Psychother Psychosom 2010;79:312–318. doi: 10.1159/000319312, William C. Reeves:
Conclusions: 29% of our participants with CFS had a personality disorder, compared to 7% of the well controls. Our results suggest that CFS is associated with an increased prevalence of maladaptive personality features and personality disorders.
maladaptive personality is not specific to CFS, it might be associated with illness per se rather than with a specific condition.
More Psycho blah blah by William C. Reeves.