scholarly journals A Systematic Review of the Effect of Expectancy on Treatment Responses to Acupuncture

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Ben Colagiuri ◽  
Caroline A. Smith
Keyword(s):  
Meta Analysis ◽  
Future Research ◽  
Placebo Acupuncture ◽  
Study Characteristics ◽  
Treatment Responses ◽  
Methodological Considerations ◽  
Randomised Controlled ◽  
Study Designs ◽  
The Relationship ◽  
Relevant Outcome

Randomised controlled trials (RCTs) of acupuncture often find equivalent responses to real and placebo acupuncture despite both appearing superior to no treatment. This raises questions regarding the mechanisms of acupuncture, especially the contribution of patient expectancies. We systematically reviewed previous research assessing the relationship between expectancy and treatment responses following acupuncture, whether real or placebo. To be included, studies needed to assess and/or manipulate expectancies about acupuncture and relate these to at least one health-relevant outcome. Nine such independent studies were identified through systematic searches of Medline, PsycInfo, PubMed, and Cochrane Clinical Trials Register. The methodology and reporting of these studies were quite heterogeneous, meaning that meta-analysis was not possible. A descriptive review revealed that five studies found statistically significant effects of expectancy on a least one outcome, with three also finding evidence suggestive of an interaction between expectancy and type of acupuncture (real or placebo). While there were some trends in significant effects in terms of study characteristics, their generality is limited by the heterogeneity of study designs. The differences in design across studies highlight some important methodological considerations for future research in this area, particularly regarding whether to assess or manipulate expectancies and how best to assess expectancies.

Cause and effect in studies on unemployment, mental health and suicide: a meta-analytic and conceptual review

2013 ◽  
Vol 44 (5) ◽  
pp. 909-917 ◽  
Author(s):  
A. Milner ◽  
A. Page ◽  
A. D. LaMontagne
Keyword(s):  
Mental Health ◽  
Meta Analysis ◽  
Population Based ◽  
Future Research ◽  
Temporal Relationships ◽  
Causal Assumptions ◽  
Confounder Adjustment ◽  
Past Experiences ◽  
Study Designs ◽  
The Relationship

BackgroundThere are ongoing questions about whether unemployment has causal effects on suicide as this relationship may be confounded by past experiences of mental illness. The present review quantified the effects of adjustment for mental health on the relationship between unemployment and suicide. Findings were used to develop and interpret likely causal models of unemployment, mental health and suicide.MethodA random-effects meta-analysis was conducted on five population-based cohort studies where temporal relationships could be clearly ascertained.ResultsResults of the meta-analysis showed that unemployment was associated with a significantly higher relative risk (RR) of suicide before adjustment for prior mental health [RR 1.58, 95% confidence interval (CI) 1.33–1.83]. After controlling for mental health, the RR of suicide following unemployment was reduced by approximately 37% (RR 1.15, 95% CI 1.00–1.30). Greater exposure to unemployment was associated with higher RR of suicide, and the pooled RR was higher for males than for females.ConclusionsPlausible interpretations of likely pathways between unemployment and suicide are complex and difficult to validate given the poor delineation of associations over time and analytic rationale for confounder adjustment evident in the revised literature. Future research would be strengthened by explicit articulation of temporal relationships and causal assumptions. This would be complemented by longitudinal study designs suitable to assess potential confounders, mediators and effect modifiers influencing the relationship between unemployment and suicide.

scholarly journals Mood Disorders and Gluten: It’s Not All in Your Mind! A Systematic Review with Meta-Analysis

Nutrients ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1708 ◽  
Author(s):  
Eleanor Busby ◽  
Justine Bold ◽  
Lindsey Fellows ◽  
Kamran Rostami
Keyword(s):  
Systematic Review ◽  
Mood Disorders ◽  
Prospective Studies ◽  
Meta Analysis ◽  
Cochrane Library ◽  
Future Research ◽  
One Year ◽  
Randomised Controlled ◽  
Meta Analyses ◽  
The Relationship

Gluten elimination may represent an effective treatment strategy for mood disorders in individuals with gluten-related disorders. However, the directionality of the relationship remains unclear. We performed a systematic review of prospective studies for effects of gluten on mood symptoms in patients with or without gluten-related disorders. Six electronic databases (CINAHL, PsycINFO, Medline, Web of Science, Scopus and Cochrane Library) were searched, from inception to 8 August 2018, for prospective studies published in English. Meta-analyses with random-effects were performed. Three randomised-controlled trials and 10 longitudinal studies comprising 1139 participants fit the inclusion criteria. A gluten-free diet (GFD) significantly improved pooled depressive symptom scores in GFD-treated patients (Standardised Mean Difference (SMD) −0.37, 95% confidence interval (CI) −0.55 to −0.20; p < 0.0001), with no difference in mean scores between patients and healthy controls after one year (SMD 0.01, 95% CI −0.18 to 0.20, p = 0.94). There was a tendency towards worsening symptoms for non-coeliac gluten sensitive patients during a blinded gluten challenge vs. placebo (SMD 0.21, 95% CI −0.58 to 0.15; p = 0.25). Our review supports the association between mood disorders and gluten intake in susceptible individuals. The effects of a GFD on mood in subjects without gluten-related disorders should be considered in future research.

A Meta-Analytic Review of the Relationship Between Learning Organization and Organizational Performance and Employee Attitudes: Using the Dimensions of Learning Organization Questionnaire

2021 ◽  
pp. 153448432098736
Author(s):  
Boreum Ju ◽  
Yunsoo Lee ◽  
Sunyoung Park ◽  
Seung Won Yoon
Keyword(s):  
Organizational Performance ◽  
National Culture ◽  
Learning Organization ◽  
Meta Analysis ◽  
Negative Relationship ◽  
Employee Attitudes ◽  
Future Research ◽  
Analytic Review ◽  
Dimensions Of Learning ◽  
The Relationship

The purpose of this meta-analysis study is to examine the correlations between the Dimensions of Learning Organization Questionnaire (DLOQ) and frequently examined outcomes including organizational performance and employee attitudes. Positive relationships were found between the DLOQ and organizational performance (e.g., financial, knowledge, and innovative performance) and employee attitudes (e.g., organizational commitment and job satisfaction) and the sub-dimensions (e.g., affective, continuance, and normative commitment), with a notable exception of a negative relationship between the DLOQ and turnover. Because the DLOQ has been used in many countries over the years, this study also examined the influence of national culture on the outcomes. Power distance moderated the relationship between the learning organization and overall organizational performance. Our meta-analytic review makes substantive contributions to the literature on the learning organization concept and the study of national culture as a significant moderator. Implications of these findings and suggestions for future research are discussed.

scholarly journals Vitamin D deficiency and depression in adults: systematic review and meta-analysis

2013 ◽  
Vol 202 (2) ◽  
pp. 100-107 ◽  
Author(s):  
Rebecca E. S. Anglin ◽  
Zainab Samaan ◽  
Stephen D. Walter ◽  
Sarah D. McDonald
Keyword(s):  
Systematic Review ◽  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Randomised Controlled Trials ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Cross Sectional ◽  
Cross Sectional Studies ◽  
Randomised Controlled ◽  
The Relationship

BackgroundThere is conflicting evidence about the relationship between vitamin D deficiency and depression, and a systematic assessment of the literature has not been available.AimsTo determine the relationship, if any, between vitamin D deficiency and depression.MethodA systematic review and meta-analysis of observational studies and randomised controlled trials was conducted.ResultsOne case-control study, ten cross-sectional studies and three cohort studies with a total of 31 424 participants were analysed. Lower vitamin D levels were found in people with depression compared with controls (SMD = 0.60,95% Cl 0.23–0.97) and there was an increased odds ratio of depression for the lowest v. highest vitamin D categories in the cross-sectional studies (OR = 1.31, 95% CI 1.0–1.71). The cohort studies showed a significantly increased hazard ratio of depression for the lowest v. highest vitamin D categories (HR=2.21, 95% CI 1.40–3.49).ConclusionsOur analyses are consistent with the hypothesis that low vitamin D concentration is associated with depression, and highlight the need for randomised controlled trials of vitamin D for the prevention and treatment of depression to determine whether this association is causal.

scholarly journals Specificity of Future Thinking in Depression: A Meta-Analysis

2018 ◽  
Author(s):  
Beau Gamble ◽  
David Moreau ◽  
Lynette J. Tippett ◽  
Donna Rose Addis
Keyword(s):  
Random Effects ◽  
Meta Analysis ◽  
Emotional Valence ◽  
Effect Sizes ◽  
Current Evidence ◽  
Future Research ◽  
Future Thinking ◽  
Moderator Variables ◽  
Search Terms ◽  
The Relationship

Reduced specificity of autobiographical memory has been well established in depression, but whether this ‘overgenerality’ extends to future thinking has not been the focus of a meta-analysis. Following a preregistered protocol, we searched six electronic databases, Google Scholar, personal libraries, and contacted authors in the field for studies matching search terms related to depression, future thinking, and specificity. We reduced an initial 7,332 results to 46 included studies, with 89 effect sizes and 4,813 total participants. Random effects meta-analytic modelling revealed a small but robust correlation between reduced future specificity and higher levels of depression (r = .13, p &lt; .001). Of the 11 moderator variables examined, the most striking effects related to the emotional valence of future thinking (p &lt; .001) and the sex of participants (p = .025). Namely, depression was linked to reduced specificity for positive (but not negative or neutral) future thinking, and the relationship was stronger in samples with a higher proportion of males. This meta-analysis contributes to our understanding of how prospection is altered in depression and dysphoria and, by revealing areas where current evidence is inconclusive, highlights key avenues for future research.

The relationship between work engagement and workaholism: a systematic review and meta-analysis

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yunsoo Lee ◽  
Jae Young Lee ◽  
Jin Lee
Keyword(s):  
Systematic Review ◽  
Work Engagement ◽  
Design Methodology ◽  
Meta Analysis ◽  
Future Research ◽  
Content Type ◽  
Extant Literature ◽  
Heavy Work ◽  
Person Centered Approach ◽  
The Relationship

Purpose The purpose of this study is to clarify the relationship between two sub-constructs of heavy work investment: work engagement and workaholism. Design/methodology/approach The authors conducted a systematic review and meta-analysis to synthesize and critically assess existing research on the relationship between these concepts. Findings The review revealed three major shortcomings of the extant literature: a dichotomous perspective, variations in measurements and the unaddressed complexity of the relationship. Originality/value Based on these findings, this study provides a discussion on the limitations and suggestions for future research on work engagement and workaholism, including using a person-centered approach.

scholarly journals A meta-analysis of natural resources and conflict

2019 ◽  
Vol 6 (1) ◽  
pp. 205316801881823 ◽  
Author(s):  
William O’Brochta
Keyword(s):  
Natural Resources ◽  
Natural Resource ◽  
Meta Analysis ◽  
Civil Conflict ◽  
Future Research ◽  
Aggregate Effect ◽  
Resource Wealth ◽  
Natural Resource Wealth ◽  
The Relationship ◽  
Variable Measurement

The relationship between natural resource wealth and civil conflict remains unclear, despite prolonged scholarly attention. Conducting a meta-analysis—a quantitative literature review—can help synthesize this broad and disparate field to provide clearer directions for future research. Meta-analysis tools determine both the aggregate effect of natural resources on conflict and whether any particular ways in which variables are measured systematically bias the estimated effect. I conduct a meta-analysis using sixty-nine studies from sixty-two authors. I find that there is no aggregate relationship between natural resources and conflict. Most variation in variable measurement does not alter the estimated effect. However, measuring natural resource wealth using Primary Commodity Exports and including controls for mountainous terrain and ethnic fractionalization all do significantly impact the results. These findings suggest that it may be worth exploring more nuanced connections between natural resources and conflict instead of continuing to study the overall relationship.

scholarly journals Entrepreneurial Experience and Performance: From the Aspect of Sustainable Growth of Enterprises

2020 ◽  
Vol 12 (18) ◽  
pp. 7351
Author(s):  
Huatao Peng ◽  
Chen Zhou ◽  
Yang Liu
Keyword(s):  
Work Experience ◽  
Meta Analysis ◽  
Dynamic Environment ◽  
Sustainable Growth ◽  
Future Research ◽  
High Tech ◽  
Entrepreneurial Performance ◽  
Entrepreneurial Experience ◽  
Start Up ◽  
The Relationship

In the uncertain entrepreneurial ecosystem, scholarly knowledge is bounded by the sustainable growth of entrepreneurial enterprises. Moreover, there is a lack of consensus in academic circles on the relationship between entrepreneurial experience and entrepreneurial performance. In adopting the meta-analysis method, we found a significant relationship between entrepreneurial experience and entrepreneurial performance based on an investigation of 45 independent samples (N = 18,752). We also examined theoretically derived moderators of this relationship referring to firm age, industry condition and experience type to test whether the moderating effects can explain the inconsistent research results on the relationship between entrepreneurial experience and entrepreneurial performance. The relationship was stronger for the high-tech industry than for low-tech industry, for the early business stage than for late business stage and for start-up experience compared to management experience, work experience and industry experience. Our research findings are meaningful for practitioners to achieve sustainable growth by better preserving and coordinating entrepreneurial experience in a dynamic environment. Further, these findings are also important for future research to analyze the factors triggering the heterogeneity of entrepreneurial experience and to investigate the extent to which the start-up experience is more capable of promoting entrepreneurial performance.

scholarly journals Mapping Market-Based Accounting Research in Indonesia: Graphics and Guidelines for Future Research

2017 ◽  
Vol 2 (1) ◽  
pp. 18-44
Author(s):  
Novrys Suhardianto ◽  
Bambang Subroto ◽  
Grahita Chandrarin
Keyword(s):  
Meta Analysis ◽  
Future Research ◽  
Accounting Standard ◽  
Accounting Data ◽  
Accounting Research ◽  
Units Of Analysis ◽  
Qualitative Descriptive ◽  
The Moment ◽  
The Relationship ◽  
Descriptive Models

The purpose of this study is to describe the development of market based accounting research (MBAR) published in Indonesia for 10 years. This study attempts to explain the topics of MBAR, research method used, the variables, between-variable relationship formed, and the units analysis used in MBAR. This research uses qualitative-descriptive method to create descriptive models of MBAR articles published in accounting journals that have been accredited with minimum grade of B. The analysis of 109 MBAR articles of five accounting journals shows that 10 MBAR themes are still potential. Among three methods in MBAR, the multivariate association study is dominant. Some papers use intervening and moderating model to explore the relationship between accounting data and capital market reaction. The results for each theme are described in a research map that shows the relationship between variables (constructs) of MBAR from three units of analysis. This paper finds some implications to MBAR research agenda in the future, especially for meta-analysis research and triangulation research, due to many inconsistencies of the MBAR findings in Indonesia. In addition, accounting standard research topic is still promising in the moment of accounting standards transition.

scholarly journals 100% Fruit juice intake and cardiovascular risk: a systematic review and meta-analysis of prospective and randomised controlled studies

2020 ◽  
Author(s):  
Lanfranco D’Elia ◽  
◽  
Monica Dinu ◽  
Francesco Sofi ◽  
Massimo Volpe ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Cardiovascular Risk ◽  
Dose Response ◽  
Prospective Studies ◽  
Fruit Juice ◽  
Meta Analysis ◽  
Inverse Association ◽  
Non Linear ◽  
Randomised Controlled ◽  
The Relationship

Abstract Purpose The relationship between 100% fruit juice (100%FJ) consumption and cardiovascular risk is object of debate: indeed, recently published investigations provided new but discrepant evidence on this important question and International dietary guidelines are not in agreement on recommendations about fruit juice consumption. Therefore, we performed a meta-analysis of the prospective studies and the randomised controlled trials (RCTs) that explored the relationship between 100%FJ intake, cardiovascular risk profile and risk of cardiovascular events. Methods We performed a systematic search of publications up to August 2019. Summary relative risks and exploration of linearity of the association were estimated for prospective studies and summary mean differences (MDs) calculated for RCTs. Results A total of 21 prospective studies and 35 RCTs met the inclusion criteria. Dose–response analysis detected a significant inverse association between low-moderate 100%FJ consumption and risk of stroke (up to 200 ml/day) or total CV events (up to 170 ml/day) compared with no consumption, with a non-linear relationship (p for non-linearity < 0.05). No significant association was found for coronary heart disease and diabetes risk. In RCTs, a favorable and significant effect of 100%FJ intake was detected on blood pressure (systolic, MD: − 3.14 mmHg; diastolic, MD: − 1.68 mmHg), arterial compliance (carotid-femoral pulse wave velocity, − 0.38 m/s) and endothelial function (flow-mediated dilation, 2.10%). Neutral effects were found on body weight, blood lipids and glucose metabolism. Conclusions The results of these analyses indicate that 100%FJ consumption is not associated with higher CV risk. A non-linear inverse dose–response relationship occurs between 100%FJ consumption and CV disease, in particular for risk of stroke, probably mediated by the decrease in blood pressure. Trial registration PROSPERO registration number (CRD42019135577).

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