PSYCHOLOGICAL DIFFERENCES BETWEEN REFLEX SYMPATHETIC DYSTROPHY AND NON-RSD CHRONIC PAIN PATIENTS

This study examined possible psychological differences between Reflex Sympathetic Dystrophy (RSD) and non-RSD chronic pain patients. Unlike the few previous studies in this area, this study controlled statistic ally for age and pain duration differences across diagnostic groups, a nd included a non-RSD limb pain control group. Subjects were a consecu tive series of 34 RSD, 50 non-RSD limb pain (Limb), and 165 low back p ain (LBP) patients presenting for treatment at the Rush Pain Center, A nalyses revealed that RSD patients reported more somatization and phob ic anxiety on the Brief Symptom Inventory than LBP patients. RSD patie nts also reported greater coping with pain through diverting attention than LBP patients did on the Coping Strategies Questionnaire. Compari sons between the RSD and Limb groups revealed no significant differenc es with the exception of somatization scores. The relationship between distress and pain severity was found to be stronger in RSD and Limb p atients than in LBP patients, These results provide partial support fo r clinical assumptions that RSD patients are more psychologically dysf unctional than other chronic pain patients, However, these conclusions do not generalize across all comparison groups, The fact that RSD and non-RSD limb pain patients were quite similar on nearly all measures suggests that sympathetic mediation of pain is not the source of these psychological differences.