Seasonal Variations in the Severity of ADHD Symptoms in the Dutch General Population
Suzan W N Vogel1, Margreet L Ten Have2, Denise Bijlenga1
11 PsyQ, Expertise Center Adult ADHD, The Hague, The Netherlands.
Objective:
This is the first study to examine self-reported seasonal differences in the severity of ADHD symptoms in adults from the general population.
Method:
Data were analyzed from N = 5,303 respondents participating in the second wave of the Netherlands Mental Health Survey and Incidence Study-2, a population-based study on mental health. ADHD symptoms were assessed using the Adult ADHD Self-Report Scale Screener. As indicators of the severity of ADHD symptoms, the total ADHD symptom score and inattention and hyperactivity subscale scores were examined.
Results:
Compared with participants who were assessed in autumn, total ADHD and inattention subscale scores were significantly higher among participants who were assessed in spring or summer; the hyperactivity subscale score was significantly higher in spring.
Conclusion:
We found seasonal variations in the severity of ADHD symptoms, which was highest in those assessed in spring and summer. Researchers should be aware of this in the diagnostic process.
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