A prospective long-term follow-up study of alexithymia in obsessive-compulsive disorder

Studies evaluating the stability of alexithymia over long follow-up periods are rare. We examined the temporal stability of alexithymia in patients with obsessive-compulsive disorder (OCD) over 6 years and the association of alexithymia with the long-term outcome of OCD.

Of 42 patients with OCD, 34 (81%) could be reassessed 6 years after inpatient treatment. The 20-item Toronto Alexithymia Scale, Yale-Brown Obsessive-Compulsive Scale, and Hamilton Depression Rating Scale were used at pretreatment, posttreatment, and follow-up.

The 20-item Toronto Alexithymia Scale total scores and its factors 1 and 2 decreased significantly during follow-up, whereas factor 3 remained stable. High correlations of the 20-item Toronto Alexithymia Scale total scores (r = 0.84, P < .001) and its 3 factors emerged between posttreatment and follow-up, suggesting relative stability over several years. Regression analyses (with and without controlling for depressive symptoms) showed that higher alexithymia scores did not predict a worse long-term outcome of OCD.

Relative stability over such a very long follow-up period strongly supports the view that alexithymia is a stable psychologic characteristic in patients with OCD. The result that higher alexithymia scores were not associated with poorer long-term outcome of OCD might be explained with the decrease of alexithymia during treatment and follow-up. However, our sample size was small, and further research is clearly required to evaluate the impact of changes in alexithymia and its association with the course of OCD.