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28 result(s) for "future use sampling"
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Improving clinical trial sampling for future research - an international approach: outcomes and next steps from the DIA future use sampling workshop 2011
Clinical trial samples collected for pharmacogenomic and future research are vital resources for the development of safe and effective drugs, yet collecting adequate, representative sample sets in global trials is challenging. The Drug Information Association (DIA) sponsored a workshop on future use sampling in September 2011, bringing together experts from regulatory agencies, academia and industry to discuss challenges to future use sample collection and identify actions to improve collection. Several common themes and associated action items emerged, including the need for international guidance on the collection of samples for future research; additional discussion related to coding, scope of research, and return of research results; and additional education about pharmacogenomic/future research and the importance of long-term storage of specimens.
Effectiveness of school‐based programs to reduce bullying perpetration and victimization: An updated systematic review and meta‐analysis
Executive Summary/ Background Bullying first emerged as an important topic of research in the 1980s in Norway (Olweus), and a recent meta‐analysis shows that these forms of aggression remain prevalent among young people globally (Modecki et al.). Prominent researchers in the field have defined bullying as any aggressive behavior that incorporates three key elements, namely: (1) an intention to harm, (2) repetitive in nature, and (3) a clear power imbalance between perpetrator and victim (Centers for Disease Control and Prevention; Farrington). There are many negative outcomes associated with bullying perpetration, such as: suicidal ideation (Holt et al.), weapon carrying (Valdebenito et al.), drug use (Ttofi et al.), and violence and offending in later life (Ttofi et al.). Bullying victimization too is associated with negative outcomes such as: suicidal ideation (Holt et al.), anxiety, low self‐esteem and loneliness (Hawker& Boulton). Therefore, school bullying is an important target for effective intervention, and should be considered a matter of public health concern. Objectives The objective of this review is to establish whether or not existing school‐based antibullying programs are effective in reducing school‐bullyng behaviors. This report also updates a previous meta‐analysis conducted by Farrington and Ttofi. This earlier review found that antibullying programs are effective in reducing bullying perpetration and victimization and a primary objective of the current report is to update the earlier analysis of 53 evaluations by conducting new searches for evaluations conducted and published since 2009. Search Methods Systematic searches were conducted using Boolean combinations of the following keywords: bully*; victim*; bully‐victim; school; intervention; prevention; program*; evaluation; effect*; and anti‐bullying. Searches were conducted on several online databases including, Web of Science, PscyhINFO, EMBASE, EMBASE, DARE, ERIC, Google Scholar, and Scopus. Databases of unpublished reports, such as masters' and doctoral theses (e.g., Proquest) were also searched. Selection Criteria Results from systematic searches were screened thoroughly against the following inclusion criteria. To be included in this review, a study must have: (1) described an evaluation of a school‐based antibullying program implemented with school‐age participants; (2) utilized an operational definition of school‐bullying that coincides with existing definitions; (3) measured school‐bullying perpetration and/or victimization using quantitative measures, such as, self‐, peer‐, or teacher‐report questionnaires; and (4) used an experimental or quasi‐experimental design, with one group receiving the intervention and another not receiving the intervention. Data Collection and Analysis Of the 19,877 search results, 474 were retained for further screening. The majority of these were excluded, and after multiple waves of screening, 100 evaluations were included in our meta‐analysis. A total of 103 independent effect sizes were estimated and each effect size was corrected for the impact of including clusters in evaluation designs. Included evaluations were conducted using both randomized (n = 45; i.e., randomized controlled trials/RCTs) and nonrandomized (n = 44; i.e., quasi‐experimental designs with before/after measures; BA/EC) methodologies. All of these studies included measures of bullying outcomes before and after implementation of an intervention. The remaining 14 effect sizes were estimated from evaluations that used age cohort designs. Two models of meta‐analysis are used to report results in our report. All mean effects computed are presented using both the multivariance adjustment model (MVA) and random effects model (RE). The MVA model assigns weights to primary studies in direct proportion to study level sampling error as with the fixed effects model but adjusts the meta‐analytic standard error and confidence intervals for study heterogeneity. The RE model incorporates between‐study heterogeneity into the formula for assigning weights to primary studies. The differences and strengths/limitations of both approaches are discussed in the context of the present data. Results Our meta‐analysis identified that bullying programs significantly reduce bullying perpetration (RE: odds ratio [OR] = 1.309; 95% confidence interval [CI]: 1.24–1.38; z = 9.88; p < .001) and bullying victimization (RE: OR = 1.244; 95% CI: 1.19–1.31; z = 8.92; p < .001), under a random effects model of meta‐analysis. Mean effects were similar across both models of meta‐analysis for bullying perpetration (i.e., MVA: OR = 1,324; 95% CI: 1.27–1.38; z = 13.4; p < .001) and bullying victimization (i.e., MVA: OR = 1.248; 95% CI: 1.21–1.29; z = 12.06; p < .001). Under both computational models, primary studies were more effective in reducing bullying perpetration than victimization overall. Effect sizes varied across studies, with significant heterogeneity between studies for both bullying perpetration (Q = 323.392; df = 85; p < .001; I2 = 73.716) and bullying victimization (Q = 387.255; df = 87; p < .001; I2 = 77.534) outcomes. Analyses suggest that publication bias is unlikely. Between‐study heterogeneity was expected, given the large number of studies included, and thus, the number of different programs, methods, measures and samples used. Authors' Conclusions We conclude that overall, school‐based antibullying programs are effective in reducing bullying perpetration and bullying victimization, although effect sizes are modest. The impact of evaluation methodology on effect size appears to be weak and does not adequately explain the significant heterogeneity between primary studies. Moreover, the issue of the under‐/over‐estimation of the true treatment effect by different experimental designs and use of self‐reported measures is reviewed. The potential explanations for this are discussed, along with recommendations for future primary evaluations. Avenues for future research are discussed, including the need further explain differences across programs by correlating individual effect sizes with varying program components and varying methodological elements available across these 100 evaluations. Initial findings in the variability of effect sizes across different methodological moderators provide some understanding on the issue of heterogeneity, but future analyses based on further moderator variables are needed.
Understanding the life experiences of people with multiple complex needs: peer research in a health needs assessment
Background Multiple complex needs (MCN) describe a population experiencing a combination of homelessness, substance use, offending and/or mental ill-health. Using peer researchers, this study aimed to explore the perspectives of individuals with lived experience of MCN with regards to (i) issues leading to MCN and (ii) key intervention opportunities. Methods As part of a health needs assessment in Gateshead (North East England), trained peer researchers interviewed 27 adults (aged ≥18 years) with experience of MCN, identified using purposive sampling methods. Peer researchers designed a topic guide for interviews which were audio recorded and thematically analyzed. Results Interviewees reported adverse childhood experiences leading to MCN including abuse, bereavement, parental imprisonment, family break-up and inadequate support. Mental ill-health, substance use, poverty, early experiences of unstable housing and acute homelessness were identified as major precedents for adulthood experiences of MCN. Between 16 and 20 years, access to housing, social and mental health support was perceived as having the potential to prevent circumstances worsening. Individuals perceived removing barriers to mental health, housing and welfare and financial supports could help. Conclusions This study highlights the perceived role austerity, adverse childhood events and current service provision have in current and future experiences of MCN. Individuals expressed a need for future interventions and support to be judgement free and provided by workers who are educated about MCN and related adversity. Involving peer researchers and individuals with experience of MCN in future research and service provision could ensure appropriate measures and supports are put in place.
Organizational factors, knowledge management and innovation: empirical evidence from medium- and large-scale manufacturing firms in Ethiopia
Purpose The purpose of this study is to empirically investigate the mediating role of knowledge management (KM) in the linkage between organizational factors, namely, organizational culture (OGCUL) and leadership and management support (LMS) and innovation in medium- and large-scale manufacturing firms in Ethiopia. Design/methodology/approach A sample of 200 firms has been used to gather data using simple random sampling and to test the proposed hypotheses. Structural equation modeling and cross-sectional design were used to analyze the data using LISREL 8.80 SIMPLIS program software tool. Findings Organizational factors (i.e. OGCUL and LMS) are positively associated with KM and innovation. KM constructs, namely, knowledge sharing, knowledge conversion and knowledge storage, have a significant positive influence on innovation. Knowledge sharing mediates the relationship between organizational factors and innovation. Research limitations/implications This study has three potential limitations: first, this study is based on a cross-sectional research design. Future research should include longitudinal design to get in-depth insights into the causal inferences. Second, only a few Ethiopian medium- and large-scale manufacturing firms were included in the sample. As a suggestion for future research, other researchers can include small-scale enterprises using large sample sizes and should examine the effects of organizational factors, KM and innovation across different industries. Finally, this study has only focused on investigating the mediating role of knowledge sharing between organizational factors and innovation. Future research should test the mediating role of the KM process and its constituents (knowledge acquisition, knowledge conversion, knowledge sharing and knowledge storage) between organizational factors and specific aspects of innovation to gain a full understanding of the critical role of KM in organizational innovation. Practical implications The findings of this study would serve as a guide for policy-makers and managers of manufacturing firms in developing countries in the formulation of policies and long-term strategies. It may also provide a better understanding of the causal relationship between organizational factors, KM and innovation, which in turn has value to directors and managers in manufacturing firms in developing countries as a reference for building a good OGCUL, serving as practical guidance for effective leadership and providing organizational or management support. Specifically, the findings would have the following practical implications: first, firms need to have a combination of KM processes (such as acquisition, storage, sharing and conversion). In practice, developing countries such as Ethiopia have based their innovation strategy on knowledge and technology acquisition through encouraging foreign direct investment. It is not in doubt that Ethiopia has been benefiting from the strategy as a lot of foreign companies have opened their subsidiaries in the country. However, in the authors’ view, more emphasis on knowledge acquisition strategy would not take a firm a long time to sustain its innovative activity because it is likely available to firms operating in the same industry, as well as it may hurt a firm’s competitive advantage. In addition, by its nature, knowledge may not be retained for future use; it may expire soon. Second, the current highly impulsive and rapid change in the business environment changes the way firms have to operate and deliver products or services. Knowledge (both tacit and explicit) is a resource that can provide a competitive advantage if used well for the intended purpose. In real practice, firms often face challenges in determining where to get knowledge from and how to value or manage it. Besides, knowledge can be obtained from three sources: knowledge can exist in individuals’ minds (skills, experience, ideas and insight); knowledge can dwell in a group, which we can call collective knowledge (a team of scientists or researchers); and knowledge can be embodied in an organization's systems, tools, procedures, policies, etc. Knowledge cannot be a valuable resource unless it is obtained and used in designing or producing a product or service. To integrate knowledge with business strategies, there should be a platform or framework that helps to manage it properly. Firm managers, policy-makers and other concerned bodies would consider the three sources of knowledge to foster innovative activities and obtain a competitive advantage. In addition, the authors recommend more emphasis be placed on firm-specific factors (such as OGCUL, leadership, management support and KM) to enhance the innovative capacity of a firm. Finally, the most critical issue to be raised while designing an innovation strategy would be employees’ willingness and passion to collaborate with others to develop new ideas, share ideas or implement policies. As knowledge resides in individuals’ minds, the knowledge holder should have a passion to share it with those working with him or her. In practice, knowledge sharing depends extremely on the passion and voluntariness of the two parts: knowledge provider and receiver. Therefore, firm managers would design a platform on how to motivate individuals to share their skills, experience and ideas with others through providing incentive packages, punishment and commitment. In this regard, the authors believe that the results would help individuals who are in the position to manage or regulate the manufacturing sector in designing innovation policies, KM policies or technology management policies and business strategies. Originality/value This study provides new empirical insight into the relationships between organizational factors (such as OGCUL and LMS), KM and innovation in a large sample of firms. To date, the empirical research on these relationships has been mainly limited to descriptive case studies (Chen and Huang, 2009; Zack et al., 2009; Donate and Guadaumillas, 2011), and there is thus a lack of empirical evidence with large samples of firms. Furthermore, there is a scarcity of studies investigating the relationship between organizational factors, KM and innovation in developing countries, especially in Ethiopia. This paper intends to fill this gap and nurture future research studies in the area.
Comparing Adherence to the Experience Sampling Method Among Patients With Schizophrenia Spectrum Disorder and Unaffected Individuals: Observational Study From the Multicentric DiAPAson Project
The Experience Sampling Method (ESM) is a valid method of remotely recording activities and mood, but the predictors of adherence to ESM in patients with Schizophrenia Spectrum Disorder (SSD) are not known. Studies on adherence are significant as they highlight the strengths and weaknesses of ESM-based study designs and allow the development of recommendations and practical guidelines for implementing future studies or treatment plans. The aim of this study was to compare the adherence to ESM in patients with SSD and unaffected control individuals, investigate their patterns, and report the predictors of adherence. In total, 131 patients with SSD (74 in residential facilities and 57 outpatients) and 115 unaffected control individuals were recruited at 10 different centers in Italy as part of the DiAPAson project. Demographic information, symptom severity, disability level, and level of function were recorded for the clinical sample. Participants were evaluated for daily time use and mood through a smartphone-based ESM 8 times a day for 7 consecutive days. Adherence was measured by the response rate to ESM notifications. Results were analyzed using the chi-square test, ANOVA, Kruskal-Wallis test, and Friedman test, and a logistic regression model. The overall adherence rate in this study was 50% for residents, 59% for outpatients, and 78% for unaffected control individuals. Indeed, patients with SSD had a lower rate of adherence to ESM than the unaffected control group (P≤.001), independent of time slot, day of monitoring, or day of the week. No differences in adherence rates between weekdays and weekends were found among the 3 groups. The adherence rate was the lowest in the late evening time slot (8 PM to 12 AM) and days 6-7 of the study for both patients with SSD and unaffected control individuals. The adherence rate among patients with SSD was not predicted by sociodemographic characteristics, cognitive function, or other clinical features. A higher adherence rate (ie, ≥70%) among patients with SSD was predicted by higher collaboration skills (odds ratio [OR] 2.952; P=.046) and self-esteem (OR 3.394; P=.03), and lower positive symptom severity (OR 0.835; P=.04). Adherence to ESM prompts for both patients with SSD and unaffected control individuals decreased during late evening and after 6 days of monitoring. Higher self-esteem and collaboration skills predicted higher adherence to ESM among patients with SSD, while higher positive symptom scores predicted lower adherence rates. This study provides important information to guide protocols for future studies using ESM. Future clinical or research studies should set ESM monitoring to waking hours, limit the number of days of monitoring, select patients with more collaborative skills and avoid those with marked positive symptoms, provide intensive training sessions, and improve participants' self-confidence with technologies. RR2-10.1186/s12888-020-02588-y.
The effect of antimicrobial drug use on the composition of the genitourinary microbiota in an elderly population
Background The urinary tract is inhabited by a diversity of microorganisms, known as the genitourinary microbiota. Here, we investigated the association between the use of antimicrobial drugs and the composition of the genitourinary microbiota. Results Clean-catch urinary samples were collected from 27 participants of the Rotterdam Study. Bacterial DNA was extracted and the 16S ribosomal RNA gene variable regions V3 and V4 were analyzed using Illumina sequencing. 23 of the 27 participants were included in the analysis. The population consisted of 10 men and 13 women with a mean age of 75 ± 3 years. The time between the last prescription of an antimicrobial drug and sampling was determined and categorized. The use of antimicrobial drugs prior to urine sampling was associated with statistically significant differences in the beta-diversity of the genitourinary microbiota. No association was found between antimicrobial drug use and the alpha-diversity of the genitourinary microbiota. Operational Taxonomic Units (OTUs) that were lowest in participants who used antimicrobial drug belonged to Lactobacillus and Finegoldia. In contrast, an OTU belonging to the genus Parabacteroides had higher abundances. Also, an OTU belonging to the species E . coli was higher in the participants who used antimicrobial drugs. Conclusion Prior use of antimicrobial drugs is associated with a different composition of the genitourinary microbiota. Our results might indicate a persisting effect of antimicrobial drugs on the composition of the microbiota, but reverse causality cannot be ruled out. Future studies are needed to differentiate between two possibilities. Genitourinary dysbiosis could be the result of antimicrobial drug use or genitourinary dysbiosis could be a risk factor for urinary tract infections resulting in increased use of antimicrobial drugs. This may have important implications for treatment and prevention of (recurrent) UTIs.
The Moderating Role of Academic Buoyancy and Future Time Perspective on the Relationship Between Academic Stress and Compulsive Smartphone Use Among College Students: Evidence From English Language Learning Students at Ningxia Medical University in China
The relationship between academic stress and compulsive smartphone use among college students has been extensively studied, yet empirical findings remain inconsistent and inconclusive. Moreover, potential moderating factors affecting this relationship have received limited scholarly attention. This study addresses these research gaps by examining the relationship between academic stress and compulsive smartphone use and the moderating roles of academic buoyancy and future time perspective in this relationship. Using convenience sampling, data were collected from 439 English Language Learning Students (ELLS) at Ningxia Medical University. We employed covariance-based Structural Equation Modelling (CB-SEM) to test our hypotheses. Results revealed a significant positive relationship between academic stress and compulsive smartphone use. Furthermore, academic buoyancy emerged as a significant positive moderator of this relationship, whereas future time perspective showed no significant moderating effect. These findings offer practical implications for developing targeted interventions to mitigate compulsive smartphone use among college students.
Evaluating the understanding and perception of final-year pharmacy and medical students regarding generic medicines: a cross-sectional study in Abbottabad, Pakistan
Background Generic medicines reduce the cost and improve affordability. Having precise knowledge of generic medicine consideration among senior pharmacy and medical students will enhance the impact of generic substitution. The study was conducted to evaluate the understanding and perception of generic medicines among future practitioners (FP, final year pharmacy, and medical students) in Abbottabad, Pakistan. Methods A cross-sectional survey using a closed-ended questionnaire was conducted, and the questionnaire was sent to 600 participants (FP) in the academic setting (colleges). Four hundred and fifty-three FP responded to the questionnaires, achieving a response rate of 75%. The chi-square test highlighted the factors influencing students’ knowledge, attitudes, and perceptions regarding generic substitution. Results Comparing the generic medicines to the innovator medicines, 62% (78.74) of the pharmacy students and 50.67% (165.2) of the medical students had correct knowledge. Only 48% (217.44) of the FP was aware of bioequivalence. Out of these 48% of FP, 62% (78.17) were pharmacy and 43% (140.54) were medical students. About the efficacy, 50% (227.99) of the FP had awareness (57% pharmacy and 48% medical). Overall, 53.5% of the FP had positive perception about the safety of generic products. A maximum number of the FP, 79% (357.87), had well-held beliefs regarding the cost of generics. Conclusion Our study reveals that future practitioners have a significant knowledge gap regarding generic medications. Students with different demographic characteristics, such as age, education, residence, institution, and accommodation, exhibited varying levels of knowledge, attitudes, and perceptions. The current study indicated a good knowledge, perception and beliefs of pharmacy students, and deficiencies were identified in the knowledge of medical students.
Lifting the profile of deep soil carbon in New Zealand’s managed planted forests
Background Forest soils are a globally significant carbon-store, including in deep layers (> 30 cm depth). However, there is high uncertainty regarding the response of deep soil organic carbon (DSOC) to climate change and the resulting impact on the total OC budget for forest ecosystems. Managed forests have an opportunity to reduce the risk of DSOC loss with climate change, however, the basic understanding of DSOC is lacking. Planted forests in New Zealand are managed with very limited knowledge of DSOC, both in the amount and the capacity of the soil to continue to store carbon with climate change. In this study, we explore DSOC stocks to at least 2 m depth at 15 planted forest sties in New Zealand. We also explore DSOC radiocarbon age and soil mineralogy, then contextualise our results within international SOC datasets and climate change vulnerability frameworks to identify research priorities for New Zealand’s planted forest soils. Results DSOC stocks and soil mineralogy in New Zealand’s planted forests were diverse both horizontally across soil types and vertically throughout the soil profile. Critically, limiting measurements of SOC to the top 30 cm misses more than half of the SOC stocks present to at least 2 m depth (mean 57%; range 33–72%). At depth, mineral-associated OC was the dominant fraction of DSOC (average > 90%) and was on average much older (> 1000 years) than the current planted forest land use (< 100 years). Conclusions This small case study highlights that New Zealand’s planted forests contain substantial stocks of DSOC, much of which is older than the current forest land use. The deep soils were dominated by reactive metals, and although the age of DSOC suggest long-term stability, the large contribution of reactive metal-mediated SOC stabilisation may indicate vulnerability to warming soil temperatures relative to other climate change factors. There is a pressing need to expand soil sampling to greater depths and establish a robust SOC baseline for New Zealand’s planted forests. This is essential for enabling spatial predictions of DSOC dynamics under future climate scenarios, identify the key controls on DSOC persistence, and concomitant impacts on forest ecosystem function and resilience.
Lessons learned from Evidence-Informed Decision-Making in Nutrition & Health (EVIDENT) in Africa: a project evaluation
Background Evidence-informed Decision-making in Nutrition and Health (EVIDENT) is an international partnership that seeks to identify information needs in nutrition and health in Africa and build local capacity in knowledge management to help translate the best available evidence into context-appropriate recommendations aligned to the priorities of decision-makers. This study evaluates the extent to which EVIDENT achieved its intended activities, documents the lessons learned and draws on these lessons learned to inform future activities of EVIDENT, as well as in evidence-informed decision-making (EIDM) in nutrition overall. Methods Purposive and snowball sampling were used to identify participants that were either directly or indirectly involved with EVIDENT. An analytical framework of five key elements was developed to guide data collection from EVIDENT’s documentation, in-depth interviews ( n =  20), online surveys ( n  = 26) and a participatory discussion. Interviews were transcribed verbatim and coded in NVivo 11, using deductive thematic content analysis and a phenomenological approach. Online surveys were analysed using Stata 14. Data were triangulated to address both objectives under each element of the analytical framework. Results EVIDENT succeeded in establishing a collaborative partnership, within which it delivered four short courses in EIDM. This capacity complemented case study activities in four partner African countries where EIDM processes were implemented and assessed. Identified barriers to these processes included little experience in EIDM, difficulties in engaging stakeholders, challenging local environments (e.g. donor influence, bureaucracy, inaccessibility to scientific research, poor internet connectivity), and limited time and funding. However, EVIDENT activities were driven by a local need for EIDM, a sheer interest and commitment to the cause, and the opportunity for the Global North and South to work together and build relationships. Future activities of EVIDENT, and EIDM in nutrition overall, should focus on sustained capacity-building in EIDM processes, leadership and functional skills across the Global South, investment in stakeholder engagement, context-specific EIDM, enhanced communication and linking, and strengthening relationships with existing stakeholder organisations. Conclusions In its first 3 years, EVIDENT developed and strengthened partnership, capacity and visibility on EIDM in Africa. Innovative and long-term capacity-building, dedicated leadership, further stakeholder engagement and sustainable financing, are needed for future activities of EVIDENT and EIDM in nutrition.