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Browse the failure-mode index

19,815 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 Report

Combination pretest probability assessment and D-dimer did not reduce outpatient imaging for venous thromboembolism in a tertiary care hospital emergency department

Sarah Ingber, Rita Selby, Jacques Lee et al. · 2014 · CJEM

ABSTRACT Introduction: Venous thromboembolism (VTE) is difficult to diagnose yet potentially life threatening. A low-risk pretest probability (PTP) assessment combined with a negative Ddimer can rule out VTE in two-thirds of outpatients,…

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Negative / Null Result Report

Ancient DNA indicates a century of overhunting did not reduce genetic diversity in Pacific Walruses (Odobenus rosmarus divergens)

Kendall K. Mills, Kyndall P. B. Hildebrandt, Kathryn M. Everson et al. · 2024 · Scientific Reports

Abstract Pacific Walruses ( Odobenus rosmarus divergens [Illiger 1815]) are gregarious marine mammals considered to be sentinels of the Arctic because of their dependence on sea ice for feeding, molting, and parturition. Like many other…

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Negative / Null Result Report

Did an urban perinatal health programme in Rotterdam, the Netherlands, reduce adverse perinatal outcomes? Register-based retrospective cohort study

Hendrik CC de Jonge, Jacqueline Lagendijk, Unnati Saha et al. · 2019 · BMJ Open

Objectives To study the effect of an urban perinatal health programme in Rotterdam, the Netherlands, on perinatal outcomes. Design A retrospective cohort study with difference-in-differences analysis using individual-level perinatal…

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Negative / Null Result Report

Did the COVID-19 Lockdown Reduce Smoking Rate in Adolescents?

Seunghyup Lee, Mingee Choi, Dahyun Kim et al. · 2022 · International Journal of Environmental Research and Public Health

This study examined the temporal trend of smoking use and the prevalent differences in the use of different types of cigarettes for Korean adolescents before and during the COVID-19 pandemic. In Korea, all use of e-cigarettes, including…

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Negative / Null Result Report

Did the ACA reduce job-lock and spur entrepreneurship?

Simon Condliffe, Matt B. Saboe, Sabrina Terrizzi · 2017 · Journal of Entrepreneurship and Public Policy

Purpose The purpose of this paper is to assess the effect of the recent Affordable Care Act’s (ACA) Dependent Mandate (DM) that requires health insurers to extend dependent coverage to the children of their insured, up to age 26. The DM…

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Negative / Null Result Report

Failing to replicate predicts citation declines in psychology

Cory J. Clark, Paul Connor, Calvin Isch · 2023 · Proceedings of the National Academy of Sciences

With a sample of 228 psychology papers that failed to replicate, we tested whether the trajectory of citation patterns changes following the publication of a failure to replicate. Across models, we found consistent evidence that failing to…

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Negative / Null Result Report

The Differential Impact of the 2000 Canadian Graphic Warning Label Policy on Smoking Prevalence by Sex and Education: A Difference-in-Difference-in-Difference Model

Bukola Usidame, Gang Meng, James F Thrasher et al. · 2022 · Nicotine & Tobacco Research

Abstract Introduction Using a quasiexperimental design, we compared the impact of the 2000 Canadian introduction of graphic warning labels (GWLs) on differences in smoking prevalence by sex and education, to the United States, where no…

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Negative / Null Result Report

Cooperatives and sustainability drivers in the Spanish wine sector. What differences do we find with investor owner firms?

Juan Ramón Ferrer, María‐Carmen García‐Cortijo, Juan‐Sebastián Castillo Valero et al. · 2023 · Annals of Public and Cooperative Economics

Abstract The fight against climate change has become a basic vector for agri‐food business strategies. In Spain, commercial wineries (Investor Owner Firms, IOFs) and cooperatives are facing major challenges in adapting to the most…

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Negative / Null Result Report

Multimodal analgesia did not improve post‐operative pain scores, reduce opioid consumption or reduce length of stay following hip arthroscopy

Ryan M. Degen, Andrew Firth, Herman Sehmbi et al. · 2023 · Knee Surgery, Sports Traumatology, Arthroscopy

Abstract Purpose To determine whether different regimens of multimodal analgesia will reduce postoperative pain scores, opioid consumption, costs and hospital length‐of‐stay following hip arthroscopy. Methods From 2018 to 2021, 132…

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Negative / Null Result Report

Medicaid Family Planning Waivers in 3 States

E. Kathleen Adams, Katya Galactionova, Genevieve M. Kenney · 2015 · INQUIRY: The Journal of Health Care Organization, Provision, and Financing

Effects of Medicaid family planning waivers on unintended births and contraceptive use postpartum were examined in Illinois, New York, and Oregon using the Pregnancy Risk Assessment Monitoring System. Estimates for women who would be…

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Negative / Null Result Report

Failed supernova remnants

Daichi Tsuna · 2021 · Publications of the Astronomical Society of Japan

Abstract In a failed supernova, partial ejection of the progenitor’s outer envelope can occur due to weakening of the core’s gravity by neutrino emission in the protoneutron star phase. We consider emission when this ejecta sweeps up the…

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Negative / Null Result Report

Significant hot hand effect in the game of cricket

Sumit Kumar Ram, Shyam Nandan, Didier Sornette · 2022 · Scientific Reports

Abstract We investigate the predictability and persistence of individual and team performance (hot-hand effect) by analyzing the complete recorded history of international cricket. We introduce an original temporal representation of…

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Negative / Null Result Report

Significant effect of compositional grading on SAGD performance in a fractured carbonate heavy oil reservoir

Hossein Ghalenavi, Saeid Norouzi-Apourvari, Mahin Schaffie et al. · 2019 · Journal of Petroleum Exploration and Production Technology

Abstract In reservoir simulation, the fluid composition is usually assumed uniform for the whole reservoir, while in many reservoirs, oil and gas composition changes with depth. This phenomenon which is known as compositional grading could…

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