11,350,156 papers found

This paper provides a summary of the main quantitative research designs. Quantitative research designs occur in a hierarchy of evidence, ranging from descriptive research designs such as cross-sectional studies, and cohort designs, to more carefully constructed experimental designs like randomised control trials (RCT's…

This study assessed the feasibility of studying animal-assisted activities (AAA) in inpatient pediatric oncology and collected preliminary data on potential benefits of AAA for this population. Patients at a large pediatric hospital were identified using electronic medical records and approached with physician approval…

ObjectiveThe objective is to develop a privacy-preserving federated learning framework and evaluate its efficacy for two specific human factors applications: classifying mental stress levels in human-robot collaboration and recognizing human activities during manual material handling.BackgroundMachine learning, as a tr…

Malignant neoplasm is one of the most incurable diseases among inflammatory diseases. Researchers have been studying for decades to win over this lethal disease and provide the light of hope to humankind. The gastrointestinal bacteria of human hold a complex ecosystem and maintain homeostasis. One hundred trillion micr…

The right to withdraw from research without penalty is well established around the world. However, it has been challenged in some corners of bioethics based on concerns about various harms-to participants, to scientific integrity, and to research bystanders-that may stem from withdrawal. These concerns have become part…

Investigations within the Human Connectome Project have expanded to include studies focusing on brain disorders. This paper describes one of the investigations focused on psychotic psychopathology: The psychosis Human Connectome Project (P-HCP). The data collected as part of this project were multimodal and derived fro…

Since nutrition can influence the process of carcinogenesis, this study's objectives are to review the relationship between nutrition and cancer from the point of view of the role of micronutrients in the treatment of cancer patients, and to get to know the deficit relationship and the excess of micronutrients, with th…

Peer-reviewed journals in the biological and life sciences literature have published articles that represent the biological view that a human's life begins at fertilization ("the fertilization view"). As those statements are typically offered without explanation or citation, the fertilization view seems to be uncontest…

The inherent complexity of generating and monitoring a test article in an inhalation chamber can make inhalation toxicity testing challenging. Poor study design, human error, and electrical and mechanical problems can adversely affect an inhalation exposure and undermine a study's results. We have developed a process f…

A well-conducted prospective cohort study has the potential to change the way in which surgeons practice. However, not all are equal. In this article, we provide many of the tools needed to critically appraise this powerful study design. We advocate for using a 3-step approach that centers on understanding the study's…

The objective of this study was to systematically review the literature regarding diagnostic applications of ultrasound imaging for evaluation of the periodontium in humans. The search was conducted on Medline, EMBASE, Web of Science, Scopus, Cochrane, and PubMed up to April 3, 2023. The studies included were exclusive…

Orthopaedic clinical research findings can be prone to β error (false negative), owing to small sample sizes. Such trials show no difference between groups when, in fact, a difference may exist. The reverse fragility index is defined as the number of "events" that would cause an individual research study's findin…

Controlled human inhalation exposure ( CHIE) studies provide a unique opportunity to conduct formal experiments to examine the human health effects of airborne pollutants. Lung function, easily measured using spirometry, is a common physiological variable often utilized in these studies. By design, CHIE studies only in…

Clinical studies are designed fundamentally to obtain data to support practice, whether diagnostic, therapeutic or prognostic. No matter how well a study was designed, implemented or analyzed, it is never possible to guarantee the truth of its results with absolute certainty. This is due to two factors that can change…

Cholangiocarcinoma (CCA) is an aggressive malignancy that originates in the bile ducts and is characterized by late-stage diagnosis and limited treatment options. CCA accounts for approximately 10% to 15% of primary liver tumors. Recent genetic studies have shed new light on this disease, exploring CCA's complexity and…

Case-control studies investigate associations between exposures to risk factors and a condition of interest. Subjects with the condition (cases) are compared to subjects known not to have the condition (controls) with respect to the presence of risk factors in the past. This design is particularly useful when the condi…

This article considers 2 types of standard by which health technology assessment (HTA) studies should be judged: methodological and social. Methodological desiderata specify characteristics of a good quality analysis and should be met regardless of context. Transparency about an HTA study's perspective (eg, specifying…

Dummy headforms used for impact testing have changed little over the years, and frictional characteristics are thought not to represent the human head accurately. The frictional interface between the helmet and head is an essential factor affecting impact response. However, few studies have evaluated the coefficient of…

Forensic odontologists often must identify human remains with damaged teeth. This damage is due to high-impact accidents, violence, or disasters. This 2-part study aimed to create two 3D digital models. They should show the destructive effects of physical and chemical agents on human teeth and popular dental materials.…

A government-sponsored study of childhood cancer in the proximity of German nuclear power plants (German acronym KiKK) found that children < 5 years living < 5 km from plant exhaust stacks had twice the risk for contracting leukemia as those residing > 5 km. The researchers concluded that since "this result was not to…