Alexithymia in children with medically unexplained symptoms: a systematic review.

Objective: Adult research investigating the link between alexithymia and medically unexplained symptoms (MUS) has found a significant relationship between increased alexithymia and MUS. This difficulty in expressing emotions is likely to begin in childhood so the objective of this paper is to present a quantitative review of studies focussing on the association between MUS and alexithymia in children.

Methods: Databases were searched with predefined terms relating to alexithymia and MUS in children (0-17 years). Two reviewers independently assessed abstracts, extracted data and undertook quality analyses. Systematic review methods were used in accordance with Cochrane guidelines.

Results: Ten studies met the criteria for inclusion in the review. Seven of the eight studies which focused on a comparison between children with MUS and healthy controls, found higher levels of self-reported alexithymia in the children with MUS. However, in the two studies where children were asked to complete tasks that objectively measure alexithymia, significant differences were not found. Results of studies comparing alexithymia in children with MUS and children with medical/psychiatric controls were inconsistent; there was some evidence of increased anxiety and depression in young people with alexithymia and MUS but inconsistency of measures across studies makes drawing conclusions difficult.

Conclusion: There is preliminary evidence that children with MUS have significantly higher levels of alexithymia than controls based on self-report measures; however, this finding was not replicated in objective tasks of alexithymia. Future studies should include validated tasks that objectively measure emotion recognition abilities and focus on possible mediating factors such as neurodevelopmental and mental health difficulties.