Objective To determine the effectiveness of high-efficacy disease-modifying therapies
(heDMTs) vs medium-efficacy disease-modifying therapies (meDMT) as the first treatment …

Propensity score analysis is a popular method to control for confounding in observational
studies. A challenge in propensity methods is missing values in confounders. Several …

We exploit the adoption of US state-level labor protection laws to study the effect of
employment protection on corporate investment rates and sales growth. We find that …

OBJECTIVES: Central to the debate over school and child care reopening is whether
children are efficient coronavirus disease 2019 (COVID-19) transmitters and are likely to …

Background Whether the route of anaesthesia is an independent risk factor for dementia
remains unclear. Therefore, we conducted a propensity score–matched (PSM) population …

Rationale: Since their approval, there has been no real-world or randomized trial evidence
evaluating the effect of the antifibrotic medications pirfenidone and nintedanib on clinically …

Objective To evaluate the cardiovascular safety of canagliflozin, a sodium-glucose
cotransporter 2 inhibitor for the treatment of type 2 diabetes mellitus, in direct comparisons …

Importance Bleeding is the most common complication after percutaneous coronary
intervention (PCI) and is associated with increased morbidity and health care costs. The …

Propensity score matching (PSM) has been widely used to reduce confounding biases in
observational studies. Its properties for statistical inference have also been investigated and …

Purpose: Many studies have investigated the impact of the No Child Left Behind (NCLB) Act
and its sanctions on students and teachers. Little research, however, has systematically …