scholarly journals Association Between Mechanical, Physiological, and Technical Parameters With Canoe Slalom Performance: A Systematic Review

2021 ◽  
Vol 12 ◽  
Author(s):  
Leonardo Henrique Dalcheco Messias ◽  
Ivan Gustavo Masselli Dos Reis ◽  
Viktor Bielik ◽  
Ana Luíza Paula Garbuio ◽  
Claudio Alexandre Gobatto ◽  
...  
Keyword(s):  
Total Sample ◽  
Physiological Data ◽  
Published Data ◽  
Relevant Parameter ◽  
Male Athletes ◽  
External Reviewer ◽  
Race Time ◽  
Technical Parameters ◽  
Force Development ◽  
Meta Analyses

This study aimed to systematically review studies that evaluated and compared mechanical, physiological, and technical parameters with the performance of slalom athletes. PubMed, SPORTDiscuss, and Scopus databases were searched until September 10, 2021, with no restriction of published data. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses guided the study's screening and quality assessment performed by an external reviewer using a 16-checklist item. A search of the databases identified 125 studies, but only eight were eligible, including a total sample of 117 male athletes. Four reports only associated mechanical or technical parameters with the performance of the paddler. Concerning the remaining studies, only one correlated physiological data, and the others associated more than one parameter with race time. Most of the eligible reports presented significant associations between mechanical/physiological components and slalom performance. Eligible studies support that high-force development during a slalom race is a relevant parameter for performance. Aerobic metabolism is highly required during slalom tasks and is inversely associated with race time, although it may not increase the chances of winning medals. Few reports have associated canoe slalom performance with technical components, and further research should focus on this matter.

scholarly journals Relationship between hospital or surgeon volume and outcomes in joint arthroplasty: protocol for a suite of systematic reviews and dose–response meta-analyses

BMJ Open ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. e022797 ◽  
Author(s):  
Xiang-Dong Wu ◽  
Meng-Meng Liu ◽  
Ya-Ying Sun ◽  
Zhi-Hu Zhao ◽  
Quan Zhou ◽  
...  
Keyword(s):  
Systematic Reviews ◽  
Dose Response ◽  
Data Extraction ◽  
Meta Analysis ◽  
High Volume ◽  
Joint Arthroplasty ◽  
Surgeon Volume ◽  
Published Data ◽  
Records Management ◽  
Meta Analyses

IntroductionJoint arthroplasty is a particularly complex orthopaedic surgical procedure performed on joints, including the hip, knee, shoulder, ankle, elbow, wrist and even digit joints. Increasing evidence from volume–outcomes research supports the finding that patients undergoing joint arthroplasty in high-volume hospitals or by high-volume surgeons achieve better outcomes, and minimum case load requirements have been established in some areas. However, the relationships between hospital/surgeon volume and outcomes in patients undergoing arthroplasty are not fully understood. Furthermore, whether elective arthroplasty should be restricted to high-volume hospitals or surgeons remains in dispute, and little is known regarding where the thresholds should be set for different types of joint arthroplasties.Methods and analysesThis is a protocol for a suite of systematic reviews and dose–response meta-analyses, which will be amended and updated in conjunction with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Protocols. Electronic databases, including PubMed and Embase, will be searched for observational studies examining the relationship between the hospital or surgeon volume and clinical outcomes in adult patients undergoing primary or revision of joint arthroplasty. We will use records management software for study selection and a predefined standardised file for data extraction and management. Quality will be assessed using the Newcastle-Ottawa Scale, and the meta-analysis, subgroup analysis and sensitivity analysis will be performed using Stata statistical software. Once the volume–outcome relationships are established, we will examine the potential non-linear relationships between hospital/surgeon volume and outcomes and detect whether thresholds or turning points exist.Ethics and disseminationEthical approval is not required, because these studies are based on aggregated published data. The results of this suite of systematic reviews and meta-analyses will be submitted to peer-reviewed journals for publication.PROSPERO registration numberCRD42017056639.

scholarly journals Efficacy of perioperative immunonutrition in visceral surgery: an umbrella review protocol

BMJ Open ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. e053851
Author(s):  
Karem Slim ◽  
Flora Badon ◽  
Charles-Hervé Vacheron ◽  
Chadli Dziri ◽  
Thomas Marquillier
Keyword(s):  
Systematic Reviews ◽  
Surgical Site Infections ◽  
Visceral Surgery ◽  
Hospital Length Of Stay ◽  
Bibliographic Databases ◽  
Measurement Tool ◽  
Published Data ◽  
Umbrella Review ◽  
Meta Analyses

IntroductionImmunonutrition (IN) is generally used before major visceral surgery with the intent to reduce postoperative complications, especially infectious ones. However, the conclusions of published meta-analyses are conflicting. The purpose of this review is to synthesise the data of published systematic reviews on the effectiveness of IN.Methods and analysisThis protocol follows the Preferred Reporting Items for Systematic Reviews and Meta-analyses Protocols guidelines. This is an umbrella review of systematic reviews comparing IN (delivered orally 5–7 days preoperatively) with normal diet or isocaloric isonitrogenous feeding before visceral surgery performed on any of several viscera (colorectum, stomach, pancreas, liver, oesophagus). We search the systematic reviews included in the main bibliographic databases. To assess the efficacy of IN, several outcomes will be considered: the main outcome is infectious complications (surgical site infections, pulmonary infections or urinary infections) and secondary outcomes are overall morbidity, hospital length of stay and mortality. Identified reviews will be screened by two independent assessors. The methodological quality of relevant included reviews will be assessed using A MeaSurement Tool to Assess systematic Reviews (AMSTAR) instrument. The data extracted from included reviews will be synthesised using the r-Metafor package considering separate groups according to the viscus of interest. Publication bias will be evaluated, and subgroup analyses will be performed according to the quality of studies and preoperative nutritional status.Ethics and disseminationAn umbrella review based on published data from systematic reviews needs no ethical approval. Furthermore, no patient will be involved in the review. Once terminated, the review will be submitted for publication in an open access journal to ensure wide dissemination of the findings.PROSPERO registration numberCRD42021255177.

scholarly journals Insights into Supplements with Tribulus Terrestris used by Athletes

2014 ◽  
Vol 41 (1) ◽  
pp. 99-105 ◽  
Author(s):  
Andrzej Pokrywka ◽  
Zbigniew Obmiński ◽  
Jadwiga Malczewska-Lenczowska ◽  
Zbigniew Fijatek ◽  
Ewa Turek-Lepa ◽  
...  
Keyword(s):  
Scientific Literature ◽  
Pharmacological Action ◽  
Accidental Poisoning ◽  
Published Data ◽  
Tribulus Terrestris ◽  
Exotic Plant ◽  
Male Athletes ◽  
Over The Counter ◽  
Physically Active ◽  
Toxicological Studies

AbstractHerbal and nutritional supplements are more and more popular in the western population. One of them is an extract of an exotic plant, named Tribulus terrestris (TT). TT is a component of several supplements that are available over-the-counter and widely recommended, generally as enhancers of human vitality. TT is touted as a testosterone booster and remedy for impaired erectile function; therefore, it is targeted at physically active men, including male athletes. Based on the scientific literature describing the results of clinical trials, this review attempted to verify information on marketing TT with particular reference to the needs of athletes. It was found that there are few reliable data on the usefulness of TT in competitive sport. In humans, a TT extract used alone without additional components does not improve androgenic status or physical performance among athletes. The results of a few studies have showed that the combination of TT with other pharmacological components increases testosterone levels, but it was not discovered which components of the mixture contributed to that effect. TT contains several organic compounds including alkaloids and steroidal glycosides, of which pharmacological action in humans is not completely explained. One anti-doping study reported an incident with a TT supplement contaminated by a banned steroid. Toxicological studies regarding TT have been carried out on animals only, however, one accidental poisoning of a man was described. The Australian Institute of Sport does not recommend athletes’ usage of TT. So far, the published data concerning TT do not provide strong evidence for either usefulness or safe usage in sport.

Lack of Oncological Benefit from Bursectomy in Radical Gastrectomy: A Systematic Review

2021 ◽  
pp. 1-10
Author(s):  
Pankaj Kumar Garg ◽  
Ashish Jakhetiya ◽  
Kiran Kalyan Turaga ◽  
Rahul Kumar ◽  
Andreas Brandl ◽  
...  
Keyword(s):  
Overall Survival ◽  
Gastric Adenocarcinoma ◽  
Systematic Reviews ◽  
Disease Recurrence ◽  
Assessment Tools ◽  
Published Data ◽  
Radical Gastrectomy ◽  
Significant Difference ◽  
Omental Bursa ◽  
Meta Analyses

<b><i>Background:</i></b> Resection of the omental bursa has been suggested to reduce peritoneal recurrence and facilitate a complete oncological resection during a gastrectomy. The addition of this procedure increases technical complexity and prolongs the procedure. Published data regarding the oncological benefit of this procedure are conflicting. We hypothesized that a bursectomy during a radical gastrectomy does not improve overall survival. <b><i>Methods:</i></b> In accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) reporting guideline, a comprehensive literature search of 3 electronic databases (PubMed, Scopus, and Embase) was conducted to identify the clinical studies that compared bursectomy with no-bursectomy in radical gastrectomy for gastric adenocarcinoma. Qualitative and quantitative data synthesis was performed using RevMan software. A random-/fixed-effect modeling was used depending upon the heterogeneity. Bias and quality assessment tools were applied. The study was registered with the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42019116556). <b><i>Results:</i></b> Of 8 studies assessing the role of bursectomy in gastric adenocarcinoma, 6 (75%) were included – of which 2 (33%) are randomized controlled trials. Of 2,904 patients, 1,273 (%) underwent a bursectomy. There was no statistically significant difference in either overall survival (hazard ratio [HR] = 0.89, 95% CI 0.75–1.06, <i>I</i><sup>2</sup> = 14%) or disease recurrence (HR = 1.01, 95% CI 0.84–1.20, <i>I</i><sup>2</sup> = 22%) in the bursectomy group compared to the no-bursectomy group. <b><i>Conclusion:</i></b> There is no additional oncological benefit of adding bursectomy to radical gastrectomy in all patients with gastric adenocarcinoma.

scholarly journals Composición e invarianza factorial de la versión en español del Cuestionario de Clima en el Deporte (S-SCQ) en universitarios deportistas de Chihuahua, México

2020 ◽  
Vol 20 (2) ◽  
pp. 218-228
Author(s):  
Humberto Blanco Vega ◽  
Ana Citlalli Díaz Leal ◽  
Santiago Guijarro Romero ◽  
Luis Humberto Blanco Ornelas ◽  
Susana Ivonne Aguirre Vásquez ◽  
...  
Keyword(s):  
Factor Structure ◽  
Reliability And Validity ◽  
Total Sample ◽  
The Other ◽  
Factorial Structure ◽  
Male Athletes ◽  
Confirmatory Factor ◽  
Perception Of Support ◽  
The One ◽  
University Athletes

El presente estudio analiza las propiedades psicométricas propuestas por Balaguer, Castillo, Duda y Tomás (2009) para la versión en español del Cuestionario de Clima en el Deporte (S-SCQ) en hombres y mujeres deportistas universitarios. La muestra total fue de 432 universitarios deportistas de Chihuahua, México, 169 mujeres y 263 hombres, con edades comprendidas entre 18-26 años (M = 20.40; DE = 1.89). La estructura factorial del cuestionario se analizó mediante análisis factoriales confirmatorios. Los análisis, muestran que una estructura unifactorial es viable y adecuada tanto para la muestra total como para las poblaciones de hombres y mujeres. La estructura de un solo factor, atendiendo a criterios estadísticos y sustantivos, ha mostrado adecuados indicadores de ajuste de fiabilidad y validez. Además, la estructura factorial, las cargas factoriales y los interceptos se consideran invariantes de acuerdo al género; sin embargo, se encontraron diferencias a favor de los hombres deportistas en cuanto a su percepción sobre el apoyo a su autonomía por parte de su entrenador o entrenadora. The aim of this research was to analyze the psychometric properties proposed by Balaguer et al. (2009) for the spanish version of Sport Climate Questionnaire (S-SCQ) in university athletes mens and women. The total sample has been composed by 432 university athletes, 169 women and 263 mens from Chihuahua, Mexico, with ages from 18-26 years (M = 20.40, SD = 1.89). The factor structure of questionnaire has been analized through the confirmatory factor analysis. This analysis shows that a onefactorial structure is viable and adequate for the total sample and the populations of mens and woman. The one factor structure, according to statistical and substantive criteria, has shown adequate indicators of reliability and validity adjustment. On the other hand, the factorial structure, the factorial loads and the intercepts are considered invariant according to the variable gender; however, differences were found in favor of male athletes in terms of their perception of support for their autonomy on the part of their coaches. O presente estudo analisa as propiedades psicométricas propostas por Balaguer et al. (2009) para a versão espanhola do Sports Climate Questionnaire (S-SCQ). Amostra total foi de 432 universitários atletas de Chihuahua, México, 169 mulheres e 263 homens com idades entre 18-26 anos (M = 20.40; DE = 1.89). A estrutura fatorial foi analisado com anàlises fatorial confirmatòrias. Os analises mostran que uma estrutura unifatorial  e factível e adequado para a mostra total e para ambas as populações, homens e mulheres. A estrutura unifatorial, em resposta a criterios estatísticos e materiais tem mostrado indicadores de ajuste adequados de confiabilidade e validade. Além disso a estrutura de fatores, cargas fatoriais e intercepto são considerados invariantes de acordó com o gênero; porém, se encontraram diferenças no grupo de homens atletas em seu percepção de apoiar a seu aotonomia respeito a seu treinador.

scholarly journals Who needs a stapling device for haemorrhoidectomy, if one has the radiofrequency device?

2019 ◽  
Vol 42 (1) ◽  
pp. 24-29
Author(s):  
A. Sunny ◽  
H. Sellars ◽  
G. Ramsay ◽  
R. Polson ◽  
A. J. M. Watson
Keyword(s):  
Outcome Data ◽  
Primary Data ◽  
Anal Stenosis ◽  
Published Data ◽  
Significant Heterogeneity ◽  
Radiofrequency Energy ◽  
Stapling Device ◽  
Vessel Sealing ◽  
Sh Group ◽  
Meta Analyses

Abstract Background Multiple operations exist to treat haemorrhoids. Although comparisons of conventional excision and other techniques have been performed, there are less comparative outcome data available for stapled haemorrhoidopexy (SH) and radiofrequency haemorrhoidectomy (RFH). Use of a radiofrequency energy device for haemorrhoidectomy is an alternative to standard diathermy, scissors or scalpel. It provides vessel sealing between the jaws of the instrument and aims to minimise wider tissue damage. Objective To systematically review the literature comparing SH and RFH, assessing complications, outcomes, patient experience and costs. Methods A tailored search of medical databases identified literature containing relevant primary and secondary data comparing SH and RFH. Papers were screened for relevance and completeness of published data. Those missing methodological information, outcome data or statistical analysis were subsequently excluded. A narrative review was then performed. Results The primary data in this review originate from six randomised control trials (RCTs) and five meta-analyses. Evidence was conflicting, with a trend towards more early postoperative pain in the RFH vs. the SH group (three RCTs reported increased early pain scores in the RFH group). Significantly higher rates of residual and recurrent haemorrhoids and prolapse in the SH group were observed in two RCTs and four meta-analyses. Bleeding, urinary retention, incontinence and anal stenosis did not significantly differ. No detailed contemporary cost analysis was found. Conclusion The trials are small, with significant heterogeneity in the techniques used and outcome data recorded. However, despite the limited available evidence, RFH appears superior to SH due to significantly lower rates of residual and recurrent haemorrhoids and prolapse.

Simultaneous compared to interval administration of mifepristone and misoprostol for medical abortion up to 10+0 weeks' gestation: a systematic review with meta-analyses

2020 ◽  
pp. bmjsrh-2019-200448
Author(s):  
Mia Schmidt-Hansen ◽  
Jonathan Lord ◽  
Elise Hasler ◽  
Sharon Cameron
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Cochrane Collaboration ◽  
Medical Abortion ◽  
Cochrane Library ◽  
Published Data ◽  
Study Results ◽  
Randomised Controlled ◽  
Meta Analyses

BackgroundMedical abortion with mifepristone and misoprostol usually involves an interval of 36–48 hours between administering these drugs; however, it is possible that the clinical efficacy at early gestations may be maintained when the drugs are taken simultaneously. The objective of this systematic review was to determine the safety and effectiveness of simultaneous compared with interval administration of mifepristone and misoprostol for abortion up to 10+0 weeks’ gestation.MethodsWe searched Embase Classic, Embase; Ovid MEDLINE(R) including Daily, and Epub Ahead-of-Print, In-Process & Other Non-Indexed Citations; and Cochrane Library on 11 December 2019. We included randomised controlled trials (RCTs), published in English from 1985, comparing simultaneous to interval administration of mifepristone and misoprostol for early abortion. Risk of bias was assessed using the Cochrane Collaboration checklist for RCTs. Meta-analysis of risk ratios (RRs) using the Mantel-Haenszel method were performed. The quality of the evidence was assessed using GRADE.ResultsMeta-analyses of three RCTs (n=1280) showed no differences in ‘ongoing pregnancy’ (RR 1.78, 95% CI 0.38 to 8.36), ‘haemorrhage requiring transfusion or ≥500 mL blood loss’ (RR 0.11, 95% CI 0.01 to 2.03) and ‘incomplete abortion with the need for surgical intervention’ (RR 1.30, 95% CI 0.76 to 2.25) between the interventions. Individual study results showed no difference in patient satisfaction, or ‘need for repeat misoprostol’, although ‘time to onset of bleeding or cramping’ was longer after simultaneous than interval administration. The quality of evidence was very low to moderate.ConclusionThe published data support the use of simultaneous mifepristone and misoprostol for medical abortion up to 9+0 weeks in women who prefer this method of administration.

The diagnostic value of 11C-methionine PET in hyperparathyroidism with negative 99mTc-MIBI SPECT: a meta-analysis

2016 ◽  
Vol 58 (5) ◽  
pp. 558-564 ◽  
Author(s):  
Leilei Yuan ◽  
Jun Liu ◽  
Ying Kan ◽  
Jigang Yang ◽  
Xufu Wang
Keyword(s):  
Sensitivity And Specificity ◽  
Meta Analysis ◽  
False Negative ◽  
Total Sample ◽  
Diagnostic Value ◽  
Published Data ◽  
Diagnostic Modality ◽  
Positron Emission ◽  
99Mtc Mibi ◽  
Mibi Spect

Background 99mTc-sestamibi (MIBI) parathyroid SPECT is generally regarded as the best preoperative localizing method in patients with hyperparathyroidism (HPT). However, 99mTc-MIBI SPECT is false negative in approximately 25% of adenomas. 11C-methionine positron emission tomography (PET) has been used in HPT with negative 99mTc-MIBI SPECT scan results. Purpose To systematically review and conduct a meta-analysis of published data on the performance of 11C-methionine PET in patients with HPT with negative 99mTc-MIBI SPECT. Material and Methods A comprehensive review of the literature was performed. Pooled sensitivity and specificity of 11C-methionine PET in patients with HPT and a negative 99mTc-MIBI SPECT was calculated on a per-patient basis using receiver-operating characteristic (ROC) methodology. Results Nine studies that met all inclusion and exclusion criteria were included into our meta-analysis, comprising a total sample size of 137 patients. Pooled sensitivity and specificity of 11C-methionine PET in patients with HPT with negative or inconclusive 99mTc-MIBI SPECT scans was 86% and 86%, respectively. The area under the ROC curve was 0.87. Conclusion By merit of the high overall sensitivity, specificity, and accuracy, 11C-methionine PET can potentially complement the diagnostic workup of patients with HPT and negative or inconclusive 99mTc-MIBI SPECT. 11C-methionine PET appears to be a promising diagnostic modality in complicated cases with HPT.

scholarly journals Global, regional and national estimates ofToxoplasma gondiiseroprevalence in pregnant women: a protocol for a systematic review and modelling analysis

BMJ Open ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. e030472 ◽  
Author(s):  
Jean Joel Bigna ◽  
Joel Noutakdie Tochie ◽  
Dahlia Noelle Tounouga ◽  
Anne Olive Bekolo ◽  
Nadia S Ymele ◽  
...  
Keyword(s):  
Public Health ◽  
Toxoplasma Gondii ◽  
Pregnant Women ◽  
Data Extraction ◽  
Meta Analysis ◽  
Empirical Studies ◽  
Published Data ◽  
Representative Study ◽  
Nationally Representative ◽  
Meta Analyses

IntroductionTo set priorities for public health policy, funding for public health interventions, and healthcare planning which will ultimately contribute in bending the burden of toxoplasmosis towards maternal and neonatal health, it is necessary to have accurate data on the prevalence of toxoplasmosis in pregnancy. Therefore, we aimed to estimate the seroprevalence ofToxoplasma gondiiinfection in pregnant women by countries, WHO regions and globally.Methods and analysisWe will search multiple databases to identify studies that reported the prevalence (or enough data to compute this estimate) ofToxoplasma gondiiin the global population of pregnant women up till December 31, 2018 without any language restrictions. Study selection, data extraction and risk of bias assessment will be conducted independently by three pairs of investigators. For each country, we will estimate the prevalence based on empirical studies if there is either one nationally representative study, or two or more not nationally representative studies. Then, we will perform a country-specific random-effects meta-analyses. The heterogeneity will be evaluated using the χ² test on Cochrane’s Q statistic and quantified with H and I² statistics. For countries with one or no empirical studies or where the meta-analysis will result in a wide CI of 0%–100%, we will predict the country’s prevalence by using a Bayesian generalised non-linear multilevel model. The model will have a hierarchical structure in which estimates for each country will be informed by its own data, if available, or by data from other countries in the same WHO region.Ethics and disseminationSince this study will be based on published data, it does not require any ethical approval. Its findings will be published in a scientific peer-reviewed journal. They will also be presented at scientific conferences and to relevant public health sectors.PROSPERO registration numberCRD42019125572.

Underutilization of Meta-analysis in Diagnostic Pathology

2015 ◽  
Vol 139 (10) ◽  
pp. 1302-1307 ◽  
Author(s):  
Michael Kinzler ◽  
Lanjing Zhang
Keyword(s):  
Meta Analysis ◽  
Citation Count ◽  
Research Articles ◽  
Published Data ◽  
Original Research ◽  
Diagnostic Pathology ◽  
Review Articles ◽  
The Mean ◽  
Meta Analyses

Context No studies to our knowledge have investigated citations and utilization of meta-analysis in diagnostic pathology (DP). Objective To characterize meta-analyses in DP compared with meta-analyses in medicine. Design We searched PubMed for meta-analyses in 12 major DP journals without specifying years and in 4 major medicine journals in both 2006 and 2011. We compared articles' adjusted citation ratios (ACRs), defined as an article's citation count divided by the mean citations for the meta-analysis, review, and original research articles published in the same journal in the same year. Results Forty-one of 76 DP articles, 74 of 125 medicine articles in 2011, and 52 of 83 medicine articles in 2006 were qualified meta-analyses as identified by PubMed. The ACRs of DP meta-analysis articles were higher than those of original research articles (2.62 ± 2.31 versus 0.92 ± 0.84, P &lt; .001) and similar to those of review articles in 2006 (2.62 ± 2.31 versus 1.95 ± 1.59, P = .50), but they were similar to both in 2011 (1.85 ± 1.39 versus 0.99 ± 1.43, P = .11; 1.85 ± 1.39 versus 1.12 ± 1.43, P = .21, respectively). Diagnostic pathology and medicine meta-analyses had similar ACRs (1.85 ± 1.39 versus 1.57 ± 1.35 in 2011, P = .60; and 2.62 ± 2.31 versus 1.85 ± 1.90 in 2006, P = .50, respectively). However, although DP journals published fewer meta-analyses (0.97% versus 6.66% in 2011 and 0.67% versus 4.40% in 2006, P &lt; .001 for both), they published more meta-analyses using both original and published data than medicine (21.95% versus 1.59%, P &lt; .001). They also published more meta-analyses per year in 2011–2014 than in 2000–2010 (6.4 ± 1.29 versus 1.36 ± 1.03 articles per year, P &lt; .001). Conclusions We found underutilization of meta-analyses in DP, despite their high ACRs and recently increased utilization. More DP meta-analyses are needed.

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