Background Few studies have examined the temporal trends of Helicobacter pylori
prevalence worldwide. We aimed to identify the changes in global prevalence of H pylori …

Objective To review the evidence on the effectiveness of public health measures in reducing
the incidence of covid-19, SARS-CoV-2 transmission, and covid-19 mortality. Design …

Introduction Meta-analyses implicate immune dysfunction in depression confirming
increased levels of circulating immune proteins (eg, cytokines) in depression cases …

Studies combined in a meta‐analysis often have differences in their design and conduct that
can lead to heterogeneous results. A random‐effects model accounts for these differences in …

Emphasizing customer satisfaction as a strategic lever for enhancing business performance
is a widespread business practice. However, just over 25 years of empirical studies by …

Background We previously showed rising primary antibiotic resistance of Helicobacter pylori
during 1990–2015 in the Asia-Pacific region. However, whether primary antibiotic resistance …

Objective To investigate the impact of patient and public involvement (PPI) on rates of
enrolment and retention in clinical trials and explore how this varies with the context and …

Objective To investigate the role of air pollutants in risk of dementia, considering differences
by study factors that could influence findings. Design Systematic review and meta-analysis …

Background The potential role of Tai Chi in improving sarcopenia and frailty has been
shown in randomized controlled trials (RCTs). This systematic review and meta-analysis …

Background: Delirium is common in hospitalized patients and is associated with worse
outcomes. Antipsychotics are commonly used; however, the associated benefits and harms …