Cortical abnormalities in bipolar disorder: an MRI analysis of 6503 individuals from the ENIGMA Bipolar Disorder Working Group.

Despite decades of research, the pathophysiology of bipolar disorder (BD) is still not well understood. Structural brain differences have been associated with BD, but results from neuroimaging studies have been inconsistent. To address this, we performed the largest study to date of cortical gray matter thickness and surface area measures from brain magnetic resonance imaging scans of 6503 individuals including 1837 unrelated adults with BD and 2582 unrelated healthy controls for group differences while also examining the effects of commonly prescribed medications, age of illness onset, history of psychosis, mood state, age and sex differences on cortical regions. In BD, cortical gray matter was thinner in frontal, temporal and parietal regions of both brain hemispheres. BD had the strongest effects on left pars opercularis (Cohen's d=-0.293; P=1.71 × 10-21), left fusiform gyrus (d=-0.288; P=8.25 × 10-21) and left rostral middle frontal cortex (d=-0.276; P=2.99 × 10-19). Longer duration of illness (after accounting for age at the time of scanning) was associated with reduced cortical thickness in frontal, medial parietal and occipital regions. We found that several commonly prescribed medications, including lithium, antiepileptic and antipsychotic treatment showed significant associations with cortical thickness and surface area, even after accounting for patients who received multiple medications. We found evidence of reduced cortical surface area associated with a history of psychosis but no associations with mood state at the time of scanning. Our analysis revealed previously undetected associations and provides an extensive analysis of potential confounding variables in neuroimaging studies of BD.

Using a treatment partner and text messaging to improve adherence to psychotropic medication: a qualitative formative study of service users and caregivers in Cape Town, South Africa.

OBJECTIVE: Poor adherence to medications, including psychotropic medications contributes to the burden of disease. Mental health service users (MHSU) may also not attend follow-up appointments at their health care facilities where they could discuss adherence with their health care provider. This paper reports on preliminary qualitative research preceding a randomised controlled trial that aims to improve adherence to psychotropic medication and to follow up treatment visits. The intervention will entail the support of individuals with serious mental disorder by a treatment partner and short message service (SMS) text messaging. METHODS: The preliminary research reported in this paper aimed to extract views about the intervention from both mental health service users (MHSU) and caregivers through focus group discussions and individual interviews. Data were analysed using ATLAS TI qualitative software. RESULTS: The caregivers interviewed were all mothers of MHSU who took measures to encourage adherence. They held mixed opinions on whether the treatment partner should be a family member. Most participants expressed the view that due to living conditions, family members were natural treatment partners, but others stated that they would prefer a treatment partner who was not a family member. Similarly, while most MHSU supported the idea of a treatment partner, a minority were concerned that a treatment partner may potentially be too controlling and compromise their autonomy. The vast majority of participants supported SMS text messaging as a means of reminding MHSU to take their medication and attend follow-up appointments. One participant mentioned the importance of broader social inclusion issues that should be incorporated in the intervention. CONCLUSION: Qualitative research may provide useful insights for the design of interventions of this nature related to social inclusion randomised control trials with its focus on adherence.

Monitoring the prevalence of methamphetamine-related presentations at psychiatric hospitals in Cape Town, South Africa.

OBJECTIVE: This study aimed to determine a demographic profile of methamphetamine (MA)-related admissions to major psychiatric services in Cape Town, obtain a substance use profile from admitted patients, a profile of common MA-related symptoms encountered during the assessment of the patients presenting with MA-related problems, and a brief profile of the psychiatric diagnoses made. METHOD: Staff in six psychiatric hospitals or wards in Cape Town collected data on methamphetamine related admissions between July and December 2008 using a one-page record review form. The data collection form consisted of the patient's demographic details, presenting symptoms, previous admission details, current MA and other substance use information, and DSM-IV diagnosis. RESULTS: A total of 235 forms were completed. Most patients were male (69%) and the mean age was 25 years. The most common presenting symptoms were aggressive behaviour (74%), followed by delusions (59%) and hallucinations (57%). Males were two times more likely to present with aggression as compared to females, while females were significantly more likely to present with depressed mood or euphoric/elevated mood. The majority of patients had substance-induced psychotic disorder (41%), followed by schizophrenia (31%). Twelve percent (12%) had bipolar mood disorder. CONCLUSION: MA-related psychiatric admissions pose serious challenges to all health services dealing with these patients. Further training and treatment protocol development and distribution is indicated.

The prevalence and correlates of hallucinations in a general population sample: findings from the South African Stress and Health Study.

OBJECTIVE: Large epidemiological surveys conducted in the developed world have found rates of psychotic symptoms in the general population to be as high as 10-28%. However, there are few data available from developing countries, including African countries, on the prevalence and correlates of psychotic symptoms. This study investigates the prevalence and correlates of psychotic symptoms (ie hallucinations) in a general population sample of South African adults. METHOD: As part of the South African Stress and Health Study the prevalence of auditory and visual hallucinations was determined in a large community based sample of 4250 participants utilizing the Composite International Diagnostic Interview (CIDI). In addition, socio-demographic and clinical correlates as well as indicators of service utilization and functional impairment were determined. RESULTS: The prevalence of any reported hallucination was 12.7%, a rate comparable to that found in studies from the developed world. Multivariate analyses revealed a significant association between role impairment, service utilisation, suicidality and reported auditory or visual hallucinations. No significant association was found between urbanicity and reported psychotic symptoms. CONCLUSION: Our finding that psychotic symptoms (ie hallucinations) are significantly associated with functional impairment and service utilization supports the potential clinical significance of such symptoms, even in the African context.