Multiple studies show an association between inflammatory markers and major depressive disorder (MDD). People with chronic low-grade inflammation may be at an increased risk of MDD, often in the form of sickness behaviors. We hypothesized that inflammation is predictive of the severity and the course of a subset of MDD symptoms, especially symptoms that overlap with sickness behavior, such as anhedonia, anorexia, low concentration, low energy, loss of libido, psychomotor slowness, irritability, and malaise. We tested the association between basal and lipopolysaccharide (LPS)-induced inflammatory markers with individual MDD symptoms (measured using the Inventory of Depressive Symptomatology Self-Report) over a period of up to 9 years using multivariate-adjusted mixed models in 1147-2872 Netherlands Study of Depression and Anxiety (NESDA) participants. At baseline, participants were on average 42.2 years old, 66.5% were women and 53.9% had a current mood or anxiety disorder. We found that basal and LPSstimulated inflammatory markers were more strongly associated with sickness behavior symptoms at up to 9-year follow-up compared with non-sickness behavior symptoms of depression. However, we also found significant associations with some symptoms that are not typical of sickness behavior (e.g., sympathetic arousal among others). Inflammation was not related to depression as a unified syndrome but rather to the presence and the course of specific MDD symptoms, of which the majority were related to sickness behavior. Anti-inflammatory strategies should be tested in the subgroup of MDD patients who report depressive symptoms related to sickness behavior.

Routine Outcome Monitoring (ROM) concerns the repeated measurement of the progress of a patient's treatment during the course of therapy. ROM is receiving mounting attention as an important quality tool, and because of increased emphasis on health care accountability and cost containment. ROM seems especially relevant for complicated chronic patients that require a long-term treatment. Although addictive patients often have these clinical characteristics, ROM is relatively less investigated within addiction treatment. The present article summarizes recent state-of-the-art information concerning the use of ROM in mental health care and particularly in addiction treatment. First, some basics about ROM in general are described. Next, evidence for the effectiveness of ROM in mental health care and addiction treatment is reviewed. Finally, some clinical & research recommendations are suggested for the use of ROM in addiction treatment.

Background Depression shows a large heterogeneity of symptoms between and within persons over time. However, most outcome studies have assessed depression as a single underlying latent construct, using the sum score on psychometric scales as an indicator for severity. This study assesses longitudinal symptom‐specific trajectories and within‐person variability of major depressive disorder over a 9‐year period. Methods Data were derived from the Netherlands Study of Depression and Anxiety (NESDA). This study included 783 participants with a current major depressive disorder at baseline. The Inventory Depressive Symptomatology‐Self‐Report (IDS‐SR) was used to analyze 28 depressive symptoms at up to six time points during the 9‐year follow‐up. Results The highest baseline severity scores were found for the items regarding energy and mood states. The core symptoms depressed mood and anhedonia had the most favorable course, whereas sleeping problems and (psycho‐)somatic symptoms were more persistent over 9‐year follow‐up. Within‐person variability was highest for symptoms related to energy and lowest for suicidal ideation. Conclusions The severity, course, and within‐person variability differed markedly between depressive symptoms. Our findings strengthen the idea that employing a symptom‐focused approach in both clinical care and research is of value.

ObjectivesIf patients change their perspective due to treatment, this may alter the way they conceptualize, prioritize, or calibrate questionnaire items. These psychological changes, also called “response shifts,” may pose a threat to the measurement of therapeutic change in patients. Therefore, it is important to test the occurrence of response shift in patients across their treatment.MethodsThis study focused on self‐reported psychological distress/psychopathology in a naturalistic sample of 206 psychiatric outpatients. Longitudinal measurement invariance tests were computed across treatment in order to detect response shifts.ResultsCompared with before treatment, post‐treatment psychopathology scores showed an increase in model fit and factor loading, suggesting that symptoms became more coherently interrelated within their psychopathology domains. Reconceptualization (depression/mood) and reprioritization (somatic and cognitive problems) response shift types were found in several items. We found no recalibration response shift.ConclusionThis study provides further evidence that response shift can occur in adult psychiatric patients across their mental health treatment. Future research is needed to determine whether response shift implies an unwanted potential bias in treatment evaluation or a desired cognitive change intended by treatment.

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