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Background: Fatigue is a core symptom of major depressive disorder (MDD) and is frequently refractory to antidepressant treatment, leading to unfavorable clinical/psychosocial outcomes. Dysfunctional self-reported interoception (i.e., maladaptive focus on the body's physiological condition) is prevalent in MDD and could contribute to residual symptom burden of fatigue. Therefore, we explored (a.) cross-sectional correlations between both dimensions and investigated (b.) prospective associations between interoceptive impairments at admission and symptom severity of fatigue at the end of hospitalization., Methods: This observational, exploratory study included 87 patients suffering from MDD who completed self-rating scales, the Multidimensional Assessment of Interoceptive Awareness, Version 2 (MAIA-2), and the Multidimensional Fatigue Inventory (MFI-20), at the beginning and end of hospitalization. Bivariate correlations (r) and hierarchical regression analyses were performed., Results: The cross-sectional analysis showed moderate to large negative correlations between the MAIA-2 and MFI-20 dimensions except for the Not-Distracting scale. Symptoms of general, physical, and mental fatigue at the end of hospitalization were predicted by reduced body Trusting (β = -.31, p = .01; β = -.28, p = .02; β = -.31, p = .00, respectively). Increased Body Listening (β = .37, p = .00), Not-Worrying (β = .26, p = .02), and diminished Attention Regulation (β = -.32, p = .01) predicted higher mental fatigue., Conclusions: Diminished body confidence at baseline identified patients at risk for post-treatment fatigue and could therefore serve as a target for improving antidepressant therapy. Body-centered, integrative approaches could address treatment-resistant fatigue in MDD. However, clinicians may also consider the potential adverse effect of increased Body Listening and Not-Worrying on mental fatigue in psychotherapeutic and counselling approaches. Due to the exploratory nature of this study, the results are preliminary and need to be replicated in pre-registered trials with larger sample sizes., (© 2023. BioMed Central Ltd., part of Springer Nature.)

Major depressive disorder (MDD) is associated with dysfunctional self-reported interoception (i.e., abnormal perception of the body's physiological state) and systemic inflammation, both of which adversely affect treatment response. In this study, we explored associations between C-reactive protein (CRP) and self-reported interoception, to gain more insight into the pathophysiology of interoceptive impairments in MDD. We also aimed to replicate previous findings on the associations of depression and fatigue severity with CRP. The study included 97 depressed individuals, who completed self-administered questionnaires (Multidimensional Assessment of Interoceptive Awareness (MAIA-2); Beck Depression Inventory-II, Multidimensional Fatigue Inventory). CRP concentrations were analyzed in the serum using a particle-enhanced turbidimetric immunoassay. We applied Bayesian inference to estimate robust effect parameters from posterior distributions based on MCMC sampling, and computed Bayes factors (BF 10 ) as indices of relative evidence. The bivariate analysis supported evidence against associations between CRP and self-reported interoception (BF 10 ≤ 0.32), except for one dimension (Not-Distracting: r = 0.11, BF 10 > 0.43, absence of evidence). Positive correlations with overall depression (r = 0.21, BF 10 = 3.19), physical fatigue (r = 0.28, BF 10 = 20.64), and reduced activity (r = 0.22, BF 10 = 4.67) were found. The multivariate analysis showed moderate evidence that low-grade inflammation predicted higher scores on the MAIA-2 Not-Worrying scale (β = 0.28, BF 10 = 3.97), after controlling for relevant confounders. Inflammatory responses, as measured by CRP, may not be involved in the pathophysiology of dysfunctional self-reported interoception. However, systemic low-grade inflammation could potentially exert a protective effect against worries about pain or discomfort sensations. An immunological involvement in interoceptive impairments cannot be ruled out until future studies considering additional biomarkers of inflammation replicate our findings.

Background: Based on the concept of "Daseinsverabschiedung", an anthropological theory of "Anticipated Farewell to Existence" (AFE) was suggested on the basis of six grounding dimensions: selfhood, interpersonality, temporality, corporeality, worldliness, and transcendence, which are activated in a genuine manner facing death. The purpose of the study is to quantitatively compare the extent of confrontation with death between dying people in palliative care and those in other stages of life by means of the Anticipated Farewell to Existence Questionnaire" (AFEQT), based on these dimensions., Methods: The sample (N = 485) consists of dying individuals in palliative wards and hospices (n = 121); old people living in nursing homes not suffering from a mortal disease (n = 62); young adults (n = 152), and middle-aged adults (n = 150). The design is cross-sectional and analytical. The relevance of anticipated farewell to existence was measured by means of the AFEQT. The internal consistency of the AFEQT was assessed using Cronbach's alpha and convergent validity by means of dimensions of the Life Attitude Profile-Revised (LAP-R). Differences between groups and associations with control variables were estimated by means of multiple regression models, including propensity scores., Results: Cronbach's alpha for AFEQT was > 0.80 for the whole test and all subsamples, but < 0.70 for most dimensions in dying people. Correlations between each dimension and corresponding two factors was almost overall r > 0.80, p < 0.001. Good convergent validity between dimensions of AFEQT and of Life Attitude Profile-Revised in young and middle-aged participants showed correlations for superordinate indices between -0.23 and 0.72, and an overall p < 0.001. Dying people scored significantly higher for all dimensions, especially "altruistic preoccupation" and "reconciliation with existence" than people in other life stages (p < 0.01- < 0.001). Personality traits of "openness" and "agreeableness" are positively associated with higher scoring of AFEQT dimensions. About 77% of dying participants reported a personal benefit through the interview questions., Conclusions: With proximity to death, the anthropological dimensions proposed scored significant higher than in other stages of life, reflecting a stronger awareness, confrontation and reconciliation with the end of their own life. These dimensions, especially preoccupation for related persons and coexistence of acceptance and struggle with death have to be taken into account in a sensitive way by supporting dialogues with dying people and their relatives., Trial Registration: Observational cross-sectional study., (© 2021. The Author(s).)

Objectives: Interoception refers to the sensation, interpretation, and integration of internal somatic signals. Abnormalities in self-reported interoception are prevalent features of major depressive disorder (MDD) and may affect treatment outcomes. In the present study, we investigated the psychometric properties of the revised eight-dimensional and 37-item Multidimensional Assessment of Interoceptive Awareness questionnaire (the MAIA-2) in a severely depressed sample, after translating two updated scales (Not-Distracting, Not-Worrying) into German. Specifically, we examined the measure's internal consistency reliability, sensitivity to change, and minimal important differences (MID) with a focus on patient's antidepressive responses to treatment., Methods: The study enrolled 110 participants (age: M = 46.85, SD = 11.23; female: 55.45%) undergoing hospital treatment, of whom 87 were included in the pre-post analysis. Participants completed a German translation of MAIA-2 and the Beck Depression Inventory-II (pre-/post-treatment). Internal consistency reliability was determined by Cronbach's α/McDonalds's ω, sensitivity to change was determined by effect sizes, and MIDs were determined by distribution- (0.5*SD) and anchor-based approaches (mean change method; ROC curve cut-points)., Results: Depression severity reduced over the course of treatment (Median = -65.22%), and 34.48% of patients achieved remission. Reliability was appropriate for post-treatment (range of ω: .70-.90), but questionable for two pre-treatment scales (Noticing: ω = .64; Not-Distracting: ω = .66). The eight dimensions of MAIA-2 were sensitive to change (standardized response mean: .32-.81; Cohen's effect size: .30-.92). Distribution-based MIDs (.38-.61) and anchor-based mean change MIDs (remission vs. partial response: .00-.85; partial response vs. nonresponse: .08-.88) were established on the group level. For six scales, ROC cut-points (remission: .00-1.33; response: -.20-1.00) demonstrated accurate classification to treatment response groups on the individual level., Conclusions: This study demonstrated the applicability of the MAIA-2 questionnaire in MDD. The updated version may have led to reliability improvements regarding the revised scales, but subthreshold reliability was evident prior to treatment. The measure's dimensions were sensitive to change. MIDs were established that corresponded with antidepressive treatment outcomes. Our findings are consistent with a growing area of research which considers somatic feelings as key contributors to mental health., Competing Interests: The authors have declared that no competing interests exist.