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.
19735 results in Negative / Null Result Report · page 21 of 658
Carole Clair, Nancy A. Rigotti, Bianca Porneala et al. · 2013 · JAMA
IMPORTANCE: Smoking cessation reduces the risks of cardiovascular disease (CVD), but weight gain that follows quitting smoking may weaken the CVD benefit of quitting. OBJECTIVE: To test the hypothesis that weight gain following smoking…
Maryam Alsadat Hashemipour, Mehrnaz Tahmasbi, Farnaz Fahimi Hanzaei · 2012 · Medicina oral, patología oral y cirugía bucal
OBJECTIVES: The aim of this study is to evaluate the position of impacted third molars based on the classifications of Pell & Gregory and Winter in a sample of Iranian patients. STUDY DESIGN: In this retrospective study, up to 1020…
Su Hwan Lee, Yeojun Yun, Soo Jung Kim et al. · 2018 · Journal of Clinical Medicine
There have been few large-scale studies on the relationship between smoking and gut microbiota. We investigated the relationship between smoking status and the composition of gut microbiota. This was a population-based cross-sectional study using Healthcare Screening Center cohort data. A total of 758 men were selected and divided into three groups: never (n = 288), former (n = 267), and current smokers (n = 203). Among the three groups, there was no difference in alpha diversity, however, Jaccard-based beta diversity showed significant difference (p = 0.015). Pairwise permutational multivaria
Rose E. O’Dea, Malgorzata Lagisz, Michael D. Jennions et al. · 2018 · Nature Communications
Fewer women than men pursue careers in science, technology, engineering and mathematics (STEM), despite girls outperforming boys at school in the relevant subjects. According to the 'variability hypothesis', this over-representation of males is driven by gender differences in variance; greater male variability leads to greater numbers of men who exceed the performance threshold. Here, we use recent meta-analytic advances to compare gender differences in academic grades from over 1.6 million students. In line with previous studies we find strong evidence for lower variation among girls than boy
Victor Couture, Benjamin Faber, Yizhen Gu et al. · 2021 · American Economic Review Insights
This paper estimates the impact of the first nationwide e-commerce expansion program on rural households. To do so, we combine a randomized control trial with new survey and administrative microdata. In contrast to existing case studies,…
Simon Haines, John Gleeson, Peter Kuppens et al. · 2016 · Psychological Science
The ability to regulate emotions is central to well-being, but healthy emotion regulation may not merely be about using the "right" strategies. According to the strategy-situation-fit hypothesis, emotion-regulation strategies are conducive…
Laure Gallien, Marta Carboni · 2016 · Ecography
Alien species are continually introduced in most regions of the world, but not all survive and coexist with the resident native species. Approaches analyzing the functional (or phylogenetic) similarity between invasive species and native…
Nicola Raimo, Filippo Vitolla, Arcangelo Marrone et al. · 2020 · Business Strategy and the Environment
Abstract The limits of financial disclosure in meeting the investors' needs have led to the request for reporting frameworks capable of incorporating information of different nature. Integrated reporting (IR), which is the latest novelty…
Kate Osborne, Andrew M. Dolman, Scott C. Burgess et al. · 2011 · PLoS ONE
Coral reef ecosystems worldwide are under pressure from chronic and acute stressors that threaten their continued existence. Most obvious among changes to reefs is loss of hard coral cover, but a precise multi-scale estimate of coral cover dynamics for the Great Barrier Reef (GBR) is currently lacking. Monitoring data collected annually from fixed sites at 47 reefs across 1300 km of the GBR indicate that overall regional coral cover was stable (averaging 29% and ranging from 23% to 33% cover across years) with no net decline between 1995 and 2009. Subregional trends (10-100 km) in hard coral w
Bharat Randive, Vishal Diwan, Ayesha De Costa · 2013 · PLoS ONE
BACKGROUND: India accounts for 19% of global maternal deaths, three-quarters of which come from nine states. In 2005, India launched a conditional cash transfer (CCT) programme, Janani Suraksha Yojana (JSY), to reduce maternal mortality ratio (MMR) through promotion of institutional births. JSY is the largest CCT in the world. In the nine states with relatively lower socioeconomic levels, JSY provides a cash incentive to all women on birthing in health institution. The cash incentive is intended to reduce financial barriers to accessing institutional care for delivery. Increased institutional
Rick Johnston, Reining Petacchi · 2017 · Contemporary Accounting Research
Abstract The Securities and Exchange Commission ( SEC ) reviews company filings (10‐Q, 10‐K, S‐1, etc.) submitted to them. If a review identifies potential deficiencies, the SEC staff sends the company a comment letter seeking…
Yuhei Kobayashi, Hiroyuki Okura, Teruyoshi Kume et al. · 2014 · Circulation Journal
BACKGROUND: Stent underexpansion remains a concern as a cause of drug-eluting stent (DES) failure. Although coronary calcification is considered to be a contributing factor in stent underexpansion, previous intravascular ultrasound studies…
Thomas M. Newsome, Luigi Boitani, Guillaume Chapron et al. · 2016 · Mammal Review
Abstract Grey wolves Canis lupus have been studied extensively, but there has been no detailed review of the species’ feeding ecology, despite growing debate about how to conserve wolf populations while limiting their impacts on wild or…
Haresh Kirpalani, Edward F. Bell, Susan R. Hintz et al. · 2020 · New England Journal of Medicine
BACKGROUND: Limited data suggest that higher hemoglobin thresholds for red-cell transfusions may reduce the risk of cognitive delay among extremely-low-birth-weight infants with anemia. METHODS: We performed an open, multicenter trial in…
Lyna Z. Schieber, Gery P. Guy, Puja Seth et al. · 2019 · JAMA Network Open
Importance: Risk of opioid use disorder, overdose, and death from prescription opioids increases as dosage, duration, and use of extended-release and long-acting formulations increase. States are well suited to respond to the opioid crisis through legislation, regulations, enforcement, surveillance, and other interventions. Objective: To estimate temporal trends and geographic variations in 6 key opioid prescribing measures in 50 US states and the District of Columbia. Design, Setting, and Participants: Population-based cross-sectional analysis of opioid prescriptions filled nationwide at US r
M. Ajello, A. Albert, B. Anderson et al. · 2016 · Physical Review Letters
We report on the search for spectral irregularities induced by oscillations between photons and axionlike-particles (ALPs) in the γ-ray spectrum of NGC 1275, the central galaxy of the Perseus cluster. Using 6 years of Fermi Large Area…
Mario Bassetti, Dorothee Schär, Beat Wicki et al. · 2013 · Clinical Oral Implants Research
OBJECTIVE: The objective of the study is to compare the clinical, microbiological and host-derived effects in the non-surgical treatment of initial peri-implantitis with either adjunctive local drug delivery (LDD) or adjunctive photodynamic therapy (PDT) after 12 months. MATERIALS AND METHODS: Forty subjects with initial peri-implantitis, that is, pocket probing depths (PPD) 4-6 mm with bleeding on probing (BoP) and radiographic bone loss ≤2 mm, were randomly assigned to two treatment groups. All implants were mechanically debrided with titanium curettes and with a glycine-based powder airpoli
Kim de Jong, Patricia van Sluis, Annet Nugter et al. · 2012 · Psychotherapy Research
Providing outcome monitoring feedback to therapists seems to be a promising approach to improve outcomes in clinical practice. This study aims to examine the effect of feedback and investigate whether it is moderated by therapist…
Elizabeth DiNenno, Joseph Prejean, Kathleen L. Irwin et al. · 2017 · MMWR Morbidity and Mortality Weekly Report
CDC's 2006 recommendations for human immunodeficiency virus (HIV) testing state that all persons aged 13-64 years should be screened for HIV at least once, and that persons at higher risk for HIV infection, including sexually active gay,…
Claartje L. ter Hoeven, Ward van Zoonen · 2015 · New Technology Work and Employment
Advances in communication technology continue to expand the possibilities for redesigning work environments to allow for temporal and spatial flexibility. Although flexible work designs ( FWDs ) are typically launched with high…
Sinan Özgelen · 2012 · Eurasia Journal of Mathematics Science and Technology Education
The purpose of this study was to investigate Turkish primary students’ scientific process skills under the theoretical framework of cognitive domain. The sample set consisted of 306 sixth and seventh grade students from public, private, and bussed schools. The Turkish Integrated Process Skill Test was used to measure scientific process skills, and the findings showed generally low scores. However, results indicated significant differences between sixth and seventh grade students at private and public schools. In addition, significant differences emerged among sixth grade students at each schoo
Ryan Hidayat Rafiola, Punaji Setyosarı, Carolina Ligya Radjah et al. · 2020 · International Journal of Emerging Technologies in Learning (iJET)
This study aims to analyze the effect of learning motivation, self-efficacy, and blended learning on students’ achievement in the industrial revolution 4.0. This is done to follow the development of the world of education to improve the quality of service, Human Resources and the quality of graduates. The research object was Public High School in Padang Sampling using Slovin formula. To analyze the research data used Partial Least Square (PLS) Version 3.0. The results showed that (1) Learning Motivation had a positive and significant effect on student achievement of Public High School in Padan
Sara Cools, Jon H. Fiva, Lars J. Kirkebøen · 2015 · Scandinavian Journal of Economics
Abstract Reserving a share of the parental leave period for fathers is considered necessary in order to induce fathers to take leave, and to increase men's participation in child‐rearing. We investigate how a parental leave reform directed…
Peter N. Alexandrov, Prerna Dua, James M. Hill et al. · 2012 · PubMed
Human cerebrospinal fluid (CSF), produced by the choroid plexus and secreted into the brain ventricles and subarachnoid space, plays critical roles in intra-cerebral transport and the biophysical and immune protection of the brain. CSF…
Patel Bhageerath Reddy, Ayman El‐Refaie, Kum‐Kang Huh et al. · 2012 · IEEE Transactions on Energy Conversion
Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have…
Marco Gorghetto, Edward Hardy, Giovanni Villadoro · 2018 · Journal of High Energy Physics
A bstract We study the system of axion strings that forms in the early Universe if the Peccei-Quinn symmetry is restored after inflation. Using numerical simulations, we establish the existence of an asymptotic solution to which the system is attracted independently of the initial conditions. We study in detail the properties of this solution, including the average number of strings per Hubble patch, the distribution of loops and long strings, the way that different types of radiation are emitted, and the shape of the spectrum of axions produced. We find clear evidence of logarithmic violation
Jane W. Newburger, Lynn A. Sleeper, J. William Gaynor et al. · 2018 · Circulation
Background: In the SVR trial (Single Ventricle Reconstruction), 1-year transplant-free survival was better for the Norwood procedure with right ventricle-to-pulmonary artery shunt (RVPAS) compared with a modified Blalock–Taussig shunt in…
T. D. Stanley, Hristos Doucouliagos, Piers Steel · 2018 · Journal of Economic Surveys
Abstract Despite phenomenal technological progress and exponential growth in computing power, economic growth remains comparative sluggish. In this paper, we investigate two core issues: (1) is there really no connection between ICT and…
Brian O’Sullivan, Anthony M. Griffin, Colleen Dickie et al. · 2013 · Cancer
BACKGROUND: This study sought to determine if preoperative image-guided intensity-modulated radiotherapy (IG-IMRT) can reduce morbidity, including wound complications, by minimizing dose to uninvolved tissues in adults with lower extremity…
NiCole A. Finch, Minerva M. Carrasquillo, Matthew Baker et al. · 2010 · Neurology
OBJECTIVES: To determine whether TMEM106B single nucleotide polymorphisms (SNPs) are associated with frontotemporal lobar degeneration (FTLD) in patients with and without mutations in progranulin (GRN) and to determine whether TMEM106B…