Objective To estimate the global prevalence of meeting the WHO guidelines for both aerobic
and muscle-strengthening activities (MSA) in populations aged≥ 5 years, and whenever …

The clinical course and outcome of COVID-19 are highly variable, ranging from
asymptomatic infections to severe disease and death. Understanding the risk factors of …

In medical research, when independent variables are categorical (ie, dividing groups),
statistical analysis is often required. This situation mostly occurs on randomized controlled …

Background: Some data suggest a higher incidence of diagnosis of autoimmune
inflammatory rheumatic diseases (AIRDs) among patients with a history of COVID-19 …

As mounting evidence suggests a higher incidence of adverse consequences, such as
disruption of the immune system, among patients with a history of COVID-19, we aimed to …

Considering the significant burden of post-acute COVID-19 conditions among patients
infected with SARS-CoV-2, we aimed to identify the risk of acute respiratory complications or …

Variables measured in medicine are usually continuous, such as blood pressure, serum
glucose, and drug dosage. There are statistical methods to confirm whether these variables …

We investigated whether SARS-CoV-2 infection is associated with short-and long-term
neuropsychiatric sequelae. We used population-based cohorts from the Korean nationwide …

Importance Despite the COVID-19 pandemic's effect on daily life, limited research exists on
the prevalence and risk factors of suicidality and sadness among South Korean adolescents …

Importance There is a lack of comprehensive data on the association of the COVID-19
pandemic with the prevalence of physical activity in large-scale data sets. Objective To …