Search results for " Modeling"
showing 10 items of 2411 documents
Tumor Marker Carbohydrate Antigen 125 Predicts Adverse Outcome After Transcatheter Aortic Valve Implantation
2013
ObjectivesThis study sought to predict the value of tumor marker carbohydrate antigen 125 (CA125) before and after transcatheter aortic valve implantation (TAVI) for all-cause death and a composite endpoint of death, admission for heart failure, myocardial infarction, and stroke (major adverse cardiac events [MACE]).BackgroundRisk stratification after TAVI remains challenging. The use of biomarkers in this setting represents an unmet need.MethodsCA125 was measured in 228 patients before and after TAVI. The association with outcomes was assessed using parametric Cox regression and joint modeling for baseline and longitudinal analyses, respectively. CA125 was evaluated as logarithm transforma…
Associations between loneliness, depressive symptoms and perceived togetherness in older people.
2005
This study explores the associations of loneliness with depressive symptoms in a five-year follow-up and describes how the six dimensions of perceived togetherness explain loneliness and depressive symptoms at baseline. The data were collected on 207 residents of Jyväskylä, central Finland, who at baseline in 1990 were aged 80; and 133 residents who at follow-up in 1995 were aged 85. Loneliness was assessed using a questionnaire item with four preset response options, perceived togetherness using the Social Provisions Scale, and depressive symptoms using the CES-D scale. A recursive structural equation model showed that in women but not in men, depressive symptoms predicted more experiences…
Three dimensional reconstruction to visualize atrial fibrillation activation patterns on curved atrial geometry
2021
BackgroundThe rotational activation created by spiral waves may be a mechanism for atrial fibrillation (AF), yet it is unclear how activation patterns obtained from endocardial baskets are influenced by the 3D geometric curvature of the atrium or ‘unfolding’ into 2D maps. We develop algorithms that can visualize spiral waves and their tip locations on curved atrial geometries. We use these algorithms to quantify differences in AF maps and spiral tip locations between 3D basket reconstructions, projection onto 3D anatomical shells and unfolded 2D surfaces.MethodsWe tested our algorithms in N = 20 patients in whom AF was recorded from 64-pole baskets (Abbott, CA). Phase maps were generated by…
Indoor air problems and the perceived social climate in schools: A multilevel structural equation analysis
2018
Indoor air problems in schools appear to influence learning outcomes and absence rates. However, previous research has not investigated whether indoor air problems influence the social climate of schools. Therefore, we studied whether indoor air problems observed in schools associate with students' perceptions of the teacher-student relationship and class spirit. The nationwide sample of Finnish schools (N = 194 schools/27153 students) was analyzed using multilevel structural equation modeling. Data on the schools' social climate collected from students were merged with independently collected data on observed indoor air problems from school principals. We found that the teacher-student rel…
Early maturation and substance use across adolescence and young adulthood: A longitudinal study of Finnish twins.
2017
AbstractEarly maturation, indexed by pubertal development (PD), has been associated with earlier initiation and greater frequency of adolescent substance use, but this relationship may be biased by confounding factors and effects that change across development. Using a population-based Finnish twin sample (N = 3,632 individuals), we conducted twin modeling and multilevel structural equation modeling of the relationship between PD and substance use at ages 12–22. Shared environmental factors contributed to early PD and heavier substance use for females. Biological father absence was associated with early PD for boys but not girls, and did not account for the relationship between PD and subst…
Validity and Internal Consistency of the Preschool-FLAT, a New Tool for the Assessment of Food Literacy in Young Children from the Training-To-Health…
2020
Background: The importance of assessing “food literacy” since youth has been highlighted and, to this purpose, valid and consistent instruments are needed. This study aimed to assess the validity and internal consistency of the preschool-FLAT (Food Literacy Assessment Tool). Methods. 505 children from 21 kindergartens, recruited within the Training-to-Health Project in Palermo (Italy), underwent oral sessions and activities on food-related aspects. Their knowledge/skills were recorded in the preschool-FLAT. The following scale measures were assessed: Content validity; internal consistency (Chronbach’s alpha coefficients); construct validity (Structural Equation Modeling&md…
Chutzpadik advertising and its effectiveness: Four studies of agencies and audiences
2021
Abstract The creation of advertisements that attract immediate attention and simultaneously provoke thoughts and stimulate ongoing discussions is challenging. Hence, advertisers increasingly use Chutzpadik advertising, which we define as “radical advertising messaging that purposefully transgresses social norms and proscribed topics”. We conduct four studies to identify the dimensions and evaluate the effectiveness of Chutzpadik advertising. The first two studies involve interviews with 12 managers of advertising agencies and 22 members of the Israeli general public (audience members). The interviews reveal Chutzpadik advertising’s dimensions are norm violation, novelty, and audacity. In tw…
Factors underlying attitude formation towards online banking in Finland
2002
The study explored the effect of different factors affecting attitude formation towards Internet banking (online banking) in Finland. The purpose of this paper is to determine those factors that influence the formation of attitude towards Internet banking on the one hand, and their relation to the use of online banking services, on the other. To attain these, a large survey (1,167 responses) was carried out during the summer of 2000 in Finland. Attitude formation was studied by the use of a structural equation model. The results are expected to provide both theoretical and practical contributions in the area of electronic retail banking and understanding of consumer behaviour in the turbule…
Brand credibility in cause‐related marketing: the moderating role of consumer values
2009
PurposeThe main purpose of this paper is to analyse the moderating effect of consumer altruistic values upon two drivers of brand credibility in cause‐related marketing (CrM): cause‐brand fit and consumer attribution of altruistic brand motivations.Design/methodology/approachThis is a quantitative study. Data have been collected through personal interviews at households using the random route sampling technique. The sample is formed by consumers of insurance and personal hygiene products, using different brand‐social cause combinations. Data have been analysed through structural equation modelling and multigroup analysis to test the moderation hypotheses.FindingsFindings show that altruisti…
Why do people purchase from food delivery apps? A consumer value perspective
2021
Consumers are increasingly using food delivery apps (FDAs) to facilitate convenient and quick food delivery. Yet, the existing research offers a limited understanding of consumers’ behavioral responses to the visibility and values derived from FDAs. Our study utilized the theory of consumption values (TCV) to examine associations between FDA visibility, consumption values, and purchase intentions. The mediating role of consumption values and the moderating role of attitude was also studied. A qualitative study was conducted with 15 FDA consumers to derive context-specific consumption values. Responses from 355 FDA consumers from the United States of America (USA) were obtained through Proli…