The aims of the present study were to inquire into the prevalence of f
ibromyalgia syndrome, to assess nonarticular tenderness, to measure fi
bromyalgia syndrome-related symptoms, quality of life, and functional
impairment among posttraumatic stress disorder (PTSD) patients as comp
ared with control subjects. Furthermore, the differences between the P
TSD patients with and without fibromyalgia syndrome were studied. Twen
ty-nine PTSD patients and 37 control subjects were assessed as to the
diagnosis of fibromyalgia syndrome according to the American College o
f Rheumatology. Tenderness was assessed manually and with a dolorimete
r. Fibromyalgia syndrome-related symptoms, quality of life, physical f
unctioning, PTSD symptomatology, and psychiatric features were assesse
d by valid and reliable self-report inventories. Results showed that t
he prevalence of fibromyalgia syndrome in the PTSD group was 21% vs. 0
% in the control group. Furthermore, the PTSD group was more tender th
an the control group. PTSD subjects suffering from fibromyalgia syndro
me were more tender, reported more pain, lower quality of life, higher
functional impairment and suffered more psychological distress than t
he PTSD patients not having fibromyalgia syndrome. It is suggested tha
t previous reports on diffuse pain in PTSD in fact described undiagnos
ed fibromyalgia syndrome. The link between psychological stress and pa
in syndromes is emphasized. (C) 1997 Elsevier Science Inc.