• S N Yao, J Cottraux, and R Martin.
• Unité de Traitement de l'Anxiété, CH Neurologique de Lyon.
• Encephale. 1999 Sep 1; 25 (5): 461-9.

UnlabelledRecent research suggested that the irrational interpretations of intrusive thoughts might be cognitive structures underlying obsessive compulsive disorder (OCD). We present a study on intrusive thoughts and their interpretations in 36 patients suffering from OCD (DSM IV criteria), compared with 36 sex and age matched non clinical subjects, with the Intrusive Thoughts and their Interpretations Questionnaire-revised version (ITIQ-r). This questionnaire measures intrusive thoughts intensity and three types of interpretation: responsibility, guilt and inferiority. The measures of OCD, of depression, of social phobia and of anxiety have been used.ResultOCD patients reported more frequent intrusive thoughts and higher irrational interpretations than controls. The higher the intrusive thoughts, the higher the irrational interpretations. The multiple regression showed that both intrusive thoughts and irrational interpretations were respectively predicted by obsessional compulsive pathology (the Obsessive Thoughts Checklist or the Y-BOCS). The Y-BOCS was the only predictor for inferiority interpretation, but there was no significant predictor for responsibility or for guilt interpretations. Responsibility correlated only with aggressive intrusive thoughts. Guilt was related to intrusions about fear of loss. Inferiority was highly correlated with intrusive thoughts about perfectionism and sexuality.

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