Case-cohort study design has been widely used for its cost-effectiveness. In any real study, there are always other important outcomes of interest beside the failure time that the original case-cohort ...

Different approaches to cohort study design in the context of biomarkers of aging. Biomarkers of aging are commonly validated using cross-sectional or longitudinal study designs. Cross-sectional ...

Main outcome measures Cumulative time dependent intake of preservatives, including those in industrial food brands, assessed ...

Background Insomnia symptoms are prevalent in older adults and linked to cardiovascular disease (CVD), but the role of long-term symptom trajectories remains unclear. We investigated associations ...

Introduction Students enrolling in higher education often adopt lifestyles linked to worse mental health, potentially contributing to the peak age onset of mental health problems in early adulthood.

Correspondence to Dr Nikola Drca, Department of Medicine Huddinge, Karolinska Institutet, Stockholm 141 86, Sweden; nikola.drca{at}ki.se Objective Previous studies have found that endurance sport ...