Background: Thought content and its impact on sustained attention in individuals with attention deficit hyperactivity disorder (ADHD) are topics of growing interest in literature.

Objective: We hypothesised that subclinical obsessive thoughts may be correlated with attention lapses in individuals with ADHD.

Method: Thirty children diagnosed with ADHD participated in the study and their level of subclinical obsessive thoughts, attention, and executive function were measured using Children Yale-Brown Obsessive Scale and Conners’ Continuous Performance Test II.

Results: No significant correlation between sustained attention impairment and the level of obsessive thoughts in patients with ADHD was found. Nevertheless, patients with ADHD with subclinical obsessive thoughts showed more commission errors than those without (W = 51.5; p = 0.02).

Conclusion: The nature of thought content in individuals with ADHD should be linked to executive dysfunction rather than attentional impairment. This could be of importance in the therapeutic strategy choice, addressing the importance of executive function remediation in the specific context of subclinical obsessive thoughts.

• Key points

•  Patients with ADHD, without OCD or ASD comorbidity, still present subclinical obsessive thoughts (36% of our sample). • Subclinical obsessive thoughts could be a part of thought content in patients with ADHD.

•  • Subclinical obsessive thoughts as measured by the CPT-II are not correlated with attention function in patients with ADHD.

•  • ADHD patients with subclinical obsessive symptoms present more impairment in response inhibition than the ones without.

•  • Results on subclinical obsessive thoughts are similar to those on another type of thought content called ‘mind wandering’.

•  • A clinical improvement strategy for patients with ADHD could be using executive function remediation rather than classical attention function remediation, according to both to our and previous results.

背景：思想缺陷及其对注意力缺陷多动障碍（ADHD）患者持续注意力的影响是文学界日益关注的话题。

目的：我们假设亚临床强迫症可能与多动症患者的注意力下降有关。

方法： 30名被诊断为多动症的儿童参加了这项研究，并使用儿童耶鲁-布朗强迫症量表和康纳斯持续表现测验II来测量他们的亚临床强迫症，注意力和执行功能水平。

结果：在多动症患者中，持续注意力障碍与强迫思维水平之间没有显着相关性。尽管如此，患有亚临床强迫症的ADHD患者比没有ADHD的患者表现出更多的委托错误（W  = 51.5；p  = 0.02）。

结论：多动症患者思想内容的性质应与执行功能障碍有关，而不应与注意力障碍有关。这在治疗策略的选择中可能很重要，因为要解决亚临床强迫症特定背景下执行功能补救的重要性。

• 关键点

•  没有OCD或ASD合并症的ADHD患者仍然表现出亚临床强迫症（占我们样本的36％）。•亚临床强迫症可能是多动症患者思想内容的一部分。

•  •通过CPT-II测量的亚临床强迫症与ADHD患者的注意功能无关。

•  •具有亚临床强迫症的ADHD患者比没有ADHD的患者表现出更多的反应抑制障碍。

•  •亚临床强迫症的结果与另一种思想内容“心灵漫游”的结果相似。

•  •根据我们和以前的结果，ADHD患者的临床改善策略可能是使用执行功能矫正，而不是经典的注意功能矫正。