry Residents: A Pilot Randomized Controlled Trial.

Yang, Mueller, D'Andrea et al. · 2026 · Academic psychiatry : the journal of the American Association of Directors of Psychiatric Residency Training and the Association for Academic Psychiatry

Resident physicians experience high rates of depression, anxiety, burnout, and loneliness, yet few evidence-based interventions have been evaluated in this population. This randomized controlled pilot trial examined the feasibility,…

View details →DOI: 10.1007/s40596-026-02384-y
Negative / Null Result ReportMedicine

vNOTES Pelvic Reconstruction and Presacral-Uterosacral Ligament Compound Suspension for Treatment of Multicompartment Pelvic Organ Prolapse: A Three-Year, Three-Arm, Open-Label, Randomized Controlled Trial.

Peng, Wang, Xiao et al. · 2026 · Journal of minimally invasive gynecology

To compare the effectiveness and safety of transvaginal natural orifice transluminal endoscopic surgery (vNOTES) pelvic reconstruction (PRC), vNOTES presacral-uterosacral ligament suspension (PULS), and sacrospinous ligament fixation…

View details →DOI: 10.1016/j.jmig.2026.06.024
Negative / Null Result ReportMedicine

Material fracture/retention rates of occluso-proximal composite resin restorations with polyethylene fibers in primary molars: an interim randomized controlled trial.

Rocha, Dos Anjos, Pinho et al. · 2026 · Journal of dentistry

This 12-month, double-blind, parallel, randomized controlled trial compared the material fracture/retention rates of occluso-proximal direct composite resin restorations associated with polyethylene fiber (CR+PF; Ribbond®) with…

View details →DOI: 10.1016/j.jdent.2026.106863
Negative / Null Result ReportMedicine

Effect of a Multidimensional Digital Health Intervention on Quality of Life in Breast Cancer Survivors: A Randomized Controlled Trial.

Fuentes-Expósito, Frid, Muñoz-Mateu et al. · 2026 · JCO clinical cancer informatics

We evaluated whether offering access to a multicomponent mHealth app improves quality of life (QoL) and psychosocial outcomes among breast cancer survivors under pragmatic, nonprescriptive conditions. In this single-center, randomized,…

View details →DOI: 10.1200/cci-26-00025
Negative / Null Result ReportMedicine

7-mm-Diamater Versus 5-mm-Diameter Immediate Post-Extraction Implants in the Molar Region: 1-Year Results from a Multicenter Randomized Controlled Trial.

Esposito, Bocari, Cho et al. · 2026 · The International journal of oral & maxillofacial implants

This multicenter randomized controlled trial compared the clinical effectiveness of 7.0-mm wide-diameter implants with 5.0-mm conventional-diameter implants placed immediately after molar extraction. Thirty-nine patients needing a single…

View details →DOI: 10.11607/jomi.11536
Negative / Null Result ReportMedicine

A multicenter randomized controlled trial comparing metallic stents with 10- versus 14-mm diameter for distal biliary obstruction caused by unresectable pancreatic carcinoma.

Ishiwatari, Nakahara, Kawaguchi et al. · 2026 · Gastrointestinal endoscopy

Endoscopic retrograde cholangiopancreatography with metal stent (MS) placement is the standard treatment for biliary drainage in patients with unresectable pancreatic cancer. A 10-mm diameter MS is generally used; however, a larger stent…

View details →DOI: 10.1016/j.gie.2026.06.037
Negative / Null Result ReportMedicine

An Internet-Based Mindfulness- and Compassion-Based Intercare Program for Reducing Parental Burnout: Randomized Controlled Trial.

Villalón López, Escaffi-Schwarz · 2026 · Journal of medical Internet research

Parental burnout is an underrecognized syndrome characterized by emotional exhaustion, detachment from children, and reduced parental efficacy. It is associated with sleep disturbance, addictive behaviors, suicidal ideation, and increased…

View details →DOI: 10.2196/87416
Negative / Null Result ReportMedicine

Biologically enhanced anterior cruciate ligament reconstruction: Platelet-rich plasma or bone marrow aspirate concentrate does not lead to better clinical or radiological outcomes-A randomized controlled trial of 175 cases with 2 years of follow-up.

Mokhtar, Gawish, Abdelgawad et al. · 2026 · Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA

To compare the clinical and radiological outcomes of anterior cruciate ligament reconstruction (ACLR) augmented with platelet-rich plasma (PRP) (1) or bone marrow aspirate concentrate (BMAC) (2) against a control group undergoing standard…

View details →DOI: 10.1002/ksa.70484
Negative / Null Result ReportMedicine

Clinically indicated versus routine replacement of peripheral intravenous cannulas in elderly patients: Secondary analysis of a multi-center randomized controlled trial in mainland China.

Jiang, Wang, Wei et al. · 2026 · Geriatric nursing (New York, N.Y.)

Peripheral Intravenous Cannulas (PIVCs) are extensively used for infusion therapy. Although current evidence suggests that adult patients may have PIVCs removed based on clinical indications, the indication in elderly patients remains…

View details →DOI: 10.1016/j.gerinurse.2026.104100
Negative / Null Result ReportMedicine

Virtual Reality Glasses vs Conventional Behavior Management Techniques for Anxiety and Pain Control in 6-10-year-old Children: A Randomized Controlled Trial.

Rathee, Bhardwaj, Gupta et al. · 2026 · International journal of clinical pediatric dentistry

Anxiety and pain often lead to a challenging situation in a dental clinic. This study aimed to compare the efficacy of virtual reality (VR) glasses to conventional techniques for anxiety control in children. Jio Dive VR glasses (passive)…

View details →DOI: 10.5005/jp-journals-10005-3493
Negative / Null Result ReportMedicine

Effect of Meibomian Gland Expression on Meibomian Gland Regeneration and Function: A Randomized Controlled Trial.

Le, Chotikkakamthorn, Kasetsuwan et al. · 2026 · Clinical ophthalmology (Auckland, N.Z.)

This study aims to compare the effect of meibomian gland expression (MGX) combined with lid hygiene versus lid hygiene alone on the meibomian gland's morphology and function for obstructive meibomian gland dysfunction (oMGD). In this…

View details →DOI: 10.2147/opth.s607078
Negative / Null Result ReportMedicine

Effects, Acceptability, and Use of a Dynamically Tailored Mobile What Do You Drink Intervention to Reduce Excessive Drinking Among Adolescents and Young Adults in the Netherlands: Randomized Controlled Trial.

van Keulen, Voogt, Kleinjan et al. · 2026 · JMIR mHealth and uHealth

Excessive alcohol consumption among adolescents and young adults is a serious health problem. Dynamically tailored interventions could reduce their excessive drinking. We therefore developed "What Do You Drink" (WDYD), a 17-week…

View details →DOI: 10.2196/68468
Negative / Null Result ReportMedicine

Effect of crossword puzzle on nursing students' willingness to work with older adults and gerontological nursing competence: A waiting list randomized controlled trial.

Erdoğan, Ayaz-Alkaya · 2026 · Nurse education in practice

To evaluate the effect of crossword puzzle activities on nursing students' willingness to work with older adults and their competence in gerontological nursing. Although crossword puzzles are widely used learning tools, their effects in…

View details →DOI: 10.1016/j.nepr.2026.104844
Negative / Null Result ReportMedicine

The impact of urinary catheterization on urinary tract infection and renal function in elderly patients undergoing hip fracture surgery: A prospective randomized controlled trial.

Serttas, Uysal, Deği̇rmenci̇ et al. · 2026 · Injury

Urinary tract infection(UTI) is a common complication following hip fracture surgery in elderly patients. Urinary catheterization is frequently used to improve patient comfort during prolonged preoperative immobilization; however, its…

View details →DOI: 10.1016/j.injury.2026.113449
Negative / Null Result ReportMedicine

A randomized controlled trial comparing limbal-conjunctival autograft with conjunctival autograft in recurrent pterygium surgery with intraoperative application of 0.02% mitomycin C.

Peng, Wang, Gong et al. · 2026 · International ophthalmology

To compare the outcomes of conjunctival graft (CAG) versus limbal-conjunctival autograft (LCAG) in preventing recurrence after surgery for recurrent pterygium with intraoperative application of 0.02% mitomycin C(MMC). This prospective…

View details →DOI: 10.1007/s10792-026-04121-8
Negative / Null Result ReportMedicine

Effect of Vaginal Palpation on Voluntary Pelvic Floor Muscle Performance During Early Motor Learning in Women with Stress Urinary Incontinence (SUI): A Randomized Controlled Trial.

de Azevedo Ferreira, Fitz, Gimenez et al. · 2026 · International urogynecology journal

Seventy percent of women with pelvic floor muscle (PFM) dysfunction are unable to contract these muscles correctly. Instruction to contract properly is essential for effective PFM training (PFMT). The study aimed to compare two…

View details →DOI: 10.1007/s00192-026-06775-5
Negative / Null Result ReportOpen accessMedicine

The Effect of the combination therapy of statin and dapagliflozin, a selective inhibitor of sodium_glucose Co-transporter type 2, in the treatment of Ischemic heart disease with heart failure: A randomized controlled trial.

Abdelkader AM, Osama H, Hassan ES et al. · 2026 · European journal of clinical pharmacology

Purpose Gliflozins (SGLT2 inhibitors) and statins are key treatments commonly used in patients with ischemic heart failure. Although both are well known for diminishing cardiovascular risk and heart failure-related mortality, the possible…

View details →DOI: 10.1007/s00228-026-04050-6
Negative / Null Result ReportMedicine

The effect of podcasts delivered to female university students on HPV knowledge, awareness, and anxiety levels: A randomized controlled trial.

Çi̇men HN, Uğur S, Çıralı A et al. · 2026 · Nurse education in practice

Aim The aim of this study was to evaluate the effect of podcast-based educational content delivered to students on their knowledge, awareness and anxiety levels regarding Human Papillomavirus (HPV). Method This randomized controlled…

View details →DOI: 10.1016/j.nepr.2026.104902
Negative / Null Result ReportOpen accessMedicine

Melody vs. message: Effects of traditional song and concise social media communications on iodine knowledge, attitudes, behaviors, and biomarkers in pregnant women-A randomized controlled trial.

Ruengsiriphakakul S, Bumrerraj S, Thaenkham T · 2026 · Journal of education and health promotion

Background Iodine deficiency remains a global public health problem. Urinary iodine concentration (UIC) in pregnant women is a key indicator of iodine status in the population. Knowledge (K), attitude (A), and practice (P) levels of…

View details →DOI: 10.4103/jehp.jehp_815_25
Negative / Null Result ReportOpen accessMedicine

Effectiveness of Acupressure on Anxiety, Fatigue, and Sleep Quality Among Operating Room Personnel: A Randomized Controlled Trial.

Abjar R, NasiriFormi E, Kazemi AH et al. · 2026 · Health science reports

Background and aims High-quality sleep, calmness, and lack of fatigue are vital for the health of critical hospital staff. Operating room personnel experience significant mental and physical stress, including anxiety and sleep…

View details →DOI: 10.1002/hsr2.72680
Negative / Null Result ReportOpen accessMedicine

Efficacy of mesotherapy in patients with acute and subacute neck pain: A randomized controlled trial.

Gonultas D, Kulcu DG, Kaymaz EP et al. · 2026 · Turkish journal of physical medicine and rehabilitation

Objectives This study aims to investigate the effectiveness of mesotherapy in patients with acute or subacute neck pain compared to oral medications with the same active ingredients. Patients and methods In this randomized, single-blind…

View details →DOI: 10.5606/tftrd.2025.16956
Negative / Null Result ReportOpen accessMedicine

Dexmedetomidine for improving postpartum sleep quality following cesarean section in women: a randomized controlled trial.

Gao J, Hu CC, Wang XY et al. · 2026 · Frontiers in medicine

Background Perinatal sleep disturbance is highly prevalent among women undergoing elective cesarean section. Dexmedetomidine has been proven effective in improving sleep quality in patients undergoing general surgery, and this study aimed…

View details →DOI: 10.3389/fmed.2026.1823100
Negative / Null Result ReportMedicine

Comparison of 2% lidocaine with epinephrine and 4% articaine with epinephrine in local anesthesia of maxillary molars affected by molar incisor hypomineralization: a randomized controlled trial.

Haidar M, Raslan N · 2026 · Scientific reports

The use of local anesthesia is essential for pain control during the treatment of MIH-affected molars. This study aimed to compare injection-related pain and anesthetic efficacy between 2% lidocaine with epinephrine (LE) and 4% articaine…

View details →DOI: 10.1038/s41598-026-54698-4
Negative / Null Result ReportOpen accessMedicine

Impact of Sensory Re-education Paradigm on Quality of Life, Tactile Sensation, and Proprioceptive Acuity in Patients with Post-COVID-19 Polyneuropathy: A Randomized Controlled Trial.

Alsaid HM, Khadour YA, Zakaria HM et al. · 2026 · Journal of musculoskeletal & neuronal interactions

Objectives This study evaluated the effect of sensory re-education on quality of life and sensation in patients with post-COVID-19 polyneuropathy. Methods Forty patients with post-COVID-19 polyneuropathy were randomly assigned to a study…

Negative / Null Result ReportMedicine

The effect of stress ball use on stress, sleep quality, and comfort in individuals receiving hemodialysis: a randomized controlled trial.

Kacaroglu Vicdan A, Gibyeli Genek D · 2026 · BMC complementary medicine and therapies

Background Hemodialysis often leads to various physiological, psychological, and social challenges for individuals receiving this treatment. This study was conducted to determine the effects of stress ball use on stress, sleep quality, and…

View details →DOI: 10.1186/s12906-026-05429-9
Negative / Null Result ReportMedicine

Intermittent hemodialysis with regional citrate anticoagulation vs. priming heparin and pre-dilution HDF in patients at Risk Of Bleeding in Nephrology (the ROBIN randomized control trial).

Moranne O, Gerbal M, Chkair S et al. · 2026 · Blood purification

Introduction This single center randomized controlled trial (NCT03562754) compared pre-diluted IHDF (PIHDF) without systemic anticoagulation and the Prometheus system with regional citrate anticoagulation (IHD-RCA) in high-bleeding-risk…

View details →DOI: 10.1159/000552412
Negative / Null Result ReportOpen accessMedicine

Reporting of patient-reported outcomes (PROs) in randomized controlled trials of anemia treatments for people with CKD: a scoping review.

Patel DM, Wilson RF, Gharibani T et al. · 2026 · Journal of patient-reported outcomes

BACKGROUND: Patient-reported outcomes (PROs) are key outcomes of importance for people with chronic kidney disease (CKD), and may be of even higher relevance for patients with concomitant anemia which can often be symptomatic. Thus, PROs…

View details →DOI: 10.1186/s41687-026-01007-2