Response styles theory postulates that rumination is a central factor in occurrence, severity and maintaining of depression. High neuroticism has been associated with tendency to ruminate.

To evaluate the relationships between rumination, neuroticism and depression in a naturalistic prospective cohort of primary care patients with depressive disorders with life-chart methodology.

We hypothesized, that rumination would correlate with severity and duration of depression and with concurrent anxiety, gender and neuroticism.

In the Vantaa Primary Care Depression Study, a stratified random sample of 1119 adult patients was screened for depression using the Prime-MD. Depressive and comorbid psychiatric disorders were diagnosed using SCID-I/P and SCID-II. Of the 137 patients with depressive disorders, 82% completed the five-year follow-up with a graphic life chart. Neuroticism was measured with the Eysenck Personality Inventory (EPI-Q). Response styles were investigated at five years using the Response Styles Questionnaire (RSQ-43).

Rumination correlated significantly with Hamilton Depression Rating Scale (r = 0.54), Beck Depression Inventory (r = 0.61), Beck Anxiety Inventory (r = 0.50), Beck Hopelessness Scale (r = 0.51) and Neuroticism (r = 0.58). Rumination correlated also with proportion of follow-up time spent depressed (r = 0.38). In multivariate regression, high rumination was significantly predicted by current depressive symptoms and neuroticism, but not by anxiety symptoms or preceding duration of depressive episodes.

Rumination correlated with current severity of depression, but the association with preceding episode duration remained uncertain. The association between neuroticism and rumination was strong. The findings are consistent with rumination as a state-related phenomenon, which is also strongly intertwined with traits predisposing to depression.

The authors have not supplied their declaration of competing interest.