The prevalence of diagnosed Autism Spectrum Disorder (ASD) has increased substantially across the world. Much – or even most – prevalence increase seems to reflect changes in diagnostic practice and ascertainment. A key part of ASD assessment is to document that the relevant symptoms are associated with clinical impairment. The aim of the present study is to capitalize on a nationwide longitudinal study spanning 15 consecutive birth year cohorts in order to investigate whether there has been a secular change in how parents perceive the impairment and suffering conferred by autism symptomatology in their children.

中文翻译：

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感知到的儿童障碍和“自闭症流行”

诊断为自闭症谱系障碍 (ASD) 的患病率在全球范围内大幅增加。很多——甚至大部分——患病率的增加似乎反映了诊断实践和确定的变化。ASD 评估的一个关键部分是记录相关症状与临床损伤相关。本研究的目的是利用一项跨越 15 个连续出生年份队列的全国性纵向研究，以调查父母如何看待自闭症症状给孩子带来的损害和痛苦是否存在长期变化。