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11,325 real negative results, null findings, and replication failures in Medicine · 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 ReportOpen accessMedicine

Clinical observation of apatinib in the treatment of metastatic colorectal cancer

CHEN Zhu, LIU Yan, GAO Li-hua, CHEN Bu-you, TANG Ai-hua, LIU Jun · 2021 · Jichu yixue yu linchuang

Objective To evaluate the efficacy and safety of apatinib in the treatment of metastatic colorectal cancer (mCRC). Methods Sixty-five patients with mCRC treated with apatinib were enrolled in this study for retrospective analysis. The factors affecting the recent effective, progression-free survival (PFS) and adverse reactions were evaluated. Results The disease control rate in 63 evaluable patients was 69.9%. The median PFS for patients received first-line, second-line, and third-line and above apatinib treatment were 9.3 months, 5.8 months, and 3.3 months, respectively(P<0.001). The PFS in t

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Negative / Null Result ReportOpen accessMedicine

Effects of stress management training and problem solving on quality of life and life expectancy among infertile women

Mohammad Reza Zarbakhsh Bahri, Zahra Shoa Hasani, Ziba Zahiri Sorori et al. · 2013 · پژوهان

Introduction: This study aims to evaluate the effectiveness of stress management training and problem-solving training on quality of life and life expectancy of infertile women was conducted.Material and Methods: The method of this study was experimental with pretest – posttest design with a control group. population of 400 infertile women who referred to infertility center in Rasht were randomized to 250 of them were selected and the quality of life and life expectancy of the study were the 45 members of the quality of life and life expectancy lower were more randomly in three groups of 15 pe

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Negative / Null Result ReportOpen accessMedicine

A Comparison Between the Efficacy of Venlafaxine and Duloxetine in Improving Chemotherapy-Induced Chronic Neurotoxicity in Cancer Patients

Hanzaleh Jour Ebrahimiyan, Nafise Ansarinejad, Farshid Fardad · 2023 · Disease and Diagnosis

Background: Chemotherapy-induced peripheral neuropathy is one of the most common side effects of chemotherapy. This study aimed to determine the effectiveness of venlafaxine and duloxetine in improving chronic neurotoxicity induced by chemotherapy in cancer patients. Materials and Methods: The study was performed on cancer patients undergoing outpatient chemotherapy or hospitalization in Rasoul Akram hospital. The admitted patients were blindly divided into two groups. The first group was treated with venlafaxine, and the second group was treated with duloxetine. The treatment lasted up until

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Negative / Null Result ReportOpen accessMedicine

Digestive tolerability and acceptability of Fibersol-2 in healthy and diarrheal children 1-3 years old at a rural facility, Bangladesh: Results from a four arm exploratory study.

Abu Sadat Mohammad Sayeem Bin Shahid, Shahnawaz Ahmed, Tanzina Tazul Renesa et al. · 2022 · PLoS ONE

Background Fibersol-2 has some beneficial effects on human health. We aimed to evaluate the digestive tolerability and acceptability of Fibersol-2 in healthy and diarrheal children, as well as improvement in stool consistencies in young diarrheal children. Methods Sixty children of either sex, aged 1-3 years having four groups (healthy children/low dose, healthy children/high dose, children with diarrhea/low dose and children with diarrhea/high dose) were enrolled into this exploratory study between 1st August to 23rd October 2017. Two presumptive doses, low (2.5g) and high (5g), twice daily w

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Negative / Null Result ReportOpen accessMedicine

Repair of microdamage in osteonal cortical bone adjacent to bone screw.

Lei Wang, Tingjun Ye, Lianfu Deng et al. · 2014 · PLoS ONE

Up to date, little is known about the repair mode of microdamage in osteonal cortical bone resulting from bone screw implantation. In this study, self-tapping titanium cortical bone screws were inserted into the tibial diaphyses of 24 adult male rabbits. The animals were sacrificed at 1 day, 2 weeks, 1 month and 2 months after surgery. Histomorphometric measurement and confocal microscopy were performed on basic fuchsin stained bone sections to examine the morphological characteristics of microdamage, bone resorption activity and spatial relationship between microdamage and bone resorption. Di

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Negative / Null Result ReportOpen accessMedicine

Functional MR Microimaging of Pancreatic β-Cell Activation

Barjor Gimi, Lara Leoni, Jose Oberholzer et al. · 2006 · Cell Transplantation

The increasing incidence of diabetes and the need to further understand its cellular basis has resulted in the development of new diagnostic and therapeutic techniques. Nonetheless, the quest to noninvasively ascertain β-cell mass and function has not been achieved. Manganese (Mn)-enhanced MRI is presented here as a tool to image β-cell functionality in cell culture and isolated islets. Similar to calcium, extracellular Mn was taken up by glucose-activated β-cells resulting in 200% increase in MRI contrast enhancement, versus nonactivated cells. Similarly, glucose-activated islets showed an in

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Negative / Null Result ReportOpen accessMedicine

Corneal dendritic cells and the subbasal nerve plexus following neurotoxic treatment with oxaliplatin or paclitaxel

Jeremy Chung Bo Chiang, David Goldstein, Azadeh Tavakoli et al. · 2021 · Scientific Reports

Abstract Immune cell infiltration has been implicated in neurotoxic chemotherapy for cancer treatment. However, our understanding of immune processes is still incomplete and current methods of observing immune cells are time consuming or invasive. Corneal dendritic cells are potent antigen-presenting cells and can be imaged with in-vivo corneal confocal microscopy. Corneal dendritic cell densities and nerve parameters in patients treated with neurotoxic chemotherapy were investigated. Patients treated for cancer with oxaliplatin (n = 39) or paclitaxel (n = 48), 3 to 24 months prior to assessme

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Negative / Null Result ReportOpen accessMedicine

Exercise preserves muscle mass and force in a prostate cancer mouse model

Darpan I. Patel, Kira Abuchowski, Bilal Sheikh et al. · 2019 · European Journal of Translational Myology

The purpose of this study was to examine the effects of exercise in modulating biomarkers of sarcopenia in a treatment naïve transgenic adenocardinoma of the mouse prostate (TRAMP) model. Thirty TRAMP mice were randomized to either exercise (voluntary wheel running) or no-treatment control group for a period of 20 weeks. During necropsy, gastrocnemius muscles and prostate tumors were harvested and weighed. Gastrocnemius concentrations of myostatin, insulin-like growth factor (IGF)-1 and tumor necrosis factor (TNF)-α were quantified. Exercise mice had greater muscle mass than controls (p=0.04).

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Negative / Null Result ReportOpen accessMedicine

Cultural landscape perception of the Chinese traditional settlement: Based on tourists’ online comments

Jingjing Zhou, Shanshan Wu, Xiaojing Wu et al. · 2023 · PLoS ONE

The cultural landscape in traditional settlements is an important historical and cultural resource created by human beings in the process of historical evolution, and is an important resource for the development of traditional settlement tourism. This paper selected 21 representative traditional settlements for research using online comments from tourists as data and content analytical methods including high-frequency vocabulary, semantic networks and emotional attitudes to explore the public perspective on the connotations of cultural landscape features in traditional settlements. There are f

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Negative / Null Result ReportOpen accessMedicine

Hyponatremia at Admission in Hospitalized Patients With COVID-19: Risk Factors and Impact on Prognosis

Negar Sheikhdavoodi, Maryam Gheraati, Sima Hashemipour et al. · 2022 · The Journal of Qazvin University of Medical Sciences

Background: Electrolyte disorders, particularly hyponatremia, have been reported in a considerable number of patients with Coronavirus Disease 2019 (COVID-19). Objective: The current study aims to evaluate the risk factors, symptoms, and prognosis of hyponatremia in hospitalized patients with COVID-19. Methods: In this retrospective cohort study, 467 patients with COVID-19 were divided into 4 groups based on the sodium level at the time of admission: normal, mild hyponatremia, moderate hyponatremia, and severe hyponatremia. Symptoms, laboratory findings, and prognosis were compared among these

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Negative / Null Result ReportOpen accessMedicine

Comparing the effectiveness of group-based Cognitive-Behavioral Couple Therapy (CBCT) and Schema-Based Couple Therapy (SBCT) workshops in reducing desire for divorce and marital boredom

Azam Ardeh, Elham Goodarzi, Zahra Madadi et al. · 2025 · BMC Research Notes

Abstract Background Marital relationships, like any other interpersonal bond, encompass both positive and negative dimensions. Central to the success of marriage is the level of satisfaction and commitment experienced by the partners. This study aims to compare the efficacy of cognitive-behavioral couple therapy and schema-based couple therapy in reducing the desire for divorce and marital boredom. Methods This experimental study employed a pre-test-post-test design with a control group. The research sample comprised couples experiencing marital issues who sought counseling at various counseli

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Negative / Null Result ReportOpen accessMedicine

Prognostic follow-up of high-grade squamous intraepithelial lesions of the cervix near the conization margin: A retrospective cohort study.

Dandan Chen, Huamin Wu, Feifeng Huang et al. · 2025 · PLoS ONE

Objective This study explored the prognosis of high-grade squamous intraepithelial lesion (HSIL) patients with negative margins, investigating the impact of different distances between lesions and incisal margins in conization specimens. Methods This retrospective cohort study included 240 HSIL patients. Patients with negative incisal margins were divided into 3 groups according to the distance between the lesion and the incisal margin in the conization tissue. Group 1 consisted of a distance of 3 mm (n = 202). For patients with lesions close to the incisal margin (≤3 cm), the decision between

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Negative / Null Result ReportOpen accessMedicine

Changes in kinematic behavior and collateral ligament strain after medially stabilized TKA using a novel intraoperative navigation platform: a cadaveric study.

Van de Vyver A, Taylan O, Peersman G et al. · 2026 · Archives of orthopaedic and trauma surgery

Objectives This study aimed to analyze to what extent a novel intraoperative navigation platform (Next-AR, Medacta) for total knee arthroplasty (TKA) allows to restore the native knee joint kinematics and strains in the medial collateral…

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Negative / Null Result ReportOpen accessMedicine

Polyethylene glycol versus lactulose in the treatment of chronic functional constipation in children: A randomized clinical trial

Hassan Talakesh, Alizamen Salehifard Jouneghani, Karamali Kasiri et al. · 2024 · Journal of Shahrekord University of Medical Sciences

Background and aims: Constipation in children is a serious problem that affects both children and their families. We aimed to compare the clinical efficacy of lactulose and polyethylene glycol in the treatment of constipation in children. Methods: This randomized clinical trial was performed on 92 patients referred to a private gastroenterology clinic in Shahrekord, Iran. The patients were randomly assigned into two groups receiving polyethylene glycol or lactulose. Defecation patterns and complications were assessed 0, 3, 7, and 21 days after the intervention. Data were analyzed using the chi

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Negative / Null Result ReportOpen accessMedicine

Biological sex-related differences in whole-body coordination during standing turns in healthy young adults

Fuengfa Khobkhun, Jenjira Thanakamchokchai · 2023 · Scientific Reports

Abstract Biological sexes (male and female) have been reported to influence postural control and balance due to differences in musculoskeletal structures, hormonal factors, and neuromuscular control. These factors can contribute to the turning performance, potentially leading to an increased incidence of falls, particularly during turning. Therefore, this study aimed to explore the whole-body coordination and stepping characteristics and during standing turns in healthy adults to determine the effects of biological sex and turn speed. Fifty participants (25 males and 25 females) completed 180°

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Negative / Null Result ReportOpen accessMedicine

The role of trust in the social heuristics hypothesis.

Andres Montealegre, William Jimenez-Leal · 2019 · PLoS ONE

According to the social heuristics hypothesis, people intuitively cooperate or defect depending on which behavior is beneficial in their interactions. If cooperation is beneficial, people intuitively cooperate, but if defection is beneficial, they intuitively defect. However, deliberation promotes defection. Here, we tested two novel predictions regarding the role of trust in the social heuristics hypothesis. First, whether trust promotes intuitive cooperation. Second, whether preferring to think intuitively or deliberatively moderates the effect of trust on cooperation. In addition, we examin

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Negative / Null Result ReportOpen accessMedicine

Induction chemotherapy followed by concurrent chemoradiotherapy versus CCRT for locally advanced hypopharynx and base of tongue cancer

Sung Hee Lim, Jong-Mu Sun, Joohyun Hong et al. · 2021 · The Korean Journal of Internal Medicine

Background/Aims Clinical trials have not consistently supported the use of induction chemotherapy (IC) for locally advanced head and neck squamous cell cancer. Hypopharynx and base of tongue (BOT) cancer has shown relatively poor survival. We investigated the role of IC in improving outcome over current chemoradiotherapy (CRT) in patients with hypopharynx and BOT cancer. Methods Treatment-naïve patients with stage III/IV (M0) hypopharynx or BOT cancer were randomly assigned to receive CRT alone (CRT arm: cisplatin 100 mg/m2 on D1 3-weekly, two times plus radiotherapy 68.4 Gy/30 fractions on we

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Negative / Null Result ReportOpen accessMedicine

Diagnostic Performance of Neutrophil/Lymphocyte Ratio and Platelet/Lymphocyte Ratio in Endometrioma

Derya Sivri Aydın · 2019 · İstanbul Medical Journal

Introduction:To evaluate whether neutrophil/lymphocyte ratio (NLR) and platelet/lymphocyte ratio (PLR) have diagnostic value in endometrioma, which is a chronic inflammatory disease.Methods:A total of 187 patients who underwent surgery for adnexal mass, 97 patients diagnosed with endometrioma and 90 patients with benign cyst (corpus luteum, serous cysts or functional cysts), were included in this retrospective, comparative case series. NLR and PLR values obtained from preoperative complete blood count parameters were compared between the two groups.Results:There was no statistically significan

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Negative / Null Result ReportOpen accessMedicine

Thyroid stimulating hormone levels in cord blood are not influenced by non-thyroidal mothers' diseases

Laura Sterian Ward, Ilda Shizue Kunii, Rui Monteiro de Barros Maciel · 2000 · São Paulo Medical Journal

CONTEXT: Screening programs not only offer the opportunity to trace and treat almost all cases of congenital hypothyroidism but also mean large savings to the health system. However, carefully planned strategies are necessary to extend their benefits and reduce costs. OBJECTIVE: To determine the possible influence of maternal diseases that affect maternal-fetal placenta dynamics on primary thyroid stimulating hormone (TSH) screening for congenital hypothyroidism. DESIGN: Prospective non-randomized clinical trial with at least 3 months of follow-up. SETTING: A public university referral center

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Negative / Null Result ReportOpen accessMedicine

Women and men diagnosed with acute coronary syndrome – sex-related differences

Magdalena Dudek, Marta Kałużna-Oleksy, Jacek Migaj et al. · 2018 · Journal of Medical Science

Background. Coronary artery disease (CAD) is one of the most important causes of death in both men and women. There are many gender differences among patients with CAD, including risk factors and acute coronary syndrome (ACS) outcomes. The latest reports showed that mortality due to CAD is higher in women than in men. Cardiac biomarkers play an important role in risk stratification and choice of treatment strategy in patients with ACS, however some of cardiac biomarkers show worse sensitivity and specificity in women. Aim. The aim was to investigate the sex-related differences in patients with

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Negative / Null Result ReportOpen accessMedicine

Comparison of Transvaginal Ultrasonography and Hysteroscopy in the Diagnosis of Endometrial Polyp in Abnormal Vaginal Bleeding

Chia Hassan Ali, Rozhan Yassin Khalil · 2025 · Advanced Medical Journal

Background and objectives: Various methods and devices are currently applicable to diagnose endometrial polyps with different outcomes. This study aimed to compare the efficacy of trans-vaginal ultra-sonography in relation to the rigid hysteroscopy in the diagnosis of endometrial polyps in patients with abnormal vaginal bleeding. Methods: This cross-sectional study enrolled 70 female patients with endometrial polyps at Sulaimani Maternity Teaching Hospital, Iraq, from May 01, 2022 to May 01, 2023. A well-designed questionnaire including the patient's age, gender, residency, educational level,

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Negative / Null Result ReportOpen accessMedicine

Genome-wide association study of vitamin D concentrations and bone mineral density in the African American-Diabetes Heart Study.

Nicholette D Palmer, Lingyi Lu, Thomas C Register et al. · 2021 · PLoS ONE

Relative to European Americans, African Americans have lower 25-hydroxyvitamin D (25OHD) and vitamin D binding protein (VDBP) concentrations, higher 1,25-dihydroxyvitamin D (1,25(OH)2D3) concentrations and bone mineral density (BMD), and paradoxically reduced burdens of calcified atherosclerotic plaque (subclinical atherosclerosis). To identify genetic factors contributing to vitamin D and BMD measures, association analysis of >14M variants was conducted in a maximum of 697 African American-Diabetes Heart Study participants with type 2 diabetes (T2D). The most significant association signals w

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Negative / Null Result ReportOpen accessMedicine

Circulating inflammatory biomarkers and risk of intracranial aneurysm: a Mendelian randomization study

Jianxun Fang, Yuze Cao, Jun Ni · 2024 · European Journal of Medical Research

Abstract Background Intracranial aneurysm (IA) accounts for a substantial source of non-traumatic subarachnoid hemorrhage, with inflammation postulated as a potential factor in its pathogenesis. The present study aims at evaluating the association between circulating inflammatory cytokines and risk of IA under a bidirectional two-sample Mendelian randomization (MR) design. Methods For primary analysis, summary statistics of inflammatory regulators was obtained from a genome-wide association study (GWAS) comprising 8293 Finnish participants. Summary data of IA were extracted from a GWAS which c

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Negative / Null Result ReportOpen accessMedicine

The (non-)replicability of regulatory resource depletion: A field report employing non-invasive brain stimulation.

Franziska Emmerling, Carolien Martijn, Hugo J E M Alberts et al. · 2017 · PLoS ONE

Cognitive effort and self-control are exhausting. Although evidence is ambiguous, behavioural studies have repeatedly suggested that control-demanding tasks seem to deplete a limited cache of self-regulatory resources leading to performance degradations and fatigue. While resource depletion has indirectly been associated with a decline in right prefrontal cortex capacity, its precise neural underpinnings have not yet been revealed. This study consisted of two independent experiments, which set out to investigate the causal role of the right dorsolateral prefrontal cortex (DLPFC) in a classic d

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Negative / Null Result ReportOpen accessMedicine

Does incidental pride increase competency evaluation of others who appear careless? Discrete positive emotions and impression formation.

Toshiki Saito, Kosuke Motoki, Rui Nouchi et al. · 2019 · PLoS ONE

Emotion plays important and diverse roles across various social relations. Although the social functions of emotion have attracted increased attention, the effects of positive emotions such as pride on impression formation remain poorly understood. Drawing on social projection theory, this study examined how incidental experiences of pride influenced the impressions of those who made a blunder, along with two other characteristics: the person's warmth and competence. Participants were designated randomly to receive inductions of pride, awe, or a neutral emotion. Subsequently, they were asked t

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Negative / Null Result ReportOpen accessMedicine

Does willpower mindset really moderate the ego-depletion effect? A preregistered replication of Job, Dweck, and Walton (2010).

Nicholas P Carruth, Jairo A Ramos, Akira Miyake · 2023 · PLoS ONE

This article reports a preregistered study in which we attempted to replicate the results of an influential study on the ego-depletion effect reported by Job, Dweck, and Walton in 2010. The original Job et al. study (Study 1, N = 60) provided evidence that the ego-depletion effect-a performance decrease on a self-control task after performing another self-control task-occurs only for individuals who hold a belief that their willpower is limited. This moderation of the ego-depletion effect by one's willpower mindset (limited vs. nonlimited) has been interpreted as evidence against a prevalent l

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Negative / Null Result ReportOpen accessMedicine

Culture of skeletal myoblasts from human donors aged over 40 years: dynamics of cell growth and expression of differentiation markers

Cherubino Paolo, Sala Andrea, Casalone Rosario et al. · 2005 · Journal of Translational Medicine

Abstract Background Local myogenesis, neoangiogenesis and homing of progenitor cells from the bone marrow appear to contribute to repair of the infarcted myocardium. Implantation into heart tissues of autologous skeletal myoblasts has been associated with improved contractile function in animal models and in humans with acute myocardial ischemia. Since heart infarction is most prevalent in individuals of over 40 years of age, we tested whether culture methods available in our laboratory were adequate to obtain sufficient numbers of differentiated skeletal myoblasts from muscle biopsy specimens

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Negative / Null Result ReportOpen accessMedicine

NOS2 polymorphisms in prediction of benefit from first-line chemotherapy in metastatic colorectal cancer patients.

Marta Schirripa, Wu Zhang, Dongyun Yang et al. · 2018 · PLoS ONE

BACKGROUND:Macrophages play a crucial role in the interaction between tumor and immune system, and iNOS is known as a surrogate marker of M1 macrophages activation. The goal of the study was to investigate the role of iNOS polymorphisms as prognostic marker in mCRC patients. MATERIALS AND METHODS:Functional significant polymorphisms in the promoter of INOS gene were analyzed by PCR-based and direct DNA sequencing in 4 cohorts of patients receiving bevacizumab based first-line chemotherapy: two evaluation cohorts (TRIBE ARM A and ARM B) and two validation cohorts (FIRE 3 arm A and MOMA). The re

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Negative / Null Result ReportOpen accessMedicine

Does willpower mindset really moderate the ego-depletion effect? A preregistered replication of Job, Dweck, and Walton (2010)

Nicholas P. Carruth, Jairo A. Ramos, Akira Miyake · 2023 · PLoS ONE

This article reports a preregistered study in which we attempted to replicate the results of an influential study on the ego-depletion effect reported by Job, Dweck, and Walton in 2010. The original Job et al. study (Study 1, N = 60) provided evidence that the ego-depletion effect—a performance decrease on a self-control task after performing another self-control task—occurs only for individuals who hold a belief that their willpower is limited. This moderation of the ego-depletion effect by one’s willpower mindset (limited vs. nonlimited) has been interpreted as evidence against a prevalent l

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