Search results for "Causa"

erman case control study on childhood leukaemia - Basic considerations, methodology and summary of the results

1998

In order to explore potential risk factors of childhood leukaemia, a case control study was performed including all incident cases from 1992 to 1994. The study was based on the German Childhood Cancer Registry. It was restricted to cases from West Germany and extended retrospectively until 1980 for children who were living in regions covered by a previous incidence study on nuclear installations (21). The study was conducted in close correspondence with a preceding case control study in Lower Saxony (13). Results of this study and of others published in the literature were used to define explicit hypotheses for the present study. This paper presents the methodology of the study and gives an…

Opioid switching in patients with advanced cancer followed at home. A retrospective analysis.

2013

Abstract CONTEXT: Opioid switching has been found to improve opioid responsiveness in different conditions. However, data on opioid switching performed at home are almost nonexistent, despite the fact that most patients are followed at home. OBJECTIVES: The aim of this retrospective survey was to determine frequency, indications, usefulness, and safety of opioid switching when treating advanced cancer-related pain in patients followed at home. METHODS: A retrospective review of data from patients with advanced cancer followed at home by three home care teams for a period of two years was performed. Patients who had their opioids switched were selected. Reasons for switching opioid doses and…

Polyphenol intake and mortality risk: a re-analysis of the PREDIMED trial

2014

[Background] Polyphenols may lower the risk of cardiovascular disease (CVD) and other chronic diseases due to their antioxidant and anti-inflammatory properties, as well as their beneficial effects on blood pressure, lipids and insulin resistance. However, no previous epidemiological studies have evaluated the relationship between the intake of total polyphenols intake and polyphenol subclasses with overall mortality. Our aim was to evaluate whether polyphenol intake is associated with all-cause mortality in subjects at high cardiovascular risk.

Impact of cause‐related marketing on consumer advocacy and cause participation: A causal model based on self‐reports and eye‐tracking measures

2021

Effectuation and foreign market entry of entrepreneurial firms

2015

Purpose – The purpose of this study is to examine the decision-making process for entrepreneurial firms when entering foreign markets and how and why they entered those markets. Design/methodology/approach – A nascent theory in entrepreneurship called effectuation is combined with internationalization process theory as the conceptual framework to study decision-making under uncertainty. The central concept in both these theories is relationships and how they can be used to gain knowledge and thus reduce uncertainty and in the case of effectuation to co-create opportunities to enter foreign markets. The research design involves a multiple case study of software firms from Finland and New Ze…

Cognitive and Affective Causes of Consumer Dissatisfaction With the Hospitality Encounter

2009

Causality attributions, equity, and affection used to explain satisfaction have received special attention in the literature on dissatisfaction and complaining behavior. In this study we examine the contribution these three antecedents make to consumer dissatisfaction. A causal model has been constructed to examine the effect of these variables on dissatisfaction in a sample of 345 individuals who have had an unsatisfactory experience in a restaurant. The results show that attributions, inequity, and negative affections have a significant, direct and positive influence on the level of dissatisfaction, with attribution as the most influential explanatory variable.

Using a brief questionnaire to assess the overall perception of basketball spectators

2014

Purpose – The purpose of this paper is twofold. The first aim is to obtain a valid and reliable instrument for the holistic analysis of sporting events, and the second is to test a causal model in which future intentions depend on spectators’ perceptions of quality, satisfaction, and value of these events. Design/methodology/approach – A total of 493 spectators of a professional basketball team in the Spanish ACB league responded to a survey to measure the overall performance of the sporting event service. Exploratory factor analysis and further confirmatory factor analysis using structural equation models provides the methodology for testing the reliability and validity of the instrument.…

Value antecedents in relationship between tourism companies

2014

Purpose – In the context of relationship marketing, identifying the elements that contribute to creating value for companies has become essential for managing customer satisfaction and retention. The literature has focused on business-to-end consumer relationships and there are few contributions in the business-to-business context, especially in the tourism industry. The aim of this study is to analyze the process of relationship value creation between tourism companies from the more relevant antecedents proposed in the literature: relationship benefits, long-term orientation and attitude towards the main provider. Design/methodology/approach – A survey was conducted with 309 travel agency…

Accelerating Causal Inference and Feature Selection Methods through G-Test Computation Reuse

2021

This article presents a novel and remarkably efficient method of computing the statistical G-test made possible by exploiting a connection with the fundamental elements of information theory: by writing the G statistic as a sum of joint entropy terms, its computation is decomposed into easily reusable partial results with no change in the resulting value. This method greatly improves the efficiency of applications that perform a series of G-tests on permutations of the same features, such as feature selection and causal inference applications because this decomposition allows for an intensive reuse of these partial results. The efficiency of this method is demonstrated by implementing it as…

Assessing the role of evidence of mechanisms in causal extrapolation

2020

Extrapolation of causal claims from study populations to other populations of interest is a problematic issue. The standard approach in experimental research, which prioritises randomized controlled trials and statistical evidence, is not devoid of difficulties. Granted that, it has been defended that evidence of mechanisms is indispensable for causal extrapolation. We argue, contrarily, that this sort of evidence is not indispensable. Nonetheless, we also think that occasionally it may be helpful. In order to clarify its relevance, we introduce a distinction between a positive and a negative role of evidence of mechanisms. Our conclusion is that the former is highly questionable, but the l…