scholarly journals The effects of interval training on peripheral brain derived neurotrophic factor (BDNF) in young adults: a systematic review and meta-analysis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Patricia Concepción García-Suárez ◽  
Iván Rentería ◽  
Eric P. Plaisance ◽  
José Moncada-Jiménez ◽  
Alberto Jiménez-Maldonado
Keyword(s):  
Young Adults ◽  
Meta Analysis ◽  
Interval Training ◽  
Acute Effect ◽  
Effect Sizes ◽  
Significant Heterogeneity ◽  
Moderate Increase ◽  
Young Population ◽  
Chronic Effect

AbstractThe aim of the current meta-analysis was to determine the effects of acute and chronic interval training (IT) on serum and plasma BDNF concentrations in healthy young adults. A literature search was performed using six databases until February 2020. The TESTEX scale was used to assess the quality of studies. Effect sizes (ES) were computed and two-tailed α values < 0.05 and non-overlapping 95% confidence intervals (95% CI) were considered statistically significant. Heterogeneity, inconsistency (I2), and small-study effects using the Luis Furuya–Kanamori (LFK) index were examined. Fifteen studies (n = 277 participants, age = 24 ± 3 years) were included. The overall effects of IT on circulating BDNF concentrations were moderate and significant (ES = 0.62, 95% CI 0.00, 1.24, heterogeneous (p < 0.001), highly inconsistent (I2 = 90%), and with major asymmetry (LFK index = 2.76). The acute effect of IT on peripheral BDNF levels was large and significant (ES = 1.10, 95% CI 0.07, 2.14), heterogeneous (p < 0.001), highly inconsistent (I2 = 92%), and with major asymmetry (LFK index = 3.34). The chronic effect of IT on circulating BDNF was large and significant (ES = 0.93, 95% CI 0.40, 1.46), heterogeneous (p < 0.001), with moderate inconsistency (I2 = 70%), and minor asymmetry (LFK index = 1.21). Acute and chronic IT elicited a moderate increase in serum and plasma BDNF concentrations in a healthy young population.

scholarly journals The Effects of Interval Training on Peripheral Brain Derived Neurotrophic Factor (BDNF) In Young Adults: A Systematic Review and Meta-Analysis

2020 ◽  
Author(s):  
Patricia García-Suárez ◽  
Iván Rentería ◽  
Eric Plaisance ◽  
José Moncada-Jiménez ◽  
Alberto Jiménez-Maldonado
Keyword(s):  
Young Adults ◽  
Meta Analysis ◽  
Interval Training ◽  
Acute Effect ◽  
Effect Sizes ◽  
Significant Heterogeneity ◽  
Moderate Increase ◽  
Young Population ◽  
Chronic Effect

Abstract The aim of the current meta-analysis was to determine the effects of acute and chronic interval training (IT) on peripheral BDNF concentrations in healthy young adults. A literature search was performed using six databases until February 2020. The TESTEX scale was used to assess the quality of studies. Effect sizes (ES) were computed and two-tailed α values <0 .05 and non-overlapping 95% confidence intervals (95% CI) were considered statistically significant. Heterogeneity, inconsistency (I2), and small-study effects using the Luis Furuya-Kanamori (LFK) index were examined. Fifteen studies (n=277 participants, age =24±3 yr.) were included. The overall effects of IT on circulating BDNF concentrations were moderate and non-significant (ES =0.64, 95%CI = -0.01, 1.30, heterogeneous (p<0.001), highly inconsistent (I2=90%), and with major asymmetry (LFK index =2.85). The acute effect of IT on peripheral BDNF levels was large and significant (ES =1.22, 95%CI =0.08), homogenous (p<0.001), with considerable inconsistency (I2=93%), and major asymmetry (LFK index =3.34). The chronic effect of IT on circulating BDNF was large and significant (ES =0.93, 95%CI =0.40), homogenous (p<0.001), with moderate inconsistency (I2=70%), and minor asymmetry (LFK index =1.21). Acute and chronic IT, elicited a moderate increase in peripheral BDNF concentrations in a healthy young population.

scholarly journals Quality of Caregiving in Mothers With Illicit Substance Use: A Systematic Review and Meta-analysis

2017 ◽  
Vol 11 ◽  
pp. 117822181769403 ◽  
Author(s):  
Denise Hatzis ◽  
Sharon Dawe ◽  
Paul Harnett ◽  
Jane Barlow
Keyword(s):  
Meta Analysis ◽  
Maternal Sensitivity ◽  
Research Synthesis ◽  
Effect Sizes ◽  
Significant Heterogeneity ◽  
Observational Methodology ◽  
Illicit Substance Use ◽  
Subgroup Analyses ◽  
Sample Characteristics

Background: The quality of caregiving in mothers with substance abuse problems appears to be compromised. However, divergent findings, methodological variability, and sample characteristics point to the need for research synthesis. Methods: A comprehensive systematic search was undertaken. Studies were eligible if they (1) compared substance-misusing mothers with non–substance-misusing mothers, (2) involved children from birth to 3 years, and (3) maternal sensitivity and child responsiveness were measured using observational methodology. Results: A global meta-analysis for maternal sensitivity (n = 24 studies) and child responsiveness (n = 16 studies) on 3433 mother-infant dyads yielded significant population effect sizes and significant heterogeneity. Subgroup analyses found reduced heterogeneity when the meta-analysis was conducted on studies where groups were matched on key demographic characteristics; although the effect size was small, it was still significant for maternal sensitivity but not child responsiveness. Conclusions: Compromised quality of caregiving is found in high-risk, substance-misusing mothers, emphasising the importance of early intervention that draws from attachment-based interventions.

Quality of life in adolescents and young adults with CHD is not reduced: a systematic review and meta-analysis

2015 ◽  
Vol 26 (3) ◽  
pp. 415-425 ◽  
Author(s):  
Morten Schrøder ◽  
Kirsten A. Boisen ◽  
Jesper Reimers ◽  
Grete Teilmann ◽  
Jesper Brok
Keyword(s):  
Quality Of Life ◽  
Systematic Review ◽  
Young Adults ◽  
Meta Analysis ◽  
Adolescents And Young Adults ◽  
Analysis Model ◽  
Significant Difference ◽  
Newcastle Ottawa Scale ◽  
First Time

AbstractPurposeWe performed a systematic review and meta-analysis of observational studies assessing quality of life in adolescents and young adults born with CHD compared with age-matched controls.MethodsWe carried out a systematic search of the literature published in Medline, Embase, PsychINFO, and the Cochrane Library’s Database (1990–2013); two authors independently extracted data from the included studies. We used the Newcastle–Ottawa scale for quality assessment of studies. A random effects meta-analysis model was used. Heterogeneity was assessed using the I2-test.ResultsWe included 18 studies with 1786 patients. The studies were of acceptable-to-good quality. The meta-analysis of six studies on quality of life showed no significant difference – mean difference: −1.31; 95% confidence intervals: −6.51 to +3.89, I2=90.9% – between adolescents and young adults with CHD and controls. Similar results were found in 10 studies not eligible for the meta-analysis. In subdomains, it seems that patients had reduced physical quality of life; however, social functioning was comparable or better compared with controls.ConclusionFor the first time in a meta-analysis, we have shown that quality of life in adolescents and young adults with CHD is not reduced when compared with age-matched controls.

Abstract P223: Larger Effect Sizes of Established BMI Genetic Variants During Adolescence, a Vulnerable Period of Weight Gain

Circulation ◽  
2012 ◽  
Vol 125 (suppl_10) ◽  
Author(s):  
Mariaelisa Graff ◽  
Kari E North ◽  
Karen L Mohlke ◽  
Leslie A Lange ◽  
Ethan M Lange ◽  
...  
Keyword(s):  
Weight Gain ◽  
Ethnic Groups ◽  
Meta Analysis ◽  
Add Health ◽  
Effect Sizes ◽  
Significant Heterogeneity ◽  
Genome Wide Association Studies ◽  
Call Rate ◽  
Middle Aged ◽  
Vulnerable Period

In the past five years genome-wide association studies (GWAS) have identified common genetic loci associated with body mass index (BMI) mainly in European middle-aged adult populations. The influence of these loci in adolescence, a period of risk for weight gain, and whether there are different associations across adolescent groups at highest risk (e.g., ethnic minority populations), remains largely unknown. We examined whether obesity susceptibility loci identified from previous GWAS in adults were associated with BMI in an ethnically diverse adolescent cohort. Using 8918 participants from the National Longitudinal Study of Adolescent Health, or Add Health (aged 12-21 years in 1996, 52.6 % female), we assessed the association of 43 SNPs, selected based on statistical significance in previous GWAS, with BMI across four ethnic US subpopulations (5,296 European Americans, EA, 1,815 African Americans, AfA, 1,356 Hispanic Americans, HA, and 451 Asian Americans, AsA). Buccal cells from participants were extracted and genotyped using TaqMan (sample call rate: 97.5%, SNP call rate: 100%). Inverse normal transformed BMI residuals, adjusted for gender and age, were used in ethnicity-stratified models with SNPs in PLINK, assuming an additive model. An inverse-variance-weighted meta-analysis was used to combine results across the 4 ethnic groups. Average BMI across all ethnic groups was 23.6±5.2 kg/m2, ranging from 22.6±5.2 kg/m2 in AsA to 24.3±5.8 kg/m2 in AfA. The effect estimates for all 43 SNPs were directionally consistent across ethnicity with previously published results. Of the 43 SNPs, 20 were associated with BMI at p<0.05 in the meta-analysis (17 in EA, 7 in AfA, 4 in HA, and 5 in AsA). Based on t-test comparisons, 16 of the 20 SNPs had larger and 2 loci had smaller effect sizes (p<0.05) in the Add Health adolescent sample than published effect sizes for BMI in adults. Only FTO (rs9939609) showed significant heterogeneity across ethnicity (p=0.01 for I2=73.5). TMEM18 (rs6548238, meta-analysis p-value p=1.32E-10), had one of the largest differences in effect size compared to middle-aged European adults (Willer et al 2009) with a per allele increase of 0.70±0.11 kg/m2 in this sample versus 0.26±0.07 kg/m2 in adults (beta[SE] difference = 0.44[0.08]; p=1.4E-08). Variants associated with BMI in adults were also associated with BMI in adolescents, with some comparatively larger effects during this vulnerable period. R01HD057194

scholarly journals Minor Physical Anomalies in Bipolar Disorder—A Meta-Analysis

2021 ◽  
Vol 12 ◽  
Author(s):  
Eszter Varga ◽  
András Hajnal ◽  
Alexandra Soós ◽  
Péter Hegyi ◽  
Dóra Kovács ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Meta Analysis ◽  
Bipolar Disorders ◽  
Effect Sizes ◽  
Inclusion Criteria ◽  
Weighted Mean ◽  
Quality Of Evidence ◽  
Minor Physical Anomalies ◽  
The Brain

Introduction: Minor physical anomalies (MPAs) may reflect basic neurobiological features underlying bipolar disorders (BPD), as they are sensitive physical indicators of morphogenetic failure of the brain. Despite several researches about the presence of MPAs in BPD, the results are still controversial.Objectives: The aim of the present meta-analysis was to assess the standardized weighted mean effect sizes of MPAs in BPD and to examine if MPAs may be found predominantly in the head and/or facial regions in BPD patients compared to controls (HC).Methods: Four studies, involving 155 patients with BPD, and 187 HC, were involved in the analysis after searching the literature. For the investigation of MPAs in the peripheral (MPA-P) and in the head and facial regions (MPA-CF), two studies involving 121 BPD patients, and 133 HC passed the inclusion criteria.Results: The number of the MPAs in the BPD group was significantly higher compared to HC. Another important finding of the present study is that BPD patients' MPA-P scores do not significantly differ from those of the HC. In contrast, BPD patients' MPA-CF scores were found to be significantly higher compared to HC subjects. It is important to note that there was a low number of eligible publications included, which caused higher heterogeneity.Conclusions: Low quality of evidence suggests that MPAs are more common in patients with BPD than in HC and the higher rate of MPAs is found predominantly in the head and facial regions.

scholarly journals The Use of Green Coffee Extract as a Weight Loss Supplement: A Systematic Review and Meta-Analysis of Randomised Clinical Trials

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Igho Onakpoya ◽  
Rohini Terry ◽  
Edzard Ernst
Keyword(s):  
Weight Loss ◽  
Clinical Trials ◽  
Methodological Quality ◽  
Meta Analysis ◽  
Risk Of Bias ◽  
Significant Heterogeneity ◽  
Green Coffee ◽  
Significant Difference ◽  
Using Data

The purpose of this paper is to assess the efficacy of green coffee extract (GCE) as a weight loss supplement, using data from human clinical trials. Electronic and nonelectronic searches were conducted to identify relevant articles, with no restrictions in time or language. Two independent reviewers extracted the data and assessed the methodological quality of included studies. Five eligible trials were identified, and three of these were included. All studies were associated with a high risk of bias. The meta-analytic result reveals a significant difference in body weight in GCE compared with placebo (mean difference: kg; 95%CI: , ). The magnitude of the effect is moderate, and there is significant heterogeneity amongst the studies. It is concluded that the results from these trials are promising, but the studies are all of poor methodological quality. More rigorous trials are needed to assess the usefulness of GCE as a weight loss tool.

scholarly journals Systematic Review with Meta-Analysis: Endoscopic and Surgical Resection for Ampullary Lesions

2020 ◽  
Vol 9 (11) ◽  
pp. 3622
Author(s):  
Christian Heise ◽  
Einas Abou Ali ◽  
Dirk Hasenclever ◽  
Francesco Auriemma ◽  
Aiste Gulla ◽  
...  
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Significant Risk ◽  
Significant Heterogeneity ◽  
Incomplete Resection ◽  
Quality Of Data ◽  
Surgical Interventions ◽  
Random Effects Models ◽  
Fixed And Random Effects

Ampullary lesions (ALs) can be treated by endoscopic (EA) or surgical ampullectomy (SA) or pancreaticoduodenectomy (PD). However, EA carries significant risk of incomplete resection while surgical interventions can lead to substantial morbidity. We performed a systematic review and meta-analysis for R0, adverse-events (AEs) and recurrence between EA, SA and PD. Electronic databases were searched from 1990 to 2018. Outcomes were calculated as pooled means using fixed and random-effects models and the Freeman-Tukey-Double-Arcsine-Proportion-model. We identified 59 independent studies. The pooled R0 rate was 76.6% (71.8–81.4%, I2 = 91.38%) for EA, 96.4% (93.6–99.2%, I2 = 37.8%) for SA and 98.9% (98.0–99.7%, I2 = 0%) for PD. AEs were 24.7% (19.8–29.6%, I2 = 86.4%), 28.3% (19.0–37.7%, I2 = 76.8%) and 44.7% (37.9–51.4%, I2 = 0%), respectively. Recurrences were registered in 13.0% (10.2–15.6%, I2 = 91.3%), 9.4% (4.8–14%, I2 = 57.3%) and 14.2% (9.5–18.9%, I2 = 0%). Differences between proportions were significant in R0 for EA compared to SA (p = 0.007) and PD (p = 0.022). AEs were statistically different only between EA and PD (p = 0.049) and recurrence showed no significance for EA/SA or EA/PD. Our data indicate an increased rate of complete resection in surgical interventions accompanied with a higher risk of complications. However, studies showed various sources of bias, limited quality of data and a significant heterogeneity, particularly in EA studies.

scholarly journals A-17 Category Test performance in individuals with alcohol versus methamphetamine dependence

2019 ◽  
Vol 34 (6) ◽  
pp. 876-876
Author(s):  
A Walker ◽  
A Hauson ◽  
S Sarkissians ◽  
A Pollard ◽  
C Flora-Tostado ◽  
...  
Keyword(s):  
Effect Size ◽  
Test Performance ◽  
Neuropsychological Functioning ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Significant Heterogeneity ◽  
Category Test ◽  
Methamphetamine Dependence ◽  
Significant Difference ◽  
Axis I

Abstract Objective The Category Test (CT) has consistently been found to be sensitive at detecting the effects of alcohol on the brain. However, this test has not been as widely used in examining the effects of methamphetamine. The current meta-analysis compared effect sizes of studies that have examined performance on the CT in alcohol versus methamphetamine dependent participants. Data selection Three researchers independently searched nine databases (e.g., PsycINFO, Pubmed, ProceedingsFirst), extracted required data, and calculated effect sizes. Inclusion criteria identified studies that had (a) compared alcohol or methamphetamine dependent groups to healthy controls and (b) matched groups on either age, education, or IQ (at least 2 out of 3). Studies were excluded if participants were reported to have Axis I diagnoses (other than alcohol or methamphetamine dependence) or comorbidities known to impact neuropsychological functioning. Sixteen articles were coded and analyzed for the current study. Data synthesis Alcohol studies showed a large effect size (g = 0.745, p < 0.001) while methamphetamine studies evidenced a moderate effect size (g = 0.406, p = 0.001); both without statistically significant heterogeneity (I2 = 0). Subgroup analysis revealed a statistically significant difference between the effect sizes from alcohol versus methamphetamine studies (Q-between = 5.647, p = 0.017). Conclusions The CT is sensitive to the effects of both alcohol and methamphetamine and should be considered when examining dependent patients who might exhibit problem solving, concept formation, and set loss difficulties in everyday living.

Efficacy of Internet-Delivered Psychodynamic Therapy: Systematic Review and Meta-Analysis

2020 ◽  
Vol 48 (4) ◽  
pp. 437-454
Author(s):  
Tomas Lindegaard ◽  
Matilda Berg ◽  
Gerhard Andersson
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Psychodynamic Therapy ◽  
Significant Heterogeneity ◽  
Psychodynamic Treatment ◽  
Literature Searches ◽  
Treatment Models ◽  
Promising Treatment

Recent years have seen an increase of internet-delivered interventions based on psychodynamic treatment models. To test the efficacy of internet-delivered psychodynamic therapy (IPDT), we conducted a systematic review and meta-analysis of randomized controlled trials. Following literature searches, we identified seven studies meeting inclusion criteria. The total number of participants was 528 in the treatment group and 552 in the control conditions. We found small effects favoring IPDT compared to inactive control conditions for main outcomes (g = 0.44), depression (g = 0.46), anxiety (g = 0.20), and quality of life (g = 0.40). There was significant heterogeneity between studies for main outcomes and depression. Within-group effects ranged from Hedges's g = 0.32–0.99. The effects of IPDT were maintained or increased at follow-up. Study quality varied but was generally high. No indications of publication bias were found. In conclusion, IPDT is a promising treatment alternative, especially for depression, although the small number of studies limits the generalizability of the findings.

scholarly journals Comparative clinical trials in psychotherapy: Have large effects been replicated?

2020 ◽  
Vol 29 ◽  
Author(s):  
Nickolas D. Frost ◽  
Thomas W. Baskin ◽  
Bruce E. Wampold
Keyword(s):  
Clinical Trials ◽  
Treatment Efficacy ◽  
Literature Search ◽  
Meta Analysis ◽  
Effect Sizes ◽  
Depression And Anxiety ◽  
Inclusion Criteria ◽  
Average Quality ◽  
Meta Analyses

Abstract Aims The purpose of this review is to examine the replication attempts of psychotherapy clinical trials for depression and anxiety. We focus specifically on replications of trials that exhibit large differences between psychotherapies. The replicability of these trials is especially important for meta-analysis, where the inclusion of false-positive trials can lead to erroneous conclusions about treatment efficacy. Methods Standard replication criteria were developed to distinguish direct from conceptual replication methodologies. Next, an exhaustive literature search was conducted for published meta-analyses of psychotherapy comparisons. Trials that exhibited large effects (d > 0.8) were culled from these meta-analyses. For each trial, a cited replication was conducted to determine if the trial had been subsequently replicated by either ‘direct’ or ‘conceptual’ methods. Finally, a broader search was conducted to examine the extent of replication efforts in the psychotherapy literature overall. Results In the meta-analytic search, a total of N = 10 meta-analyses met the inclusion criteria. From these meta-analyses, N = 12 distinct trials exhibited large effect sizes. The meta-analyses containing more than two large effect trials reported evidence for treatment superiority. A cited replication search yielded no direct replication attempts (N = 0) for the trials with large effects, and N = 4 conceptual replication attempts of average or above average quality. However, of these four attempts, only two partially corroborated the results from their original trial. Conclusion Meta-analytic reviews are influenced by trials with large effects, and it is not uncommon for these reviews to contain several such trials. Since we find no evidence that trials with such large effects are directly replicable, treatment superiority conclusions from these reviews are highly questionable. To enhance the quality of clinical science, the development of authoritative replication criteria for clinical trials is needed. Moreover, quality benchmarks should be considered before trials are included in a meta-analysis, or replications are attempted.

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