Self-disgust mediates the relationship between childhood adversities and psychosis.

OBJECTIVE: Traumatic events in childhood have been implicated in the development of psychosis, but given that trauma is not in itself sufficient to cause psychosis, researchers have started to investigate other psychological constructs potentially involved in explaining this relationship. Given that self-disgust as a transdiagnostic construct plays a role in the development/maintenance of a range of mental health difficulties, the objective of this study was to investigate whether self-disgust mediates the relationship between childhood trauma and psychosis. METHOD: A cross-sectional quantitative study design was used. Seventy-eight participants (Mage  = 37.64 years, SDage  = 11.57 years; 77% women; 88% White Caucasian) who reported experiencing clinical levels of psychosis were recruited using social media. The participants completed online survey measures of childhood trauma, self-disgust, experiences of psychosis, self-esteem, and external shame. The data were analysed using correlation and mediation analyses. RESULTS: Significant indirect effects of childhood trauma on both positive (ß = .17, BC 95% CI [0.06, 0.30]) and negative symptoms (ß = .26, BC 95% CI [0.14, 0.40]) of psychosis via self-disgust were observed. These effects remained despite the inclusion of self-esteem and external shame as control variables in the mediation models. CONCLUSION: This study is the first to show a mediating role for self-disgust in the relationship between childhood trauma and later psychosis. Although the findings should be considered preliminary until strengthened by further research, they nevertheless provide corroboration of the potential utility of self-disgust as a transdiagnostic construct not only from a theoretical perspective, but also from its potential to inform formulation and interventions. PRACTITIONER POINTS: When assessing individuals with psychosis, especially those with a trauma history explore experiences and feelings related to the construct of self-disgust. Such experiences are likely to centre on feelings of repulsion towards the self/need for distance and might also manifest in the content of their psychotic experiences. Individuals with significant levels or experiences of self-disgust are likely to need specific interventions to address these; while interventions seeking to improve positive aspects of their identity might well be useful, they are unlikely to address the specific maladaptive elements of self-disgust. While self-disgust-focused interventions have not been widely researched, limited current evidence suggests cognitive restructuring and affirmation techniques might be useful.

A systematic review of the clinical utility of the concept of self-disgust.

This systematic literature review examined the clinical utility of the construct of self-disgust in understanding mental distress. Specifically, the review assessed whether there is a shared conceptual definition of self-disgust, the face and construct validity of the quantitative assessment measures of self-disgust, and the predictive validity of self-disgust in formulating the development of a range of psychological difficulties. A systematic database search supplemented by manual searches of references and citations identified 31 relevant papers (27 quantitative, 3 qualitative, and 1 mixed). Analysis of qualitative papers indicated a number of shared features in the definition of self-disgust, including a visceral sense of self-elicited nausea accompanied by social withdrawal and attempts at cleansing or suppressing aspects of the self. Quantitative assessment measures appeared to capture these dimensions and evidenced good psychometric properties, although some measures may have only partially captured the full self-disgust construct. Strong relationships were observed between self-disgust and a range of mental health presentations, in particular, depression, body-image difficulties, and trauma-related difficulties. However, these relationships are smaller when the effects of other negative self-referential emotions were controlled, and stronger conclusions about the predictive validity of self-disgust are limited by the cross-sectional nature of many of the studies.

A meta-analysis of cognitive impairment following adult cancer chemotherapy.

OBJECTIVE: Chemotherapy-induced cognitive impairments are reported by many cancer survivors. Research to date has not provided a clear description of their nature, extent, mechanisms, and duration. To investigate the impairments and factors that could influence their identification and severity, the present meta-analysis brings together research on this topic in adult cancer patients. METHOD: Our random-model meta-analysis includes 44 studies investigating the cognitive performance of adults treated with chemotherapy for non-central nervous system malignancies, primarily breast and testicular cancer. We conducted several subgroup analyses to identify the level of cognitive impairments in longitudinal and cross-sectional studies. We also pursued several multilevel model regressions to investigate the impact of methodological (study quality) and clinical moderators (diagnosis, age, time since treatment) on the observed effect sizes. RESULTS: Cognitive impairments were found in cross-sectional studies in immediate free recall, delayed memory, verbal memory, delayed recognition memory, selective attention, and attention capacity. Surprisingly, prior to chemotherapy, patients performed better than matched controls. In longitudinal studies, patients' performance increased from baseline to follow-up, an effect that was stronger in patients than controls. None of the chosen moderators influenced the magnitude of estimated summary effect sizes. CONCLUSIONS: The likelihood to identify impairments rests on the type of design employed, as memory and attention impairments are only detected in cross-sectional studies. We discuss the lack of significant impact of moderators on the effect sizes despite the heterogeneity of results, while providing recommendations toward decreasing the heterogeneity in future studies.