Stability of Both Cognitive-Affective and Somatic Symptoms in Multiple Sclerosis
Objectives: To evaluate the stability of the domains of somatic and cognitive-affective symptoms of depression in MS.
Methods: Participants (N = 349) were recruited from an outpatient clinic at a large medical center in New Jersey. Longitudinal data were collected as part of an ongoing research project. Participants completed a BDI-II and demographic questionnaire. Prior research was used to divide total BDI-II scores into somatic and cognitive-affective scores. Linear regression was used to examine the relationship between time and change in somatic and cognitive-affective BDI-II scores. Linear regression was also used to relate somatic and cognitive-affective BDI-II scores at baseline and follow-up.
Results: Time did not significantly predict change in either cognitive-affective (β= -.027, p = .613) or somatic scores (β = .018, p = .735). Initial cognitive-affective scores predicted cognitive-affective scores at follow-up (β = .604, p < .001). Initial somatic scores predicted somatic scores at follow-up (β = .533, p < .001).
Conclusions: Depression appears stable across both somatic and cognitive-affective domains over time.