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Wyszukujesz frazę "meta-analysis." wg kryterium: Temat

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Wyświetlanie 1-15 z 42
Tytuł:
Possibility of using meta-analysis in econometrics
Autorzy:
Gondek, Anna
Powiązania:
https://bibliotekanauki.pl/articles/425167.pdf
Data publikacji:
2013
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
meta-analysis
methodology
econometrics
Opis:
The purpose of the article was to point out the possibilities of applying metaanalysis in economic science and particularly in econometrics. So far, in Poland meta-analyses were applied in behavioral sciences, medicine and some in economic studies and management, whereas this method has been used used elsewhere since the 1970s for solving a wide spectrum of problems in many fields of study. The present article shows meta-analysis as the method using statistical tools the most, from amongst all the methods of the literature review, and it shows the procedure of carrying it out step by step and its advantages and disadvantages.
Źródło:
Econometrics. Ekonometria. Advances in Applied Data Analytics; 2013, 3(41); 15-23
1507-3866
Pojawia się w:
Econometrics. Ekonometria. Advances in Applied Data Analytics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency of Software Testing Techniques: A Controlled Experiment Replication and Network Meta-analysis
Autorzy:
Gómez, O. S.
Cortés-Verdín, K.
Pardo, C. J.
Powiązania:
https://bibliotekanauki.pl/articles/384107.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
software verification
software testing
controlled experiment
experiment replication
meta-analysis
network meta-analysis
quantitative synthesis
Opis:
Background. Common approaches to software verification include static testing techniques, such as code reading, and dynamic testing techniques, such as black-box and white-box testing. Objective. With the aim of gaining a better understanding of software testing techniques, a controlled experiment replication and the synthesis of previous experiments which examine the efficiency of code reading, black-box and white-box testing techniques were conducted. Method. The replication reported here is composed of four experiments in which instrumented programs were used. Participants randomly applied one of the techniques to one of the instrumented programs. The outcomes were synthesized with seven experiments using the method of network meta-analysis (NMA). Results. No significant differences in the efficiency of the techniques were observed. However, it was discovered the instrumented programs had a significant effect on the efficiency. The NMA results suggest that the black-box and white-box techniques behave alike; and the efficiency of code reading seems to be sensitive to other factors. Conclusion. Taking into account these findings, the Authors suggest that prior to carrying out software verification activities, software engineers should have a clear understanding of the software product to be verified; they can apply either black-box or white-box testing techniques as they yield similar defect detection rates.
Źródło:
e-Informatica Software Engineering Journal; 2017, 11, 1; 77-102
1897-7979
Pojawia się w:
e-Informatica Software Engineering Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Human AGT-p.Met268Thr and coronary heart disease risk: a case-control study and meta-analysis
Autorzy:
Hanieh, Mohammadi
Narges, Razavi
Abbasi, Ali
Babaei, Faezeh
Seyedrezazadeh, Ensiyeh
Hosseinzade, Abasalt
Powiązania:
https://bibliotekanauki.pl/articles/551649.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Przyjaciół Medycyny Rodzinnej i Lekarzy Rodzinnych
Tematy:
coronary disease
angiotensinogen
genetic polymorphism
meta-analysis.
Źródło:
Family Medicine & Primary Care Review; 2018, 1; 17-24
1734-3402
Pojawia się w:
Family Medicine & Primary Care Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On research in psychology: Publication, evaluation, prevention of pathologies of science
Autorzy:
Di Nuovo, Santo F.
Powiązania:
https://bibliotekanauki.pl/articles/2128055.pdf
Data publikacji:
2019-04-05
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
scientific research
publication
evaluation
falsification
meta-analysis
Opis:
Is it possible to find any specificity of research carried out by psychologists in their own country, justifying publication also in their native language? The question posed by Brzeziński (2014) requires considering different types of psychological research: studies regarding universal issues have to be diffused in a shared scientific format and in an international language, while studies regarding specific applicative aspects, linked to particular contexts, can be published in a language easily accessible to the psychologists living in a specific country. This kind of research and publication, if conducted with correct methodology, should not be considered of secondary scientific value. As regards the question of what indices should be used to determine a psychologist’s position in world science, I will discuss the assumption of “objectivity” in this kind of evaluation: objectivity is very difficult to obtain using numeric criteria, while pre-determined scientific and teaching criteria and thresholds could be more suitable to achieve a full evaluation for habilitation or for other scientific or academic purposes. As regards reactions to scientific pathologies such as fabrication, falsification, or plagiarism of data, meta-analysis based on cumulative research on research could permit to detect unexpected outliers and to discover “file drawer effects,” allowing replications and enhancing respect for scientific rules and ethics.
Źródło:
Roczniki Psychologiczne; 2014, 17, 3; 609-613
1507-7888
Pojawia się w:
Roczniki Psychologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
What does facial symmetry reveal about health and personality?
Autorzy:
Švegar, Domagoj
Powiązania:
https://bibliotekanauki.pl/articles/430782.pdf
Data publikacji:
2016-09-01
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
facial symmetry
health
personality
attractiveness
meta-analysis
Opis:
Over the last two decades, facial symmetry has been intensively researched. The present article aims to summarize empirical research concerning relations between facial symmetry and health and facial symmetry and personality. A systematic review of the literature shows that facial symmetry is one of the most influential visual markers of attractiveness and health, important for mate selection, while asymmetry can be considered a consequence of an individual’s inability to resist environmental and genetic stressors during development of the organism. However, in spite of evidence suggesting that preferences for facial symmetry are deeply rooted in our evolutionary history, a strong connection between facial symmetry and health is demonstrated only in studies measuring perceived health, while there is only scarce evidence corroborating the link between symmetry and actual health. The interconnections between facial symmetry and personality have not yet been extensively researched. Less than a dozen studies have addressed that issue and they have reached different conclusions. Some evidence suggests that facial symmetry signals personality attributes that indicate good psychological health, while other findings imply that pro-social personality traits negatively correlate with facial symmetry.
Źródło:
Polish Psychological Bulletin; 2016, 47, 3; 356-365
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Airborne Bacteria from Wastewater Treatment and Their Antibiotic Resistance: A Meta-Analysis
Autorzy:
Banchón, Carlos
Vivas, Teresa
Aveiga, Ana
Díaz, Linda
Powiązania:
https://bibliotekanauki.pl/articles/2027860.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bioaerosol
resistome
SARS-CoV-2
meta-analysis
Opis:
The treatment of domestic and industrial wastewater is a source for a large number of airborne microorganisms, which can be released at the environment during mechanical aeration. A meta-analysis of up to 14 industrial and municipal treatment plants was performed to determine the bacterial count in bioaerosols, as well as antibiotic resistance, at different stages of the wastewater treatment (pretreatment, primary, secondary and tertiary treatment), in comparison with bacterial counts of the ambient air surrounding the treatment plants. The highest contamination of the air with microorganisms was observed in the raw sewage inlet and at the biological reactor. In most analyzes, the air in the wastewater treatment plant was characterized by a higher content of microorganisms than at the control point. Bioaerosols from water treatment might be an important source of antibiotic resistance genes, which can be transported considerable distances and can represent a potential risk to humans. Therefore, employees should recognize the health risks associated with the absence of personal protective equipment, such as masks or respirators.
Źródło:
Journal of Ecological Engineering; 2021, 22, 10; 205-214
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cadmium and hypertension in exposed workers: A meta-analysis
Autorzy:
Caciari, Tiziana
Sancini, Angela
Fioravanti, Mario
Casale, Teodorico
Montuori, Lucio
Fiaschetti, Maria
Schifano, Maria P.
Andreozzi, Giorgia
Nardone, Nadia
Tomei, Gianfranco
Ciarrocca, Manuela
Rosati, Maria V.
Tomei, Francesco
Powiązania:
https://bibliotekanauki.pl/articles/2179139.pdf
Data publikacji:
2013-06-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
cadmium
hypertension
cardiovascular disease
workers
meta-analysis
Opis:
Objectives: In the general population, cadmium seems to be responsible for hypertension, atherosclerosis and an increase in acute coronary events. Therefore, the purpose of this meta-analysis was to analyze controlled studies conducted on cadmium and arterial pressure in occupationally-exposed workers. Materials and Methods: After analyzing all the relevant articles found in the literature, 6 publications were selected. Results: A higher prevalence of hypertension and higher values of systolic and diastolic blood pressure were recorded in the exposed subjects. Conclusions: Cadmium in occupationallyexposed individuals appears to induce an increase in systolic and diastolic blood pressure and an increase in the prevalence of hypertension.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2013, 26, 3; 440-456
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unreported standard errors in meta-analysis
Autorzy:
Longford, Nicholas T.
Powiązania:
https://bibliotekanauki.pl/articles/1917016.pdf
Data publikacji:
2021-12-08
Wydawca:
Główny Urząd Statystyczny
Tematy:
empirical Bayes
imputation
meta-analysis
missing value
sensitivity analysis
Opis:
A study that would otherwise be eligible is commonly excluded from a meta-analysis when the standard error of its treatment-effect estimator, or the estimate of the variance of the outcomes, is not reported and cannot be recovered from the available information. This is wasteful when the estimate of the treatment effect is reported. We assess the loss of information caused by this practice and explore methods of imputation for the missing variance. The methods are illustrated on two sets of examples, one constructed specifically for illustration and another based on a published systematic review.
Źródło:
Statistics in Transition new series; 2021, 22, 4; 1-17
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A systematic review and meta-analysis of laparoscopic versus robotic rectal surgery with primary anastomosis
Autorzy:
Rubinkiewicz, Mateusz
Witowski, Jan
Zbroja, Karolina
Rozmus, Kamil
Krzywoń, Julia
Truszkiewicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1391854.pdf
Data publikacji:
2020
Wydawca:
Index Copernicus International
Tematy:
laparoscopic
meta-analysis
rectal cancer
robotic
systematic review
Opis:
Purpose: Rectal cancer is one of the most common malignancies of the gastrointestinal tract. The gold standard method is surgical resection. The approach to rectal cancer is still controversial. Nowadays, robotic approach gains popularity in comparison to traditional laparoscopy. However, there is lack of studies assessing rectal resections with primary anastomosis. Methods: We performed a systematic review and meta-analysis according to the PRISMA guidelines. The primary outcomes of interest were morbidity and short-term complications. Results: An initial reference search yielded 1250 articles. Finally, we chose six studies covering 1580 patients that we included in the quantitative analysis. In our study, we demonstrated that laparoscopic and robotic surgery are non-inferior to one another in terms of morbidity (RR=1.1 95% CI: 0.89-1.39), major complication rate (RR=1.01, 95% CI: 0.60-1.69) or in length of hospitalization (MD=0,15 95% CI: -0.60−0.90). The latter has slight advantage in quality of mesorectal excision (RD = -0.19, 95% CI: -0.35 − -0.03. I2=69%) and anastomotic leakage rate (OR=2.25, 95% CI: 1.23-4.09, I2=0%). Conclusion: In certain cases Robotic Surgery provide better quality of resected specimen and lower leakage ratio, nevertheless due to heterogeneity the results are uncertain. There is substantial need for large randomized controlled studies.
Źródło:
Polish Journal of Surgery; 2020, 92, 1; 5-11
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Joint estimation for normal orthogonal mixed models
Autorzy:
de Jesus, Vera
Ferreira, Sandra
Mexia, João
Powiązania:
https://bibliotekanauki.pl/articles/730008.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
normal orthogonal mixed models
commutative Jordan algebras
meta-analysis
Opis:
Commutative Jordan algebras are used to express the structure of mixed orthogonal models and to derive complete sufficient statistics. From these statistics, UMVUE, (Uniformly Minimum Variance Unbiased Estimators), are derived for the relevant parameters, first of single models then of several such models. These models may correspond to experiments designed separately so our results may be seen as a contribution to this meta-analysis.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2007, 27, 1-2; 5-13
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Echinoids as substrates for encrustation : review and quantitative analysis
Autorzy:
Borszcz, T.
Powiązania:
https://bibliotekanauki.pl/articles/191302.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Echinoids
encrustation
Recent
fossil record
patterns
meta-analysis
review
Opis:
The existing literature, including records of both fossil and extant echinoid encrustation, is quantitatively analysed and reviewed. This shows that echinoid encrustation (number of encrusted echinoid taphocoenoses) has increased nearly continuously and dramatically to the present day, as confirmed by linear regression values of more than 85 per cent. It also demonstrates that current levels of echinoid fouling stabilised by the Miocene, while there has been a more or less continuous record of echinoid encrustation since the Late Cretaceous. Several increases have been identified since echinoid encrustation first noted occurrence from the Late Carboniferous. This trend is explained as the probable result of corresponding increases in productivity (richness, biomass, energetics, ecospace utilisation) and resources in the marine environment, including epibionts and their hosts. This conclusion matches other indicators, including the number and thickness of shell beds, bioerosion and predation intensity or biodiversity. The trajectory might have been altered to some degree by biases (e.g. selective recording, sampling effort, outcrop area, rock volume) in the same way as palaeobiodiversity estimates. Two recognised long-term gaps in echinoid encrustation (Upper Ordovician–Lower Carboniferous and Permian–Lower Cretaceous) are explained in part as bias and as biological and taphonomic signals. These gaps are caused mostly by the rapid disarticulation of Palaeozoic-type echinoids, the methodology applied here, and a lack of interest in the encrustation of Jurassic echinoids. Conversely, three short-term gaps in the Cenozoic are interpreted exclusively as bias. If correct, the present study demonstrates quantitatively the step-wise increase of productivity through time. It also suggests potential focus on further study, including the collection of new data from the field and pre-existing collections, as best for other encrustation proxies (e.g., percent of coverage by epibionts, ratio of encrusted to nonencrusted shells, taxa richness or numerical abundance of sclerobionts) in cases of large-scale analyses.
Źródło:
Annales Societatis Geologorum Poloniae; 2012, 82, 2; 139--149
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
VOCABULARY GLOSSING: A META-ANALYSIS OF THE RELATIVE EFFECTIVENESS OF DIFFERENT GLOSS TYPES ON L2 VOCABULARY ACQUISITION
Autorzy:
Vahedi, Vahideh Sadat
Ghonsooly, Behzad
Pishghadam, Reza
Powiązania:
https://bibliotekanauki.pl/articles/955891.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej w Lublinie. IATEFL Poland Computer Special Interest Group
Tematy:
hypertext gloss
vocabulary acquisition
meta-analysis
effect size
heterogeneity
Opis:
In recent years there has been a growing interest to incorporate hypertext glosses into L2 reading materials and accordingly, it has provoked researchers to uncover to what extent and under which moderator variables a specific type of gloss yields more effective outcomes than other types of glossing. The present meta-analysis attempts to examine the magnitude of the effect of different gloss types (single vs. multiple glosses) on L2 vocabulary acquisition along with identification of the contextual factors that influence between-study variation through synthetizing 34 primary articles which satisfy the inclusion criteria. The overall effect size is found to be + 0.83 (p<0.05), indicating that multiple glosses (text+visual) has a large, positive effect on learners’ vocabulary acquisition than single mode of glossing (text-only). Moderator analyses further suggest that intensity of the program and L2 proficiency level are potential moderators influencing the heterogeneity between effect sizes, whereas the learning context, sample size and research design do not have such impact.
Źródło:
Teaching English with Technology; 2016, 16, 1; 3-25
1642-1027
Pojawia się w:
Teaching English with Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Institutional investors and real earnings management: A meta-analysis
Autorzy:
Kabaciński, Bartosz
Mizerka, Jacek
Stróżyńska-Szajek, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/2058072.pdf
Data publikacji:
2022-07-11
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
real earnings management
institutional ownership
meta-analysis
corporate finance
Opis:
The aim of the article is to examine the inuflence of institutional investor ownership on real earnings' management (REM) practices through a meta-regression analysis (MRA) based on a sample of 225 estimations from 19 articles. Some of the available research suggests a mitigating role for institutional investors who can serve as external monitors and thus reduce earnings' management activities which could have a negative impact on the company's value. eTh results obtained from the basic model conrfimed neither the hypothesis about the inuflence of institutional ownership on REM, nor the hypothesis about the existence of a signicfiant publication bias. Using an augmented MRA model conclusions in diefrent areas associated with structural and methodological heterogeneity were drawn. Diefrences in the impact of institu tional ownership on real earnings' management in diefrent regions of the world, a de pendence of the results on diefrent data characteristics and diefrences in the results depending on whether the article was published in a top journal or not were found.
Źródło:
Economics and Business Review; 2022, 8, 2; 50-79
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prophylactic intra-abdominal drainage following kidney transplantation: a systematic review and meta-analysis
Autorzy:
Zawistowski, Michał
Nowaczyk, Joanna
Domagała, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1391567.pdf
Data publikacji:
2021
Wydawca:
Index Copernicus International
Tematy:
drainage
kidney transplantation
lymphocele
surgical wound infection
meta-analysis
Opis:
Introduction: An ongoing debate concerns the need for routine placement of prophylactic intra-abdominal drains following kidney transplantation. Aim: We conducted a systematic review and meta-analysis to determine whether such an approach brings any advantages in the prevention of perirenal transplant fluid collection, surgical site infection, lymphocele, hematoma, urinoma, wound dehiscence, graft loss, and need for reoperation. Methods: We conducted a random-effects meta-analysis of non-randomized studies of intervention comparing drained and drain-free adult renal graft recipients regarding perirenal transplant fluid collection and other wound complications. ROBINS-I tool and funnel plot asymmetry analysis were used to assess the risk of bias. Results: Five studies at moderate to critical risk of bias were included. A total of 2094 renal graft recipients were evaluated. Our analysis revealed no significant differences between drained and drain-free patients regarding perirenal transplant fluid collection (pooled odds ratio [OR], 0.77; 95% confidence interval [CI], 0.28–2.17; I 2 = 72%), surgical site infection (OR, 1.64; 95% CI, 0.11–24.88; I 2 = 80%), lymphocele (OR, 0.61; 95% CI, 0.02–15.27; I 2 = 0%), hematoma (OR, 0.71; 95% CI, 0.12–3.99; I 2 = 71%), and wound dehiscence (OR, 0.75; 95% CI, 0.21–2.70; I 2 = 0%). There was insufficient data concerning urinoma, graft loss, and need for reoperation. Conclusions: The available evidence is weak. Our findings show that the use of intra-abdominal drains after kidney transplantation seems to have neither beneficial nor harmful effects on perirenal transplant fluid collection and other wound complications. The present study does not support the routine placement of surgical drains after kidney transplantation. In this systematic review and meta-analysis we summarize the most up-to-date evidence for and against the routine use of intra-abdominal drain following renal transplantation.
Źródło:
Polish Journal of Surgery; 2021, 93, 4; 1-10
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does lean practices implementation impact on company performance? A meta-analytical research
Autorzy:
Gonçalves, Telma I. G.
Sousa, Paulo S. A.
Moreira, Maria R. A.
Powiązania:
https://bibliotekanauki.pl/articles/407127.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
lean manufacturing
performance evaluation
meta-analysis
manufacturing system
company
Opis:
Studies linking the use of lean practices to company performance have been increasing as markets are becoming more competitive and companies are eager for reducing waste and therefore implementing the Lean Management (LM) philosophy to improve performance. However, results from these studies have found various and different impacts and some light is needed. Extant literature was reviewed and, to achieve the research objective, a metaanalysis of correlations was carried out. The obtained results suggest a positive relationship between some lean practices and performance measures. Furthermore, the presence of moderators influencing the relationship between lean practices and performance outcomes is highlighted in our results. To our best knowledge, this is the first research that proposes a comparison of results from primary studies on Lean implementation, by analysing the linear relationship between lean practices and enterprise performance. It fills this gap and therefore represents an important contribution.
Źródło:
Management and Production Engineering Review; 2019, 10, 4; 11-24
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
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