Increase in Occurrence of Attention Deficit Hyperactivity Disorder Differs by Age Group and Gender-Finnish Nationwide Register Study.

ABSTRACT:

Introduction

This study describes epidemiology of attention deficit hyperactivity disorder (ADHD) and use of ADHD medication across all age groups in Finland.

Methods

This retrospective study is based on nationwide registers in Finland. The study population included individuals with ADHD diagnosis and/or an ADHD medication record at least once during 2015-2020.

Results

The yearly prevalence of ADHD was higher in males than in females and was highest in the age groups of 6- to 12- and 13- to 17-year-old males. In 2020, the yearly prevalence was 4.2% in ≤12-year-old, 6.7% in 13- to 17-year-old, 0.7% in ≥18-year-old males, and 1.1%, 2.6%, and 0.6%, respectively, in females. The gender-related differences were greatest among 6- to 12- and 13- to 17-year-olds, after which

SUBMITTER: Westman E 

PROVIDER: S-EPMC11743994 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature