Course of intellectual functioning in schizophrenia and bipolar disorder: a 10-year follow-up study

Parenting Experiences in the Context of Parental Bipolar Disorder: A Systematic Review and Meta-Synthesis of the Qualitative Literature

Parental bipolar disorder (BD) is associated with an increased risk of mental health problems in children. Despite the urgent need for clear guidance on how best to support parents with BD, current research lacks a unified analysis of the challenges and needs faced by these parents and their children. This review aims to explore the impact of BD on experiences of parent-child interactions or relationships to inform effective policies and interventions. Following a preregistered PROSPERO protocol, we searched Medline, Embase, PsycINFO, SCOPUS, and CINAHL for qualitative studies on parents with BD and their children (under 19 years) published since 1994. Each study was independently screened and jointly assessed for quality using the Critical Appraisal Skills Program. Our thematic synthesis entailed coding in NVivo, followed by collaborative theme generation on the Miro platform. We reviewed 19 studies, of which 9 studies reported on parents, 8 on children, and 2 on both parents and children. Our analysis generated four themes: (1) "The multifaceted landscape of parenting with BD," which outlines how mood swings affect parenting in diverse ways; (2) "The evolving dynamic of child-parent relationship amidst parental BD," including how children adapt and grow in understanding and responsibility in response to their parent's BD; (3) "The dual nature of childcare for parents with BD," which explores how childcare impacts parents' emotions and motivations, bringing both uplifting and challenging effects; (4) "Navigating parental challenges in the context of BD," highlighting the importance of open communication, self-reflection, and timely, unbiased support to mitigate challenges associated with parental BD. This qualitative synthesis focuses specifically on the parenting experiences of families affected by parental BD. It highlights the complex, dynamic impact of BD on parenting behaviors and children's coping mechanisms, calling for tailored therapeutic interventions that benefit both parents and children. The scope of our study is limited by factors such as a predominance of Western perspectives and an underrepresentation of fathers' experiences, highlighting the need for more diverse research in this area.

Ormerod MB, Aukrust P, Melle I, Steen NE, Andreassen OA, Ueland T. Longitudinal course of inflammatory-cognitive subgroups across first treatment severe mental illness and healthy controls

BACKGROUND

While inflammation is associated with cognitive impairment in severe mental illnesses (SMI), there is substantial heterogeneity and evidence of transdiagnostic subgroups across schizophrenia (SZ) and bipolar (BD) spectrum disorders. There is however, limited knowledge about the longitudinal course of this relationship.

METHODS

Systemic inflammation (C-Reactive Protein, CRP) and cognition (nine cognitive domains) was measured from baseline to 1 year follow-up in first treatment SZ and BD (n = 221), and healthy controls (HC, n = 220). Linear mixed models were used to evaluate longitudinal changes separately in CRP and cognitive domains specific to diagnostic status (SZ, BD, HC). Hierarchical clustering was applied on the entire sample to investigate the longitudinal course of transdiagnostic inflammatory-cognitive subgroups.

RESULTS

There were no case-control differences or change in CRP from baseline to follow-up. We confirm previous observations of case-control differences in cognition at both time-points and domain specific stability/improvement over time regardless of diagnostic status. We identified transdiagnostic inflammatory-cognitive subgroups at baseline with differing demographics and clinical severity. Despite improvement in cognition, symptoms and functioning, the higher inflammation - lower cognition subgroup (75% SZ; 48% BD; 38% HC) had sustained inflammation and lower cognition, more symptoms, and lower functioning (SMI only) at follow-up. This was in comparison to a lower inflammation - higher cognition subgroup (25% SZ, 52% BD, 62% HC), where SMI participants showed cognitive functioning at HC level with a positive clinical course.

CONCLUSIONS

Our findings support heterogenous and transdiagnostic inflammatory-cognitive subgroups that are stable over time, and may benefit from targeted interventions.

Shared and distinct structural brain alterations and cognitive features in drug-naïve schizophrenia and bipolar disorder

Our study aimed to examine the shared and distinct structural brain alterations, including cortical thickness(CT) and local gyrification index(LGI), and cognitive impairments between the early course stage of drug-naïve schizophrenia(SZ) and bipolar disorder(BD) patients when compared to healthy controls(HCs), and to further explore the correlation between altered brain structure and cognitive impairments. We included 72 SZ patients, 35 BD patients and 43 HCs. The cognitive function was assessed using the MATRICS Consensus Cognitive Battery. Cerebral cortex analyses were performed with FreeSurfer. Furthermore, any structural aberrations related to cognition impairments were examined. Cognitive impairments existed in SZ and BD patients and were much more severe and widespread in SZ patients, compared to HCs. There were no significant differences in LGI among three groups. Compared to HCs, SZ had thicker cortex in left pars triangularis, and BD showed thinner CT in left postcentral gyrus. In addition, BD showed thinner cortex in left pars triangularis, left pars opercularis, left insula and right fusiform gyrus compared to SZ. Moreover, our results indicated that CT in many brain areas were significantly correlated with cognitive function in HCs, but only CT of left pars triangularis was correlated with impaired social cognition found in SZ. The findings suggest that changes of CT in the left pars triangularis and left postcentral gyrus may be potential pathophysiological mechanisms of the cognition impairments in SZ and BD, respectively, and the divergent CT of partly brain areas in BD vs. SZ may help distinguish them in early phases.