Effect of low-dose aspirin on health outcomes: An umbrella review of systematic reviews and meta-analyses.

Aims: This study aimed to use an umbrella review methodology to capture the range of outcomes that were associated with low-dose aspirin and to systematically assess the credibility of this evidence.

Methods: Aspirin is associated with several health outcomes, but the overall benefit/risk balance related to aspirin use is unclear. We searched three major databases up to 15 August 2019 for meta-analyses of observational studies and randomized controlled trials (RCTs) including low-dose aspirin compared to placebo or other treatments.

Magnesium and health outcomes: an umbrella review of systematic reviews and meta-analyses of observational and intervention studies.

Purpose: To map and grade all health outcomes associated with magnesium (Mg) intake and supplementation using an umbrella review.

Methods: Umbrella review of systematic reviews with meta-analyses of observational studies and randomized controlled trials (RCTs) using placebo/no intervention as control group. We assessed meta-analyses of observational studies based on random-effect summary effect sizes and their p values, 95% prediction intervals, heterogeneity, small-study effects and excess significance.

The risk stratification in atrial fibrillation.

Atrial fibrillation (AF) is the most common rhythm disorder and represents a major public health problem because it carries an increased risk of arterial thromboembolism and ischemic stroke. Because the absolute benefit of antithrombotic therapy depends on the underlying risk of stroke, an accurate stratification of patients' risk is needed to choose the appropriate antithrombotic strategy. Over the years, several stroke risk stratification models (RSMs) were developed based on the 'classic' risk factors for stroke such as increasing age, hypertension, diabetes mellitus, and left ventricular dysfunction.

Helicobacter pylori: usefulness of an empirical fourth-line rifabutin-based regimen.

Helicobacter pylori represents the major cause of gastric cancer, gastric lymphoma and peptic ulcer diseases. In some cases, the infection persists even after three rounds of treatment. The evaluated article reports on the efficacy of an empirical multicenter, prospective fourth‑line rescue study with rifabutin in patients with three consecutive eradication failures.