Incidence of Syndromes Associated With Frontotemporal Lobar Degeneration in 9 European Countries.

Importance: Diagnostic incidence data for syndromes associated with frontotemporal lobar degeneration (FTLD) in multinational studies are urgent in light of upcoming therapeutic approaches.

Objective: To assess the incidence of FTLD across Europe.

Design, Setting, And Participants: The Frontotemporal Dementia Incidence European Research Study (FRONTIERS) was a retrospective cohort study conducted from June 1, 2018, to May 31, 2019, using a population-based registry from 13 tertiary FTLD research clinics from the UK, the Netherlands, Finland, Sweden, Spain, Bulgaria, Serbia, Germany, and Italy and including all new FTLD-associated cases during the study period, with a combined catchment population of 11 023 643 person-years.

Maintained acute stroke admission during the first wave COVID-19 pandemic in Sweden, a register-based study.

Objectives: Clinicians and researchers have addressed concerns about the negative impact of COVID-19 outbreaks on the ability of health care systems to provide timely assessment and acute therapies to patients with stroke. The aim of this study is to describe stroke care during the first wave of the COVID-19 pandemic compared to the same period the year before at an acute care hospital in Sweden.

Materials And Methods: In this cohort study data were collected from March 1 to August 31 in 2019 and 2020 on all patients diagnosed with stroke and TIA and registered at Danderyd Hospital in the national quality registry (Riksstroke).

Has the attention deficit hyperactivity disorder phenotype become more common in children between 2004 and 2014? Trends over 10 years from a Swedish general population sample.

Background: Studies have reported increases in clinically diagnosed and treated attention deficit hyperactivity disorder (ADHD) during the last decade, but it is unclear if this reflects an increase in the underlying ADHD phenotype. We aimed to clarify if there has been an increase in the prevalence of ADHD-like traits in the general population from 2004 to 2014.

Method: Data were collected from 9-year-old twins (19,271), participating in the population-based Child and Adolescent Twin Study in Sweden between 2004 and 2014.

Sex-specific manifestation of genetic risk for attention deficit hyperactivity disorder in the general population.

Background: Attention deficit hyperactivity disorder (ADHD) is more commonly diagnosed in males than in females. A growing body of research suggests that females with ADHD might be underdiagnosed or receive alternative diagnoses, such as anxiety or depression. Other lines of reasoning suggest that females might be protected from developing ADHD, requiring a higher burden of genetic risk to manifest the disorder.