Relative age within the school year (‘relative age’) is associated with increased rates of symptoms and diagnoses of mental health disorders, including ADHD. We aimed to investigate how relative age influences mental health and behaviour before, during and after school (age range: 4–25 years).

中文翻译：

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学年的相对年龄和儿童、青春期和成年早期心理健康问题的风险

学年内的相对年龄（“相对年龄”）与精神疾病（包括多动症）的症状和诊断率增加有关。我们旨在调查相对年龄如何影响上学前、上学期间和放学后的心理健康和行为（年龄范围：4-25 岁）。