Incidence of seropositive and seronegative rheumatoid arthritis in Denmark: a nationwide population-based study.

Objective: To investigate and compare trends in incidence rates (IRs) of seropositive and seronegative rheumatoid arthritis (RA) in Denmark using various data sources for serostatus definition.

Method: This nationwide population-based cohort study was based on data from Danish healthcare and clinical quality registries between 2000 and 2018. Information on anti-cyclic citrullinated peptide and immunoglobulin M rheumatoid factor was obtained, and definitions of seropositivity according to the number of applied data sources were prespecified.

Temporal trends in mortality in patients with systemic lupus erythematosus: a Danish population-based matched cohort study.

Objective: Excess mortality has been demonstrated in patients with SLE compared with the general population. We aimed to investigate the 5-year and 10-year all-cause mortality in patients with SLE compared with the general population in recent decades.

Methods: This was a Danish nationwide population-based exposure-matched cohort study.

Temporal trends in mortality in patients with rheumatoid arthritis: a Danish population-based matched cohort study.

Objectives: To investigate the 5-year all-cause mortality in patients with RA compared with the general population.

Methods: This was a nationwide population-based matched cohort study. RA patients diagnosed between 1996 and the end of 2015 were identified using administrative heath registries and followed until the end of 2020 allowing 5 years of follow-up.

Effects of Aquatic Training in Children with Autism Spectrum Disorder.

A variety of aquatic training regimens have been found to be beneficial for individuals with autism spectrum disorders (ASD) in multiple domains. This study investigated and compared the efficacy of two aquatic training regimens (technical vs. game-based) on gross motor skills, stereotypy behavior and emotion regulation in children with ASD.