Use of Factor Analysis to Characterize Arterial Geometry and Predict Hemodynamic Risk: Application to the Human Carotid Bifurcation

2010 ◽  
Vol 132 (11) ◽  
Author(s):  
Qi Zhang ◽  
David A. Steinman ◽  
Morton H. Friedman
Keyword(s):  
Factor Analysis ◽  
Relative Risk ◽  
Magnetic Resonance Images ◽  
Size Factor ◽  
Cross Sectional ◽  
Data Set ◽  
Apparent Lack ◽  
Geometric Variables ◽  
Human Carotid

The detailed geometry of atherosclerosis-prone vascular segments may influence their susceptibility by mediating local hemodynamics. An appreciation of the role of specific geometric variables is complicated by the considerable correlation among the many parameters that can be used to describe arterial shape and size. Factor analysis is a useful tool for identifying the essential features of such an inter-related data set, as well as for predicting hemodynamic risk in terms of these features and for interpreting the role of specific geometric variables. Here, factor analysis is applied to a set of 14 geometric variables obtained from magnetic resonance images of 50 human carotid bifurcations. Two factors alone were capable of predicting 12 hemodynamic metrics related to shear and near-wall residence time with adjusted squared Pearson’s correlation coefficient as high as 0.54 and P-values less than 0.0001. One factor measures cross-sectional expansion at the bifurcation; the other measures the colinearity of the common and internal carotid artery axes at the bifurcation. The factors explain the apparent lack of an effect of branch angle on hemodynamic risk. The relative risk among the 50 bifurcations, based on time-average wall shear stress, could be predicted with a sensitivity and specificity as high as 0.84. The predictability of the hemodynamic metrics and relative risk is only modestly sensitive to assumptions about flow rates and flow partitions in the bifurcation.

scholarly journals Measuring Relationship Quality in an International Study

2016 ◽  
Vol 28 (8) ◽  
pp. 920-930 ◽  
Author(s):  
Jill M. Chonody ◽  
Jacqui Gabb ◽  
Mike Killian ◽  
Priscilla Dunk-West
Keyword(s):  
Factor Analysis ◽  
Relationship Quality ◽  
Structural Equation ◽  
Community Sample ◽  
International Study ◽  
Equation Modeling ◽  
Future Research ◽  
Cross Sectional ◽  
Data Set ◽  
Convergent Construct Validity

Objective: This study reports on the operationalization and testing of the newly developed Relationship Quality (RQ) scale, designed to assess an individual’s perception of his or her RQ in their current partnership. Methods: Data were generated through extended sampling from an original U.K.-based research project, Enduring Love? Couple relationships in the 21st century. This mixed methods study was designed to investigate how couples experience, understand, and sustain their long-term relationships. This article utilizes the cross-sectional, community sample ( N = 8,132) from this combined data set, drawn primarily from the United Kingdom, United States, and Australia. A two-part approach to scale development was employed. An initial 15-item pool was subjected to exploratory factor analysis leading into confirmatory factor analysis using structural equation modeling. Results: The final 9-item scale evidenced convergent construct validity and known-groups validity along with strong reliability. Conclusion: Implications for future research and professional practice are discussed.

Nigerian (Yoruba) version of Disabilities of the Arm, Shoulder and Hand questionnaire (DASH-Y): Cross-cultural adaptation and initial validation

Hand Therapy ◽  
2016 ◽  
Vol 21 (4) ◽  
pp. 140-150 ◽  
Author(s):  
Adesola C Odole ◽  
Nse A Odunaiya ◽  
Chidinma F Mbaike ◽  
Peter O Ibikunle ◽  
Adefemi A Akinseloyin ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Upper Extremity ◽  
Rank Correlation ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Data Set ◽  
Initial Validation ◽  
Culturally Adapted ◽  
Conceptual Equivalence ◽  
Dash Questionnaire

Introduction The Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire is a widely used upper extremity outcome measure. However, it is yet to be translated into any of the major languages in Nigeria, thus limiting its utility in the Nigerian clinical setting. The aim of this study was to cross-culturally adapt the DASH questionnaire into Yoruba, a major Nigerian language and investigate its initial validation. Methods The English version of DASH was adapted into Yoruba through forward–back translations, experts’ committee meetings, pretesting and cognitive debriefing interview in accordance with the guidelines recommended by the developers of DASH. Fifty-two purposively selected patients with upper extremity musculoskeletal disorders participated in a cross-sectional survey. Factor analysis was performed to ensure structural validity of Yoruba version, and construct validity was investigated with Spearman rank correlation coefficient. Results The Yoruba version of DASH has semantic, idiomatic, linguistic and conceptual equivalence with the English DASH. Thirty linear components were identified within the data set. Principal factor analysis of the Yoruba DASH revealed a seven factor scale, having fulfilled all the necessary conditions. The Kaiser-Meyer-Olkin measure of sampling adequacy was 0.61, and Barlett’s test of Sphericity was adequate and significant (χ2 (1066) = 435, p = 0.001). Significant correlation (r = 0.994, p = 0.001) exists between scores obtained on English and Yoruba versions of DASH. Conclusion A cross-culturally adapted, valid Yoruba version of DASH is available for use in in south western Nigeria and other similar populations.

scholarly journals Healthy dietary indices and risk of depressive outcomes: a systematic review and meta-analysis of observational studies

2018 ◽  
Vol 24 (7) ◽  
pp. 965-986 ◽  
Author(s):  
Camille Lassale ◽  
G. David Batty ◽  
Amaria Baghdadli ◽  
Felice Jacka ◽  
Almudena Sánchez-Villegas ◽  
...  
Keyword(s):  
Systematic Review ◽  
Relative Risk ◽  
Longitudinal Studies ◽  
Mediterranean Diet ◽  
Meta Analysis ◽  
Healthy Diet ◽  
Dietary Inflammatory Index ◽  
Cross Sectional ◽  
Inflammatory Index

AbstractWith depression being the psychiatric disorder incurring the largest societal costs in developed countries, there is a need to gather evidence on the role of nutrition in depression, to help develop recommendations and guide future psychiatric health care. The aim of this systematic review was to synthesize the link between diet quality, measured using a range of predefined indices, and depressive outcomes. Medline, Embase and PsychInfo were searched up to 31st May 2018 for studies that examined adherence to a healthy diet in relation to depressive symptoms or clinical depression. Where possible, estimates were pooled using random effect meta-analysis with stratification by observational study design and dietary score. A total of 20 longitudinal and 21 cross-sectional studies were included. These studies utilized an array of dietary measures, including: different measures of adherence to the Mediterranean diet, the Healthy Eating Index (HEI) and Alternative HEI (AHEI), the Dietary Approaches to Stop Hypertension, and the Dietary Inflammatory Index. The most compelling evidence was found for the Mediterranean diet and incident depression, with a combined relative risk estimate of highest vs. lowest adherence category from four longitudinal studies of 0.67 (95% CI 0.55–0.82). A lower Dietary Inflammatory Index was also associated with lower depression incidence in four longitudinal studies (relative risk 0.76; 95% CI: 0.63–0.92). There were fewer longitudinal studies using other indices, but they and cross-sectional evidence also suggest an inverse association between healthy diet and depression (e.g., relative risk 0.65; 95% CI 0.50–0.84 for HEI/AHEI). To conclude, adhering to a healthy diet, in particular a traditional Mediterranean diet, or avoiding a pro-inflammatory diet appears to confer some protection against depression in observational studies. This provides a reasonable evidence base to assess the role of dietary interventions to prevent depression. This systematic review was registered in the PROSPERO International Prospective Register of Systematic Reviews under the number CRD42017080579.

Prediction of Disturbed Flow by Factor Analysis of Carotid Bifurcation Geometry

2009 ◽  
Author(s):  
Qi Zhang ◽  
David A. Steinman ◽  
Morton H. Friedman
Keyword(s):  
Factor Analysis ◽  
A Priori ◽  
Carotid Bifurcation ◽  
Geometric Features ◽  
Mr Images ◽  
Disturbed Flow ◽  
Atherosclerotic Lesions ◽  
Geometric Variables ◽  
The Relationship

Hemodynamics plays an important role in the development and progression of carotid artery atherosclerotic lesions. Certain aspects of vascular geometry, which mediates local hemodynamics, might be risk factors that increase a vessel’s atherosusceptibility [1]. To further evaluate this “geometric risk factor” hypothesis, the relationship between geometric features and hemodynamic quantities thought to typify “disturbed flow” was recently investigated [2]. Fourteen intercorrelated geometric features were initially extracted from MR images of 50 carotid bifurcations, and multivariate regression based on an a priori selection of a subset of four of these geometric features was used to identify two that were predictors of disturbed hemodynamics. Here, this work is extended to simultaneously analyze the combined role of all geometric variables using factor analysis.

scholarly journals Energy efficiency and the role of energy-related financial literacy: evidence from the European residential sector

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Nina Boogen ◽  
Cristina Cattaneo ◽  
Massimo Filippini ◽  
Adrian Obrist
Keyword(s):  
Energy Efficiency ◽  
Financial Literacy ◽  
Cognitive Abilities ◽  
Stochastic Frontier ◽  
Electricity Consumption ◽  
Cross Sectional ◽  
Data Set ◽  
Residential Sector ◽  
The Us

AbstractIn this paper, we analyze the level of efficiency in the use of electricity in the European residential sector relying on a cross-sectional data set comprised of 1375 households located in Italy, the Netherlands, and Switzerland and observed in 2016. To do this, we estimate an electricity demand frontier function using a stochastic frontier approach. The empirical results show that the residential sector in these three European countries could save approximately 20% of its total electricity consumption on average if it improves the level of efficiency in the use of electricity. These figures are in line with recent studies for Switzerland and for the US residential sector. Moreover, we link energy efficiency to energy-related financial literacy. We find that while energy-relevant knowledge per se does not play a significant role, stronger cognitive abilities are associated with higher levels of energy efficiency.

The role of cognitive proximity on supply chain collaboration for radical and incremental innovation: a study of a transition economy

2019 ◽  
Vol 34 (3) ◽  
pp. 591-604 ◽  
Author(s):  
Mai Anh Thi Nguyen ◽  
Hui Lei ◽  
Khoa Dinh Vu ◽  
Phong Ba Le
Keyword(s):  
Factor Analysis ◽  
Supply Chain ◽  
Transition Economy ◽  
Incremental Innovation ◽  
Equation Modeling ◽  
Supply Chain Collaboration ◽  
Cross Sectional ◽  
Incentive Alignment ◽  
Content Type

PurposeThe purpose of this paper is to investigate the role of cognitive proximity on supply chain collaboration and how it relates to radical and incremental innovation.Design/methodology/approachThe paper is based on quantitative approach to analyze the data of 218 firms in a developing and transition economy. The proposal model is tested with exploratory factor analysis (EFA), confirmatory factor analysis (CFA) and structural equation modeling (SEM).FindingsThe authors’ findings show that cognitive proximity facilitates decision synchronization and incentive alignment in the supply chain. Furthermore, the authors’ results indicate that information sharing and decision synchronization are determinants of radical innovation while incentive alignment is a determinant of incremental innovation.Research limitations/implicationsThis study was cross-sectional, so the authors could not consider the control variable such as sectors or firms’ size. It is hard to control the specific features of cognitive proximity in one single industry when using cross-sectional data. In future investigations, it may be possible to use a different dimension of proximity to explain the implementation of collaboration for innovation.Originality/valueThis study attempted to explore the role of cognitive proximity on supply chain implementation process in the context of a transition economy. Moreover, the authors’ findings provide the clearer understanding of the relationship between collaboration and innovation.

Recidivism and Reentry: The Role of Individual Coping Styles

2018 ◽  
Vol 65 (1) ◽  
pp. 46-68 ◽  
Author(s):  
Ashleigh LaCourse ◽  
Shelley Johnson Listwan ◽  
Shannon Reid ◽  
Jennifer L. Hartman
Keyword(s):  
Mental Illness ◽  
Coping Styles ◽  
High Rate ◽  
Correctional Staff ◽  
Cross Sectional ◽  
Data Set ◽  
Financial Difficulties ◽  
Current Article ◽  
The Relationship

The high rate of recidivism among those reentering the community post incarceration can be partially attributed to various barriers to reentry, including unemployment, financial difficulties, and mental illness. Learning to cope with these barriers is demanding and stressful for many people. The current article examines whether individual coping styles could act as a significant predictor of recidivism. Utilizing a cross-sectional data set collected from previously incarcerated individuals, this study examines the relationship between individual coping styles and arrest or reincarceration. Results from this study indicate a relationship between coping and arrest. Implications from this study are noteworthy given that our understanding of coping can increase the ability of the correctional staff to reduce later recidivism in the community.

Customer’s patronage decision toward health insurance products

2018 ◽  
Vol 30 (1) ◽  
pp. 62-83 ◽  
Author(s):  
Muhammad Sabbir Rahman ◽  
Fadi Abdel Muniem Abdel Fattah ◽  
Mahmud Zaman ◽  
Hasliza Hassan
Keyword(s):  
Factor Analysis ◽  
Health Insurance ◽  
Service Quality ◽  
Structural Equation ◽  
Service Providers ◽  
Dominant Role ◽  
Equation Modeling ◽  
Cross Sectional ◽  
Content Type

Purpose The purpose of this paper is to examine the influence of service quality, customer’s satisfaction and religiosity on customer’s patronage decision toward health insurance products. The paper also assesses the influence of religiosity on customer’s patronage decision. The influence of customers’ satisfaction as mediation between service quality and customer’s patronage decision was also measured. Design/methodology/approach A structured questionnaire was developed and administered to a sample of 200 respondents. This research applied the exploratory factor analysis, the confirmatory factor analysis and the structural equation modeling to test the proposed hypotheses. Findings The findings indicate that customers’ religiosity behavior has a significant influence on customer’s patronage decision for selecting health insurance products. The results also indicated that the role of customer’s satisfaction as a mediator in between the relationship of service quality and customer’s patronage decision is significant. Research limitations/implications This research is a cross-sectional study consisting of 200 respondents. In addition, the elements of the sample were Malaysian customers using health insurance products and services. Practical implications This study suggests that customers of health insurance products are more concerned with perceived service quality and perceived satisfaction. The role of religiosity also plays a dominant role. As a result, managers of the health insurance service providers need to focus more on benefits of service varieties centered toward their target customers in order to gain higher patronage decision of health insurance products. Originality/value The study sought to address the gap of religiosity aspects in health insurance products through intensive literature and offer a conceptual framework that tested service quality, customer’s satisfaction and religiosity in one integrated model under the perspective of health insurance industry. More importantly, it also examines the influence of religiosity on patronage behavior, thus shedding insights into the opportunities for understanding consumers in detail.

scholarly journals The Impression of Emotional Intelligence on University Students’ Academic Performance

2019 ◽  
Vol 8 (3) ◽  
pp. 2171-2178
Keyword(s):  
Factor Analysis ◽  
Emotional Intelligence ◽  
Academic Performance ◽  
University Students ◽  
Contemporary Society ◽  
Cross Sectional ◽  
Optimum Utilization ◽  
The University ◽  
Academic Scores

In the present contemporary society, the Emotional Intelligence is a nominal character that has become the part of the debate nowadays, and which acts as the source of most logistic litigation of the one’s character. Emotional Intelligence, though contemplates about one’s behaviouristic approach towards knowledge, skills, and attitude that epitomizes the worth efficiency of the students in the University and that can lead to the optimum utilization of the worth-full resources so that the aims and objectives can be fulfilled and that standard of thinking proceedings can be optimized to a great extent. The role of emotional intelligence in the process of elevating the academic performances of the students has been reviewed in many of the countries and through many of the authors. But, it has been found in this study that there is no to a very limited number of studies who all have investigated the role of emotions in the process of capturing better academic scores through education. The author thus, elucidated about the scenario which states the effect of Emotional Intelligence (EI) on the academic performance of the University Students. The study also assesses the prevailing scenario in-order to suggests some points that excavate the situation to the next level and is targeted at finding the correlation that exists between each of the factors of the Emotional Intelligence. The data that is collected through the well-structured and closed-ended questions that are found to be reliable enough as per statistics. The authors have done the analysis through various tests, i.e., Factor Analysis, Correlation, and MANOVA. After testing, positive and strong correlation is been found between each of the factors of Emotional Intelligence and it leads to the conclusion that the academic performance of the students is affected from Emotional Intelligence on. The resources used for data collection were limited as per the range of access of researcher’s leading to an analysis which can’t be to the complete world. Also, the cross-sectional data is been collected because of time constraint. The whole circumstances state that the different attributes of correlation are matched to the Emotional Intelligence of the University students and though it has been proved that Emotional appearance of the students is the key to understand the permutation and combination of the Intellectual complexities of the work over a period of the time.

scholarly journals Applying P-Technique Factor Analysis to Explore Person-Specific Models of Readiness-to-Exercise

2021 ◽  
Vol 3 ◽  
Author(s):  
Kelley Strohacker ◽  
Richard Keegan ◽  
Cory T. Beaumont ◽  
Rebecca A. Zakrajsek
Keyword(s):  
Factor Analysis ◽  
Conceptual Development ◽  
Subjective Experience ◽  
Subjective Experiences ◽  
Cross Sectional ◽  
Research Implementation ◽  
Psychometric Scales ◽  
Novel Concept

Recent research in exercise prescription and periodization has emphasized the importance of subjective experience, both in medium- and long-term monitoring, but also in the acute experience. Emerging evidence also highlights an important role of subjective readiness (pre-exercise mental and physical states) in determining how exercise is experienced, and in acutely modifying the prescribed exercise intensity. The concept of “readiness-to-exercise” shows promise in enabling and informing this acute decision-making to optimize the experiences and outcomes of exercise. While subjective experiences can be effectively assessed using psychometric scales and instruments, these are often developed and deployed using cross-sectional samples, with resulting structures that reflect a normative pattern (nomothetic). These patterns may fail to reflect individual differences in sensitivity, experience and saliency (idiographic). We conducted this research with the primary aim of comparing the nomothetical and idiographic approaches to modeling the relatively novel concept of readiness-to-exercise. Study 1 (nomothetic) therefore analyzed data collected from 572 participants who completed a one-time survey using R-technique factor analysis. Results indicated a four-factor structure that explained 60% of the variance: “health and fitness;” “fatigue;” “vitality” and “physical discomfort.” Study 2 (idiographic) included a sample of 29 participants who completed the scale multiple times, between 42 and 56 times: permitting intra-individual analysis using separate P-technique factor analyses. Our analyses suggested that many individuals displayed personal signature, or “profiles” of readiness-to-exercise that differed in structure from the nomothetic form: only two participants' personal signatures contained four structures as modeled in Study 1, whereas the majority demonstrated either two or three factors. These findings raise important questions about how experiential data should be collected and modeled, for use in research (conceptual development and measurement) and applied practice (prescribing, monitoring)—as well as in more applied research (implementation, effectiveness).

Sign in / Sign up

Export Citation Format

Share Document