High somatic distress with high long-term stability in selected patients with chronic depression: a 3-year follow-up of ratings with Karolinska Scales of Personality (KSP)

The main aim of the present study was to investigate mean levels and long-term stability of three scales from the Karolinska Scales of Personality (KSP), assessing somatic components of anxiety proneness in selected patients with chronic depressive symptoms. The KSP was filled in by 84 patients (26 men and 58 women) with a history of or ongoing major depression and audiological, or other comorbid somatic, symptoms. Mean scores for the Somatic Anxiety, Muscular Tension and Psychasthenia scales were above two standard deviations compared to a normative group sampled from the population. The KSP was filled in at follow-up by 65 patients. The mean interval between the ratings was 3.5 years. Comparisons between the ratings of the three scales revealed no significant mean score differences, and quite high individual stability. The mean scores were significantly increased in comparisons with depressed patients in primary care suggesting that these patients with chronic depression may comprise a depressive sub-type characterized by high "somatic distress". A putative origin for the high and stable scores in the presented sub-group of depressed patients, and the concept of "personality trait" in use even for pronounced symptoms, are discussed.