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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 7 of 16

Negative / Null Result ReportMedicine

A randomized controlled trial comparing two processes of exposure therapy: Extinction learning and habituation.

Treanor M, Zbozinek TD, Rosenberg BM et al. · 2025 · Journal of consulting and clinical psychology

Objective To investigate the role of extinction learning and habituation by comparing inhibitory retrieval to habituation-focused exposure for social anxiety and panic disorder. Method In this assessor-blinded, parallel-group, two-arm…

View details →DOI: 10.1037/ccp0000970
Negative / Null Result ReportOpen accessDiseases of the endocrine glands. Clinical endocrinology

Effects of short‐term tofogliflozin treatment on the insulin secretory capacity of people with type 2 diabetes: A randomized controlled trial, the TOP‐ELM study

Maiko Miyamoto, Aika Miya, Akinobu Nakamura et al. · 2026 · Journal of Diabetes Investigation

ABSTRACT Aims/Introduction We aimed to explore the short‐term effects of tofogliflozin on the insulin secretory capacity of people with type 2 diabetes. Materials and Methods We performed a multicenter, prospective, randomized, active‐controlled, open‐label, parallel‐group comparison study of people with type 2 diabetes aged 20–89 years, with hemoglobin A1c (HbA1c) 6.5%–9.0%, not previously treated with antihyperglycemic agents. The participants were randomly assigned to a group that received 20 mg tofogliflozin per day or a group that received 500 mg metformin per day for 4 weeks. Fasting blo

View details →DOI: 10.1111/jdi.70245
Negative / Null Result ReportMedicine

The effect of discharge education provided with two different teaching techniques on nursing students' knowledge, self-efficacy and satisfaction: A randomized controlled trial.

Kayin Y, Oztas B · 2026 · Nurse education in practice

Aim This study examined the effects of PechaKucha and Teach-Back teaching techniques on nursing students' knowledge, self-efficacy and satisfaction regarding discharge education. Background Effective discharge education requires strategies…

View details →DOI: 10.1016/j.nepr.2026.104807
Negative / Null Result ReportOpen accessSpecial aspects of education

The effect of nurse empowerment educational program on patient safety culture: a randomized controlled trial

Maryam Amiri, Zahra Khademian, Reza Nikandish · 2018 · BMC Medical Education

Abstract Background The complexity of patients’ condition and treatment processes in intensive care units (ICUs) predisposes patients to more hazardous events. Effective patient safety culture is related to lowering the rate of patients’ complications and fewer adverse events. The present study aimed to determine the effect of empowering nurses and supervisors through an educational program on patient safety culture in adult ICUs. Methods A randomized controlled trial was conducted during April–September 2015 in 6 adult ICUs at Namazi Hospital, Shiraz, Iran. A total of 60 nurses and 20 supervi

View details →DOI: 10.1186/s12909-018-1255-6
Negative / Null Result ReportOpen accessMedicine (General)

Long-term outcomes of standard versus extended lymphadenectomy in pancreatoduodenectomy for pancreatic ductal adenocarcinoma: A Chinese multi-center prospective randomized controlled trial

Weishen WANG, Wenhui LOU, Zhiwei XU et al. · 2023 · Journal of Advanced Research

Introduction: The value of extended lymphadenectomy in pancreatoduodenectomy (PD) has been discussed by five randomized controlled studies. However, the limitations in the studies made their conclusions not sufficiently reliable. Objectives: This multi-center randomized controlled study was designed to clarify the efficacy of extended lymphadenectomy in PD for pancreatic ductal adenocarcinoma (PDAC). Methods: From December 2016 to October 2018, 170 consecutive patients undergoing PD were enrolled and randomized to standard or extended lymphadenectomy for the treatment of PDAC from three high-v

View details →DOI: 10.1016/j.jare.2022.09.011
Negative / Null Result ReportOpen accessMedicine

Periodontal health of endodontically treated molars restored with composite CAD/CAM endocrowns versus stainless steel crowns in Egyptian children: a randomized controlled trial.

Mabkhot BA, Taha SEE, Kamel MH et al. · 2026 · BMC oral health

BACKGROUND: Subgingival crown margins have been linked to chronic gingival inflammation in pediatric patients. This clinical trial evaluated periodontal outcomes in first permanent molars that had undergone root canal therapy and were…

View details →DOI: 10.1186/s12903-026-08077-0
Negative / Null Result ReportMedicine

Effects of yoga on pain, sleep quality, and aerobic endurance in young women with primary dysmenorrhea: A randomized controlled trial.

Bicici Ulusahin S, Celik C, Abut CZ et al. · 2026 · Health care for women international

Primary dysmenorrhea (PD) is a prevalent condition in young women, characterized by menstrual pain, sleep disturbances, and reduced physical activity. Yoga has been suggested as a non-pharmacological intervention. We examined the effects…

View details →DOI: 10.1080/07399332.2026.2682319
Negative / Null Result ReportMedicine

Comparison of the Effects of Incubator and Radiant Environments on Physiological Criteria and Pain-Stress Levels during Heel Lance in Neonates in the Neonatal Intensive Care Unit: A Randomized Controlled Trial.

Gürsu S, Saydam BK, Kalkanlı O · 2026 · Saudi medical journal

Objectives To compare the effects of incubator and radiant heat on physiological criteria and pain-stress levels during heel prick procedures in newborns in the neonatal intensive care unit (NICU). Methods This randomized controlled…

View details →DOI: 10.15537/1658-3175.8806
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 of the orexin receptor antagonist, suvorexant, on sleep architecture in the early postoperative period following cardiac surgery: a randomized controlled trial.

Wongtangman, Reddy Janga, Azimaraghi et al. · 2026 · Critical care (London, England)

Patients recovering from cardiac surgery in the intensive care unit (ICU) do not sleep well. Commonly used sedative-hypnotic medications can disrupt sleep architecture and increase the risk of delirium in critically ill patients after…

View details →DOI: 10.1186/s13054-026-06151-1
Negative / Null Result ReportMedicine

Comparative clinical and radiographic evaluation of autogenous dentin graft versus xenograft in periodontal intrabony defects - A nonrandomized controlled trial.

Anusuya, Balaji, Manikandan · 2026 · Journal of Indian Society of Periodontology

Periodontal regeneration aims to restore the natural structure of the periodontium, therefore improving the long-term stability and function of the affected teeth. Traditional bone graft materials such as allografts, autografts,…

View details →DOI: 10.4103/jisp.jisp_210_24
Negative / Null Result ReportMedicine

The effect of harmonica-based breathing and airway clearance exercises on pulmonary function in children with cystic fibrosis: A randomized controlled trial.

Tavasoli H, Rajabi MM, Sadat Hoseini AS · 2026 · Journal of pediatric nursing

Purpose To determine the effect of harmonica-based breathing and airway clearance exercises on pulmonary function in children with cystic fibrosis (CF). Methods This randomized controlled trial included 70 children with CF aged 8-18 years.…

View details →DOI: 10.1016/j.pedn.2026.05.012
Negative / Null Result ReportOpen accessNursing

Comparison of the effect of acupressure and pilates-based exercises on sleep quality of postmenopausal women: A randomized controlled trial

Maryam Ahmadinezhad, Marzieh Kargar, Fatemeh Vizeshfar et al. · 2017 · Iranian Journal of Nursing and Midwifery Research

Background: Postmenopausal women experience a variety of symptoms, among which sleep disorder is one of the most common problems. Acupressure and Pilates exercise programs are effective nonpharmaceutical treatments which can improve sleep quality. In the present study, we aimed to compare the effects of acupressure and Pilates-based exercises on the sleep quality of postmenopausal women referred to medical clinics. Materials and Methods: In this single-blinded randomized controlled clinical trial, we recruited 108 women aged 40–60 years who were randomly assigned into one control and two inter

View details →DOI: 10.4103/1735-9066.205954
Negative / Null Result ReportMedicine

[Effects of oliceridine versus sufentanil for anesthesia induction and postoperative analgesia on postoperative nausea and vomiting in patients undergoing gynecological laparoscopic surgery: a randomized controlled trial].

Wang Y, Xu X, Shen WJ et al. · 2026 · Zhonghua yi xue za zhi

Objective: To investigate the effects of oliceridine versus sufentanil for anesthesia induction and postoperative patient-controlled intravenous analgesia (PCIA) on postoperative nausea and vomiting (PONV) in patients undergoing…

View details →DOI: 10.3760/cma.j.cn112137-20260205-00404
Negative / Null Result ReportOpen accessMedicine

Treating social cognition impairment with the online therapy 'SoCoBo': A randomized controlled trial including traumatic brain injury patients.

Tobias Lohaus, Sally Reckelkamm, Patrizia Thoma · 2024 · PLoS ONE

Objective Acquired brain injuries (ABIs), such as traumatic brain injuries (TBIs), often entail impairments of general cognition (e.g., memory, attention or executive functions) and social cognition (e.g. emotion recognition, theory of mind [ToM], social problem-solving). The availability of fully computerized interventions targeting sociocognitive deficits specifically in neurologically impaired patients is extremely limited. Therefore, the Treatment Program for Deficits in Social Cognition and Social Competencies of the Ruhr University Bochum (SoCoBo), a fully computerized online therapy des

View details →DOI: 10.1371/journal.pone.0294767
Negative / Null Result ReportOpen accessNutrition. Foods and food supply

Effect of fermented oyster (Crassostrea gigas) extracts and regular walking on muscle strength and mass in older adults with relatively low muscle mass: A randomized controlled trial

Ye Li Lee, Sang Yeoup Lee, Sang Yeoup Lee et al. · 2022 · Frontiers in Nutrition

IntroductionOysters possess an excellent nutritional profile containing γ-aminobutyric acid (GABA). Previous data suggest that GABA is a potent bioactive compound for improving muscle health. Lactic acid fermentation is thought to increase GABA content. However, the effect of oral supplementation of fermented oyster extracts (FO) on human muscle strength and mass is unclear. Therefore, we tested the effects and safety of consumption of FO combined with regular walking for 12 weeks on muscle strength and mass in older adults with relatively low muscle mass.Materials and methodsA randomized cont

View details →DOI: 10.3389/fnut.2022.935395
Negative / Null Result ReportMedicine

Impact of music intervention on endoscopic retrograde cholangiopancreatography patients' pain, anxiety, and vital signs: a randomized controlled trial.

Çakır E, Ciğerci Y, Yılmaz S · 2026 · Scientific reports

This study aimed to evaluate the effects of a music intervention on anxiety, pain, and vital signs in patients undergoing Endoscopic Retrograde Cholangiopancreatography (ERCP). This randomized controlled trial included 70 patients who…

View details →DOI: 10.1038/s41598-026-50809-3
Negative / Null Result ReportOpen accessMedicine

Evaluation of a Web-Based Medication Reconciliation Application Within a Primary Care Setting: Cluster-Randomized Controlled Trial

Michael R Gionfriddo, Yirui Hu, Bhumika Maddineni et al. · 2022 · JMIR Formative Research

BackgroundDespite routine review of medication lists during patient encounters, patients’ medication lists are often incomplete and not reflective of actual medication use. Contributing to this situation is the challenge of reconciling medication information from existing health records, along with external locations (eg, pharmacies, other provider/hospital records, and care facilities) and patient-reported use. Advances in the interoperability and digital collection of information provides a foundation for integration of these once disparate information sources. ObjectiveWe aim to evaluate th

View details →DOI: 10.2196/33488
Negative / Null Result ReportOpen accessMedicine

Comparing continuous bilateral quadratus lumborum block with continuous epidural block for analgesia and perioperative outcomes in colorectal cancer surgery: A noninferiority randomized controlled trial.

Roy S, Gupta N, Bharti SJ et al. · 2026 · Journal of anaesthesiology, clinical pharmacology

Background and aims Managing acute postsurgical pain following midline exploratory laparotomy in colorectal cancer patients involves various approaches, such as central neuraxial blockade, patient-controlled intravenous analgesia with…

View details →DOI: 10.4103/joacp.joacp_293_25
Negative / Null Result ReportMedicine

Efficacy and Safety of Ultrasound-Guided Erector Spinae Plane Block at Different Injection Depths for Percutaneous Kyphoplasty: A Randomized Controlled Trial.

Liu, Yu, Gao et al. · 2026 · Drug design, development and therapy

To compare the analgesic efficacy and safety of deep, superficial and combined deep-superficial erector spinae plane block (ESPB) combined with subanesthetic-dose esketamine in patients undergoing percutaneous kyphoplasty (PKP). A total of…

View details →DOI: 10.2147/dddt.s601168
Negative / Null Result ReportOpen accessMedicine

Neurointerventional Practice Change Following Distal Medium Vessel Occlusion Randomized Controlled Trials: A Survey.

Aziz YN, Aragon Garcia R, Plummer P et al. · 2026 · Stroke (Hoboken, N.J.)

Background Recent randomized trials showed no benefit of mechanical thrombectomy (MT) for ischemic stroke due to distal medium vessel occlusion (DMVO). We sought to understand the use of MT for DMVO stroke treatment before and after the…

View details →DOI: 10.1161/svin.125.001965
Negative / Null Result ReportMedicine

A Randomized Controlled Trial on the Timing of Soft Tissue Augmentation in Immediate Implant Placement: Soft Tissue Changes and Esthetic Outcome.

Struys T, Christiaens V, De Bruyckere T et al. · 2025 · Clinical implant dentistry and related research

Aim To assess the impact of the timing of soft tissue augmentation on soft tissue changes and esthetic outcome following single immediate implant placement (IIP) in the anterior maxilla. Materials and methods Patients with a failing tooth…

View details →DOI: 10.1111/cid.70013
Negative / Null Result ReportOpen accessMedicine

Personalized automatic management of tracheal cuff pressure and subglottic secretions drainage to prevent pneumonia in critically ill intubated patients. The MICROINHALO multicenter randomized controlled trial.

De Pascale G, Cutuli SL, Vargas M et al. · 2026 · Intensive care medicine

Purpose The MICROINHALO trial investigated whether personalized management of endotracheal tube cuff pressure (Pcuff) based on exhaled CO 2 measurement combined with automatic subglottic space drainage (SSD) may prevent tracheal…

View details →DOI: 10.1007/s00134-026-08459-6
Negative / Null Result ReportMedicine

A Comparison of Tegileridine Fumarate versus Sufentanil on the Quality of Postoperative Recovery After Laparoscopic Sleeve Gastrectomy: A Preliminary Randomized Controlled Trial.

Zheng, Chen, Sui et al. · 2026 · Drug design, development and therapy

Laparoscopic sleeve gastrectomy (LSG) is associated with substantial postoperative pain and a high rate of postoperative nausea and vomiting. Tegileridine fumarate, a biased µ-opioid receptor agonist, may offer effective analgesia…

View details →DOI: 10.2147/dddt.s611241
Negative / Null Result ReportMedicine

Effects of 100% oxygen during deferred cord clamping on oxidative stress markers: a sub-study of a randomized controlled trial.

Katheria, Lakshminrusimha, Morales et al. · 2026 · Pediatric research

We sought to evaluate oxidative changes in premature infants receiving 100% oxygen compared with 30% during deferred cord clamping (DCC). Premature infants born at 22 0/7 to 28 6/7 weeks received DCC in conjunction with either 30% (LO…

View details →DOI: 10.1038/s41390-026-05199-7