Objective

The aim of the present study was to examine the intellectual quotient (IQ) in a large sample of youth with obsessive-compulsive disorder (OCD) and to compare them with typically developing individuals (TDI), adding to the scarce literature focusing on the intelligence evaluation of this population.

Method

The IQ of 82 children and adolescents with OCD and 82 TDI, matched by age, sex, handedness and education, was assessed by the Wechsler Abbreviated Scale of Intelligence (WASI, Brazilian-version). Statistics were performed with independent t-test, correlations and ANCOVA (controlling for motor and processing speed and comorbidities), corrected using the Benjamini-Hochberg multiple comparisons correction.

Results

No between-group differences were found on the full-scale IQ (FSIQ, p-value = 0.545) or verbal IQ (VIQ; p-value = 0.423). In contrast, a significant difference was found in the performance IQ (PIQ; p-value = 0.045, Cohen's d = 0.379) and IQ discrepancy, i.e. the difference between VIQ and PIQ (p-value = 0.012, Cohen's d = 0.494). Analyses of the PIQ subtest scores revealed impaired performance in the Block Design test among OCD patients (p-value = 0.012, Cohen's d = 0.273), that remained after correcting for motor and processing speed and comorbidity status.

Conclusion

In our sample of pediatric patients with OCD, the FSIQ, VIQ and PIQ were within the average range (90-110), and we did not find between-group differences in the FSIQ or VIQ, indicating that youth with OCD do not present major deficits in intellectual efficiency. Nevertheless, replicating an extensive adult literature, we found lower PIQ scores in youth patients, that were not better explained by motor and processing speed or comorbidity status.

中文翻译：

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小儿强迫症患者的智商（IQ）

目的

本研究的目的是检查大量强迫症青年（OCD）中的智商（IQ），并将其与典型的发展中个体（TDI）进行比较，从而增加了有关智力的稀缺文献对这一人群的评估。

方法

韦氏智商缩写量表（WASI，巴西语版本）评估了82名患有强迫症和82 TDI的儿童和青少年的智商，并根据年龄，性别，习惯和教育程度进行了评估。使用独立的t检验，相关性和ANCOVA（控制运动和处理速度以及合并症）进行统计，并使用Benjamini-Hochberg多重比较校正进行校正。

结果

在全面智商（FSIQ，p值= 0.545）或口头智商（VIQ; p值= 0.423）上未发现组间差异。相反，在性能IQ（PIQ； p值= 0.045，Cohen d = 0.379）和IQ差异之间存在显着差异，即VIQ和PIQ之间的差异（p值= 0.012，Cohen d = 0.494）。对PIQ子测验分数的分析显示，强迫症患者的Block Design测试中的表现受损（p值= 0.012，Cohen d = 0.273），在校正运动和处理速度以及合并症后仍然存在。

结论

在我们的小儿强迫症患者样本中，FSIQ，VIQ和PIQ处于平均范围内（90-110），并且我们没有发现FSIQ或VIQ的组间差异，这表明患有OCD的青年未表现出主要智力效率不足。但是，通过复制大量的成人文献，我们发现青年患者的PIQ得分较低，而运动和处理速度或合并症状态并不能更好地说明这一点。