Meta-Analysis, Meta-Regression, And Patient- And Trial- Level Data Subgroup Analysis: An Example Of Ecological Bias In A Meta-Analysis Of Prone Ventilation In Patients With Severe Hypoxemic Respiratory Failure Due To ALI/ARDS

2011 ◽  
Author(s):  
Sachin Sud ◽  
Jan Friedrich ◽  
Maneesh Sud ◽  
Neill Adhikari
Keyword(s):  
Respiratory Failure ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Hypoxemic Respiratory Failure ◽  
Ecological Bias ◽  
Level Data ◽  
Meta Regression

Systematic review and meta-analysis of Altruistic and Game-playing Love

2020 ◽  
Author(s):  
Hossein Dabiriyan Tehrani ◽  
Sara Yamini
Keyword(s):  
Systematic Review ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Game Playing ◽  
Love Styles ◽  
Collectivistic Culture ◽  
Meta Regression ◽  
Collectivistic Cultures ◽  
The Relationship

This systematic review aimed to find attitudes toward Altruistic and Game-playing love styles across individualistic and collectivistic cultures. Addressing major moderators concerning Altruistic and Game-playing love styles are the secondary objectives of this review. This review included 102 articles comprising samples from 37 countries (N = 41997). The findings of this meta-analysis show that there is a collectivistic and individualistic difference in Game-playing but not in the Altruistic love style. Collectivistic and individualistic cultures, on average, demonstrate the same perception concerning the Altruistic love style, whereas collectivistic culture shows the Game-playing love style more strongly. To explain the role of moderators in key measures, the subgroup analysis and meta-regression show that both Game-playing and Altruistic love styles decline by increasing the length of the relationship. Likewise, having children affects these love styles such that the Altruistic love style is improved, and the Game-playing love style is reduced by the presence of children in families.

Noninvasive ventilation in acute hypoxemic respiratory failure: A systematic review and meta-analysis. Response to letter

2019 ◽  
Vol 50 ◽  
pp. 310
Author(s):  
Paula G. David-João ◽  
Murilo H. Guedes ◽  
Alvaro Réa-Neto ◽  
Viviane B. de Oliveira Chaiben ◽  
Cristina P. Baena
Keyword(s):  
Systematic Review ◽  
Respiratory Failure ◽  
Noninvasive Ventilation ◽  
Meta Analysis ◽  
Hypoxemic Respiratory Failure ◽  
Acute Hypoxemic Respiratory Failure

Noninvasive ventilation in acute hypoxemic respiratory failure: A systematic review and meta-analysis

2019 ◽  
Vol 49 ◽  
pp. 84-91 ◽  
Author(s):  
Paula G. David-João ◽  
Murilo H. Guedes ◽  
Álvaro Réa-Neto ◽  
Viviane B. de Oliveira Chaiben ◽  
Cristina P. Baena
Keyword(s):  
Systematic Review ◽  
Respiratory Failure ◽  
Noninvasive Ventilation ◽  
Meta Analysis ◽  
Hypoxemic Respiratory Failure ◽  
Acute Hypoxemic Respiratory Failure

scholarly journals Prevalence of Workplace Physical Violence against Health Care Professionals by Patients and Visitors: A Systematic Review and Meta-Analysis

2020 ◽  
Vol 17 (1) ◽  
pp. 299 ◽  
Author(s):  
Yi-Lu Li ◽  
Rui-Qi Li ◽  
Dan Qiu ◽  
Shui-Yuan Xiao
Keyword(s):  
Health Care ◽  
Subgroup Analysis ◽  
Health Care Professionals ◽  
Physical Violence ◽  
Meta Analysis ◽  
Persistent Problem ◽  
Prevalence Studies ◽  
Prevalence Estimates ◽  
Meta Regression ◽  
One Year

Workplace physical violence against health care professionals perpetrated by patients and visitors has been a persistent problem worldwide. Prevalence estimates varied vastly across studies and there was a lack of quantitative syntheses of prevalence studies. This review aimed to quantify pooled one-year prevalence estimates at the global and regional levels. A systematic literature search was performed in the databases of PubMed, PsycINFO, Web of Science, and Embase between 1 January 2000 and 8 October 2018. Studies providing information about one-year prevalence of self-reported workplace physical violence against health care professionals perpetrated by patients or visitors were included. Heterogeneity between studies was evaluated using Cochran’s chi-squared test (Cochran’s Q) and I2 values. Subgroup analysis and meta-regression were used to explore heterogeneity. A total of 65 eligible studies reported one-year prevalence estimates for 61,800 health care professionals from 30 countries. The pooled one-year prevalence of workplace physical violence against health care professionals perpetrated by patients or visitors was 19.33% (95% confidence interval (CI): 16.49–22.53%) and the overall heterogeneity was high across studies. We noted geographic and staff categories variations for prevalence estimates through subgroup analysis. The meta-regression showed that sample size, type of health care setting, and quality score were significant moderators for heterogeneity. One in five health care professionals experienced workplace physical violence perpetrated by patients or visitors worldwide annually. Practical intervention was needed to ensure safety of health care professionals.

scholarly journals Preoxygenation before intubation in adult patients with acute hypoxemic respiratory failure: a network meta-analysis of randomized trials

Critical Care ◽  
2019 ◽  
Vol 23 (1) ◽  
Author(s):  
Ka Man Fong ◽  
Shek Yin Au ◽  
George Wing Yiu Ng
Keyword(s):  
Respiratory Failure ◽  
Data Extraction ◽  
Meta Analysis ◽  
Adult Patients ◽  
Cochrane Library ◽  
Controlled Trials ◽  
Hypoxemic Respiratory Failure ◽  
Acute Hypoxemic Respiratory Failure ◽  
Study Selection ◽  
Screening Study

Abstract Background Patients with acute hypoxemic respiratory failure are at risk for life-threatening complications during endotracheal intubation. Preoxygenation might help reduce the risk of hypoxemia and intubation-related complications. This network meta-analysis summarizes the efficacy and safety of preoxygenation methods in adult patients with acute hypoxemic respiratory failure. Methods We searched PubMed, EMBASE, and the Cochrane Library Central Register of Controlled Trials through April 2019 for randomized controlled trials (RCT) that studied the use of conventional oxygen therapy (COT), high-flow nasal cannula (HFNC), noninvasive ventilation (NIV), and HFNC and NIV as preoxygenation before intubation in patients with acute hypoxemic respiratory failure. Citations’ screening, study selection, data extraction, and risk of bias assessment were independently performed by two authors. The primary outcome was the lowest SpO2 during the intubation procedure. Results We included 7 RCTs (959 patients). Patients preoxygenated with NIV had significantly less desaturation than patients treated with COT (mean difference, MD 5.53, 95% CI 2.71, 8.34) and HFNC (MD 3.58, 95% CI 0.59, 6.57). Both NIV (odds ratio, OR 0.43, 95% CI 0.21, 0.87) and HFNC (OR 0.49, 95% CI 0.28, 0.88) resulted in a lower risk of intubation-related complications than COT. There were no significant mortality differences among the use of NIV, HFNC, COT, and HFNC and NIV during preoxygenation. Conclusions In adult patients with acute hypoxemic respiratory failure, NIV is a safe and probably the most effective preoxygenation method.

Prevalence of idiopathic REM behavior disorder: a systematic review and meta-analysis

SLEEP ◽  
2021 ◽  
Author(s):  
Calogero Edoardo Cicero ◽  
Loretta Giuliano ◽  
Jaime Luna ◽  
Mario Zappia ◽  
Pierre-Marie Preux ◽  
...  
Keyword(s):  
Systematic Review ◽  
Subgroup Analysis ◽  
Meta Analysis ◽  
Random Effect Model ◽  
Behavior Disorder ◽  
Significant Heterogeneity ◽  
Pooled Prevalence ◽  
Screening Questionnaires ◽  
Meta Regression

Abstract Study Objectives To provide an overall estimate of the prevalence of idiopathic REM Sleep Behavior Disorder (iRBD). Methods Two investigators have independently searched the PubMed and Scopus databases for population-based studies assessing the prevalence of iRBD. Data about type of diagnosis (polysomnographic diagnosis, defined iRBD [dRBD]; clinical diagnosis, probable RBD [pRBD]), continent, age range of the screened population, quality of the studies, sample size, screening questionnaires and strategies have been gathered. A random effect model was used to estimate the pooled prevalence. Heterogeneity was investigated with subgroup analysis and meta-regression. Results From 857 articles found in the databases, 19 articles were selected for the systematic review and meta-analysis. According to the type of diagnosis, five studies identified dRBD cases given a pooled prevalence of 0.68% (95%CI 0.38-1.05) without significant heterogeneity (Cochran’s Q p=0.11; I 2 = 46.43%). Fourteen studies assessed the prevalence of pRBD with a pooled estimate of 5.65% (95%CI 4.29-7.18) and a significant heterogeneity among the studies (Cochran’s Q p<0.001; I 2 = 98.21%). At the subgroup analysis, significant differences in terms of prevalence were present according to the quality of the studies and, after removing two outlaying studies, according to the continents and the screening questionnaire used. Meta-regression did not identify any significant effect of the covariates on the pooled estimates. Conclusion Prevalence estimates of iRBD are significantly impacted by diagnostic level of certainty. Variations in pRBD prevalence are due to methodological differences in study design and screening questionnaires employed.

scholarly journals Non-Invasive Oxygenation Strategies in Adult Patients with Acute Respiratory Failure: A Protocol for a Systematic Review and Network Meta-analysis

2020 ◽  
Author(s):  
Bruno Leonel Ferreyro ◽  
Federico Angriman ◽  
Laveena Munshi ◽  
Lorenzo del Sorbo ◽  
Niall D Ferguson ◽  
...  
Keyword(s):  
Mechanical Ventilation ◽  
Respiratory Failure ◽  
Acute Respiratory Failure ◽  
Meta Analysis ◽  
Invasive Mechanical Ventilation ◽  
Risk Of Bias ◽  
Adult Patients ◽  
Hypoxemic Respiratory Failure ◽  
Acute Hypoxemic Respiratory Failure ◽  
Non Invasive

Abstract Background: Acute hypoxemic respiratory failure is one of the leading causes of intensive care unit admission and associated with high mortality. Non-invasive oxygenation strategies such as high flow nasal cannula, standard oxygen therapy and non-invasive ventilation (delivered by either face mask or helmet interface) are widely available interventions applied in these patients. It remains unclear which of these interventions are more effective in decreasing rates of invasive mechanical ventilation and mortality. The primary objective of this network meta-analysis is to summarize the evidence and compare the effect of non-invasive oxygenation strategies on mortality and need for invasive mechanical ventilation in patients with acute hypoxemic respiratory failure. Methods: We will search key databases for randomized controlled trials assessing the effect of non-invasive oxygenation strategies in adult patients with acute hypoxemic respiratory failure. We will exclude studies in which the primary focus is either acute exacerbations of chronic obstructive pulmonary disease or cardiogenic pulmonary edema. The primary outcome will be all-cause mortality (longest available up to 90 days). The secondary outcomes will be receipt of invasive mechanical ventilation (longest available up to 30 days). We will assess the risk of bias for each of the outcomes using the Cochrane Risk of Bias Tool. Bayesian network meta-analyses will be conducted to obtain pooled estimates of head-to-head comparisons. We will report pairwise and network meta-analysis treatment effect estimates as risk ratios and 95% credible intervals. Subgroup analyses will be conducted examining key populations including immunocompromised hosts. Sensitivity analyses will be conducted by excluding those studies with high risk of bias and different etiologies of acute respiratory failure. We will assess certainty in effect estimates using GRADE methodology. Discussion : This study will help to guide clinical decision making when caring for adult patients with AHRF and improve our understanding of the limitations of the available literature assessing noninvasive oxygenation strategies in acute hypoxemic respiratory failure.

scholarly journals Prevalence of Hyperhomocysteinemia in China: An Updated Meta-Analysis

Biology ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 959
Author(s):  
Yuan Zeng ◽  
Fei-Fei Li ◽  
Shu-Qian Yuan ◽  
Hao-Kai Tang ◽  
Jun-Hua Zhou ◽  
...  
Keyword(s):  
Subgroup Analysis ◽  
Rural China ◽  
Meta Analysis ◽  
The Elderly ◽  
High Risk Population ◽  
The North ◽  
Meta Regression ◽  
Meta Regression Analysis ◽  
And Control ◽  
Over Time

We conducted a meta-analysis to systematically assess the prevalence of hyperhomocysteinemia (HHcy) in China, its change over time, and its determinants. Literature searches were conducted using English databases (PubMed, Embase, and Web of Science) and Chinese databases (CNKI, CBM, VIP, and Wanfang). The time ranges were from Jan 2014 to Mar 2021 in China. We adopted the random effects model to estimate the pooled positive rates of HHcy and corresponding 95% confidence intervals (95%CI). To find the sources of heterogeneity, we performed subgroup analysis and meta-regression. A total of 29 related articles were identified involving 338,660 participants with 128,147 HHcy cases. The estimated prevalence of HHcy in China was 37.2% (95%CI: 32.6–41.8%, I2 = 99.8%, p for heterogeneity < 0.001). The trend of HHcy prevalence was gradually upward over time, with increases during 2015–2016 (comparison to 2013–2014, p < 0.001), but steady between 2015–2016 and 2017–2018. Subgroup analysis showed that the prevalence was higher in the elderly over 55 years old, males, and residents in the north, inland, and rural China (for each comparison, p < 0.001). Meta-regression analysis revealed that age and area of study contributed to 42.3% of the heterogeneity between studies. The current meta-analysis provides strong evidence that the prevalence of HHcy is increasing in China, and varies substantially across different ages, genders, and geographic distribution. Accordingly, high-risk population groups should be focused on, and public health policies and strategies should be carried out to prevent and control HHcy in China.

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