Behavioral and Psychiatric Disorders in Adult Male Carriers of Fragile X

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Abstract

Objective

In the present study we examined the incidence of psychiatric and behavioral problems among male carriers of the fragile X gene.

Method

Retrospective data on carrier males were gathered using the family informant method. Each of 56 fragile X carrier women was interviewed about her father by an examiner blind to the father's carrier status. The interviewer administered measures of (1) behaviors related to DSM-III-R Axis I disorders, (2) adult attention-deficit hyperactivity disorder (ADHD) behaviors, (3) parental bonding skills, and (4) abusive behaviors. The endorsements from 24 women with fragile X fathers were compared with endorsements from 32 women with nonfragile X fathers.

Results

The results show a higher incidence of psychopathology among the fragile X males (relative to nonfragile X fathers) for behaviors related to adult ADHD, parental bonding, abuse; and particularly for alcohol abuse/dependence and obsessive-compulsive disorder behaviors.

Conclusions

These findings support the hypotheses that some “nonpenetrant” males may indeed be mildly affected carriers and that there is a broad spectrum of involvement among carrier males.

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