Does It Matter What Screener We Use? A Comparison of Ultra-brief PHQ-4 and E-mwTool-3 Screeners for Anxiety and Depression Among People With and Without HIV.

The burden of depression and anxiety disorders is high in sub-Saharan Africa, especially for people with HIV (PWH). The Patient Health Questionnaire-4 (PHQ-4) and Electronic Mental Wellness Tool-3 (E-mwTool-3) are ultra-brief screening tools for these disorders. We compared the performance of PHQ-4 and E-mwTool-3 for screening MINI-International Neuropsychiatric Interview diagnoses of depression and anxiety among a sample of individuals with and without HIV in two primary care clinics and one general hospital in Maputo City, Mozambique. Areas-under-the-curve (AUC) were calculated along with sensitivities and specificities at a range of cutoffs. For PWH, at a sum score cutoff of ≥ 1, sensitivities were strong: PHQ-4:Depression = 0.843; PHQ-4:Anxiety = 0.786; E-mwTool-3:Depression = 0.843; E-mwTool-3:Anxiety = 0.929. E-mwTool-3 performance was comparable to PHQ-4 among people with and without HIV.

Comparative assessment of iridium oxide and platinum alloy wires using an in vitro glial scar assay.

The long-term effect of chronically implanted electrodes is the formation of a glial scar. Therefore, it is imperative to assess the biocompatibility of materials before employing them in neural electrode fabrication. Platinum alloy and iridium oxide have been identified as good candidates as neural electrode biomaterials due to their mechanical and electrical properties, however, effect of glial scar formation for these two materials is lacking. In this study, we applied a glial scarring assay to observe the cellular reactivity to platinum alloy and iridium oxide wires in order to assess the biocompatibility based on previously defined characteristics. Through real-time PCR, immunostaining and imaging techniques, we will advance the understanding of the biocompatibility of these materials. Results of this study demonstrate iridium oxide wires exhibited a more significant reactive response as compared to platinum alloy wires. Cells cultured with platinum alloy wires had less GFAP gene expression, lower average GFAP intensity, and smaller glial scar thickness. Collectively, these results indicated that platinum alloy wires were more biocompatible than the iridium oxide wires.

The impact of COVID-19 on self-reported burnout and health and mental health services in Nampula, Mozambique.

Background: The purpose of this study was to examine the impact of the COVID-19 pandemic on self-reported burnout of health workers, quality of care, and perceptions of COVID-19-related stigma in Mozambique. Method: We conducted a cross-sectional quantitative assessment of 170 frontline health workers in Nampula District, Mozambique, including 149 (87.6%) primary care providers and 21 (12.4%) mental health specialists. Results: Of the 170 frontline workers, only 10.1% of frontline workers were experiencing more professional burnout, whereas 33.3% felt it had lessened. The perceived impact on quality of care also varied, without any significant differences by sex, education level, or mental health training background. Compared to the beginning of the COVID-19 pandemic in March 2020, 42.3 and 38.1% providers felt that their ability to provide mental health and general health care, respectively, had worsened, compared to 57.7 and 61.9% who believed that either there was no change, or that the work had become easier. Likewise, 26.8% of providers felt that their ability to meet patients' needs had gotten more difficult, whereas 43.4% reported no change and 29.8% reported that it was easier. Twenty-two percent of providers reported an overall increase in caseloads since before the pandemic whereas the majority (67.9%) reported a decrease. Providers believed that 57.1% of people in general were afraid of people with COVID-19, 27.5% were afraid of a person recovered from COVID-19, and 39.9% were afraid of a person with family members with COVID-19. The perceived stigma about healthcare professionals was also low; only 27.4% believed that people in general were afraid of healthcare providers who deliver care to people with COVID-19. Conclusion: In contrast with other global studies, many healthcare workers in our sample reported a reduction in burnout, which may be associated with the lower overall caseloads seen during this period. Similarly, the quality of care was minimally impacted. More research is needed to determine whether the experience in Mozambique is unique, or similarly observed in other low-resource settings.

Women's mental health in Mozambique: is maternity a protective factor?

Backgroud: Globally, women have been shown to have high rates of common mental disorders (CMDs). In low and middle-income countries (LMICs), women face significant challenges related to maternity. However, no study has compared mental health problems among pregnant/post-partum women, childless women of childbearing age, and women with children in a low-income country. We sought to compare the frequency of CMD and suicide risk in a sample of women presenting or accompanying patients in primary care in two Mozambican semi-urban settings. Methods: We administered the MINI International Neuropsychiatric Interview to 853 women, of whom 220 (25.8%) were pregnant/post-partum, 177 (20.8%) were non-pregnant and childless, and 456 (53.5%) were non-pregnant and with children more than 1-year-old. Logistic regression models compared the likelihood of a psychiatric disorder across groups, adjusting for sociodemographic and chronic-illness covariates. Results: We found a high frequency of CMD and suicide risk among all women in this low-income context sample. In adjusted models, no differences in rates of depression, anxiety, or panic disorder were observed among groups. However, suicide risk was higher in women without children than pregnant/post-partum women. Conclusion: The frequency of CMD among women of childbearing age in our study was higher than documented rates in high-income countries and other LMIC. Additionally, we found that motherhood was not protective and that pregnancy and the postpartum period were not stages of increased risk for most disorders. This highlights the need to expand mental health services not only for perinatal women but all women of childbearing age in this and possibly similar settings.

Brief Screening Tool for Stepped-Care Management of Mental and Substance Use Disorders.

OBJECTIVE: Stepped mental health care requires a rapid method for nonspecialists to detect illness. This study aimed to develop and validate a brief instrument, the Mental Wellness Tool (mwTool), for identification and classification. METHODS: Cross-sectional development and validation samples included adults at six health facilities in Mozambique. Mini International Neuropsychiatric Interview diagnoses were the criterion standard. Candidate items were from nine mental disorder and functioning assessments. Regression modeling and expert consultation determined best items for identifying any mental disorder and classifying positives into disorder categories (severe mental disorder, common mental disorder, substance use disorder, and suicide risk). For validation, sensitivity and specificity were calculated for any mental disorder (index and proxy respondents) and disorder categories (index). RESULTS: From the development sample (911 participants, mean±SD age=32.0±11 years, 63% female), 13 items were selected-three with 0.83 sensitivity (95% confidence interval [CI]=0.79-0.86) for any mental disorder and 10 additional items classifying participants with a specificity that ranged from 0.72 (severe mental disorder) to 0.90 (suicide risk). For validation (453 participants, age 31±11 years, 65% female), sensitivity for any mental disorder was 0.94 (95% CI=0.89-0.97) with index responses and 0.73 (95% CI=0.58-0.85) with family proxy responses. Specificity for categories ranged from 0.47 (severe mental disorder) to 0.93 (suicide risk). Removing one item increased severe mental disorder specificity to 0.63 (95% CI=0.58-0.68). CONCLUSIONS: The mwTool performed well for identification of any mental disorder with index and proxy responses to three items and for classification into treatment categories with index responses to nine additional items.

Influence of nanoscale surface roughness on neural cell attachment on silicon.

The adherence and viability of neural cells (primary cortical cells) from rat embryo on silicon wafers with varying surface roughness (10 to 250 nm) at the nano scale were investigated. The roughnesses were achieved by using chemical etching. Atomic force microscopy was utilized to determine surface roughness. We examined the adherence and viability of neural cells by using scanning electron microscopy and fluorescence immunoassaying. Antineuron-specific enolase antibody was used for immunostaining. Results from this investigation show that for these specific neural cells, there is an optimum surface roughness range, R(a) = 20 to 100 nm, that promotes cell adhesion and longevity. For silicon-based devices, this optimum surface roughness will be desirable as a suitable material/neuron interface.

Characterization of astrocyte reactivity and gene expression on biomaterials for neural electrodes.

Neural electrode devices hold great promise to help people with the restoration of lost functions. However, research is lacking in the biomaterial design of a stable, long-term device. Glial scarring is initiated when a device is inserted into brain tissue and an inflammatory response ensues. Astrocytes become hypertrophic, hyperplastic, and upregulate glial-fibrillary acidic protein. This study was designed to investigate the astrocyte proliferation, viability, morphology, and gene expression to assess the reactive state of the cells on different material surfaces. Although platinum and silicon have been extensively characterized both in vivo and in vitro for their biocompatibility with neuronal cells, this study used the novel usage of PMMA and SU-8 in neural electrodes by comparative analysis of materials' biocompatibility. This study has shown evidence of noncytotoxicity of SU-8. We have also confirmed the biocompatibility of PMMA with astrocytes. Moreover, we have established sound guidelines of which neural implant materials should meet to be depicted biocompatible.

A comprehensive review of surface modification for neural cell adhesion and patterning.

This comprehensive literature review covers recent studies on patterning neuronal cells by topographical modifications on material surfaces targeted for neural prostheses. We explore different materials that are used as the candidate surface for neuronal cell adhesion. Cell-material interactions are identified in both cases where the material surface was in direct contact with cells and where the materials were coated to facilitate cell adhesion. Commonly used coating materials and coating methods are discussed. The existing hypotheses behind mechanism of the response of neuronal cells to a specific topography are presented briefly. A few selected important studies have been presented to show the range of techniques employed and the extent of the research area.

A neural cell culture study on thin film electrode materials.

Functional neural stimulation requires good interface between the neural cells and the electrode surfaces. In order to study the effect of electrode materials and surface structure on cell adhesion and biocompatibility, we cultured cortical neurons on thin films of platinum and iridium oxide. We used both flat, as-deposited and laser micro-structured films. The laser micro-structuring consisted of creating regular arrays of micro-bumps or holes with diameters of 4-5 mum and height of about 1.5 mum. The micro-bumps were fabricated onto platinum and iridium film surfaces deposited on borosilicate glass substrates, using mask-projection irradiation with single nano-second pulses from a KrF excimer laser (lambda = 248 nm). Amorphous and crystalline (deposited at 250 degrees C) IrO(2) films were deposited onto the laser micro-structured iridium films by pulsed-DC reactive sputtering to obtain micro-structured IrO(2) films. Cortical neurons isolated from rat embryo brain were cultured onto these film surfaces. Our results indicate that flat and micro-structured film surfaces are biocompatible and non-toxic for neural cell growth. The use of poly-D: -lysine as a mediator for cell adhesion onto the thin film surfaces is also discussed.