Nevin Manimala

Psychol Med. 2022 Nov 9:1-12. doi: 10.1017/S0033291722003427. Online ahead of print.

ABSTRACT

Interpretation bias (i.e. the selective negative interpretation of ambiguous stimuli) may contribute to the development and maintenance of health anxiety. However, the strength of the empirical evidence for this association remains a topic of debate. This study aimed to estimate the association between health anxiety and interpretation bias and to identify potential moderators of this association. Chinese-language databases (CNKI, VIP, and Wanfang), English-language databases (Web of Science, PubMed, PsycINFO, and Scopus), and German-language databases (Psyndex and PubPsych) were searched for relevant studies. There were 36 articles (39 studies) identified by this search (N = 8984), of which 32 articles (34 studies) were included in the meta-analysis (N = 8602). Results revealed a medium overall effect size (g = 0.67). Statistically equivalent effect sizes were observed for patients diagnosed with clinical health anxiety (g = 0.58) and subclinical health anxiety (g = 0.72). The effect sizes for threat stimuli that were health related (g = 0.68) and not health related (g = 0.63) did not differ significantly. The effect size for studies using an offline paradigm (g = 0.75) was significantly higher than that for studies using an online paradigm (g = 0.50). It is concluded that health anxiety is significantly and robustly associated with interpretation bias. These findings are of central importance for the advancement of models and treatment of health anxiety.

PMID:36349699 | DOI:10.1017/S0033291722003427

J Int Adv Otol. 2022 Nov;18(6):522-529. doi: 10.5152/iao.2022.21503.

ABSTRACT

BACKGROUND: The aim of this study is to observe the application of the Chinese version of Tinnitus Handicap Inventory-China in Tinnitus patients and verify its reliability and validity.

METHODS: About 1129 patients with tinnitus as the first complaint were selected as subjects. The patients were randomly divided into 2 groups: exploration group (n = 565), whose data were analyzed with reliability analysis method using Statistical Package for the Social Sciences software 19.0, validation group (n = 564), whose data were analyzed with validity analysis method using AMOS21.0.

RESULTS: (1) Reliability test: The Cronbach’s α coefficients of the Tinnitus Handicap Inventory-China scale in both groups were 0.94, among which, the Cronbach’s α coefficients of functional factor (F), emotion factor (E), and catastrophic factor (C) in group E were 0.87, 0.90, and 0.78, respectively. The half-reliability of the 2 components is 0.87. The correlation coefficient between items and the scale in group E and group V is 0.36-0.78 and 0.33-0.77, respectively. (2) Content validity: The Kaiser-Meyer-Olkin value of group E is 0.96, a total of 4 common factors were extracted, and the cumulative interpretation rate is 57.844%. The number of factors with load less than 0.4 on the 4 common factors is only 1 (F24), suggesting that this factor had little significance; the number of factors with load more than 0.4 on the 2 common factors is 8 (F1, E6, F9, C11, F15, E21, E22, and C23), suggesting that patients had different understandings of these 8 questions. (3) Structural validity: The root mean square error of approximation value of the AMOS structural model in group V is 0.065, and the root mean square residual value is 0.114, indicating low fitness; the NC value is 3.353, indicating good fitness of the scale, but it still needed to be simplified.

CONCLUSION: The Chinese version of Tinnitus Handicap Inventory-China has a high reliability when applied in China, but the content validity and structure validity are not high, and the clinical practicability needs to be improved.

PMID:36349675 | DOI:10.5152/iao.2022.21503

J Int Adv Otol. 2022 Nov;18(6):471-477. doi: 10.5152/iao.2022.21639.

ABSTRACT

BACKGROUND: The measurement of low-frequency cubic distortion product otoacoustic emission, for example, 0.5-kHz cubic distortion product otoacoustic emission, is often severely affected by background noise, and currently 0.5-kHz cubic distortion product otoacoustic emission is not commonly applicable in clinical setting.

METHODS: The fundamental part of current study was the optimization of recording technology to reduce noise interference with the measurement of 0.5-kHz cubic distortion product otoacoustic emission and to establish the response patterns of cubic distortion product otoacoustic emission across speech frequencies from 0.5 to 8kHz in the presence of normal hearing and noise-induced hearing loss.

RESULTS: After a series of optimization, a clinically applicable technology of measuring 0.5-kHz cubic distortion product otoacoustic emission was successfully completed via animal model. Cubic distortion product otoacoustic emission was recorded in 6 guinea pigs across speech frequencies from 0.5 to 8kHz before and after exposure to white bandnoise between 0.5 and 2 kHz. After noise exposure, significant reduction in the signal-to-noise ratio of cubic distortion product otoacoustic emission was found at 0.5 and 2 kHz, indicating our recording technology was sensitive and accurate. Other interesting finding was the reduction in cubic distortion product otoacoustic emiss ion-s ignal -to-n oise ratio at 4 and 6 kHz although the reduction was not statistically significant probably because of short exposure time. The result implied that the damaging effect induced by low-frequency noise exposure might spread upward to high-frequency region.

CONCLUSIONS: Our recording technology was stable and reliable and had the great potentiality to be used in clinical setting.

PMID:36349667 | DOI:10.5152/iao.2022.21639

J Affect Disord. 2022 Oct 28;321:217-226. doi: 10.1016/j.jad.2022.10.044. Online ahead of print.

ABSTRACT

BACKGROUND: We estimate 30-day prevalence of 11 common mental disorders among a representative sample of university students in South Africa and explore disparities in student mental health across historically segregated institutions and marginalised groups.

METHODS: Cross-sectional data collected in self-report surveys of students (n = 28,268) from 17 universities were weighted to adjust for differences in survey responses. Poisson regression was used to estimate risk ratios (RRs).

RESULTS: Prevalence estimates were highest (21.0-24.5 %) for two anxiety disorders (social anxiety disorder, PTSD) and two disruptive behavior disorders (eating disorder, ADHD). Prevalence estimates were higher for any anxiety disorder (37.1 %) and any disruptive behavior disorder (38.7 %) than for any mood disorder (16.3 %) or any substance use disorder (6.6 %). Prevalence estimates varied significantly by historical segregation status of institutions (F₃ = 221.6, p < .001), with prevalence consistently highest in Historically White Institutions (HWIs). Across all institutions, risk of any disorder was lower among oldest than younger students (RR = 0.7, 95%CI = 0.7-0.8), and elevated among gender non-conforming (RR = 1.3, 95%CI = 1.1-1.4), female (RR = 1.2, 95%CI = 1.1-1.2), and sexual minority (RR = 1.2, 95%CI = 1.2-1.3) students. Black students attending HWIs had elevated risk of any disorder relative to White students.

LIMITATIONS: Reliance on self-report measures together with relatively low and variable response rates across institutions limit generalizability of results.

CONCLUSIONS: Modest risks associated with sociodemographic factors suggest a need to focus on mental health of female, gender nonconforming and sexual minority students at all universities along with Black students attending HWIs.

PMID:36349649 | DOI:10.1016/j.jad.2022.10.044

Int Health. 2022 Nov 9:ihac071. doi: 10.1093/inthealth/ihac071. Online ahead of print.

ABSTRACT

BACKGROUND: Globally, maternal and neonatal health remains a public health priority, particularly for resource-constrained regions like sub-Saharan Africa (SSA). Skilled birth attendance (SBA) is essential in promoting maternal and neonatal health. This study investigated the inequalities in the prevalence of SBA in Ghana using data from the Ghana Demographic and Health Survey (GDHS) between 1993 and 2014.

METHODS: Data were analysed using the World Health Organization’s Health Equity Assessment Toolkit software. In analysing the data, we first disaggregated SBA by four inequality stratifiers: wealth index, education, residence, and region. Second, we measured the inequality through summary measures, namely difference, population attributable risk, ratio, and population attributable fraction. A 95% confidence interval was constructed for point estimates to measure statistical significance.

RESULTS: Throughout the period, SBA was highest among women in the highest wealth quintile and those with a secondary or higher level of education. The analysis also indicated that SBA was highly concentrated among urban residents in 1993 (80.78 [95% uncertainty interval {UI} 76.20-84.66]) and persisted to 2014 (91.55 [95% UI 88.80-93.68]). In 1993, Northern region recorded the lowest prevalence of SBA in Ghana (15.69 [95% UI 11.20-21.54]) and the region consistently recorded the lowest SBA prevalence even into 2014 (38.21 [95% UI 27.44-50.27]).

CONCLUSIONS: There are significant inequalities in SBA across education, wealth, residence, and region in Ghana. To enhance SBA, there is the need for policymakers and interventionists to design and develop targeted policies and programs that are tailored to the needs of the subpopulations at risk of low SBA: women with no formal education, those within the poorest wealth quintile, rural-dwelling women and women in the Northern region. This will facilitate the uptake of SBA and ultimately translate into the realization of Sustainable Development Goals 3.1 and 3.2.

PMID:36349614 | DOI:10.1093/inthealth/ihac071

Neuroimage. 2022 Oct 27;264:119703. doi: 10.1016/j.neuroimage.2022.119703. Online ahead of print.

ABSTRACT

Quantifying the volume of the cerebellum and its lobes is of profound interest in various neurodegenerative and acquired diseases. Especially for the most common spinocerebellar ataxias (SCA), for which the first antisense oligonculeotide-base gene silencing trial has recently started, there is an urgent need for quantitative, sensitive imaging markers at pre-symptomatic stages for stratification and treatment assessment. This work introduces CerebNet, a fully automated, extensively validated, deep learning method for the lobular segmentation of the cerebellum, including the separation of gray and white matter. For training, validation, and testing, T1-weighted images from 30 participants were manually annotated into cerebellar lobules and vermal sub-segments, as well as cerebellar white matter. CerebNet combines FastSurferCNN, a UNet-based 2.5D segmentation network, with extensive data augmentation, e.g. realistic non-linear deformations to increase the anatomical variety, eliminating additional preprocessing steps, such as spatial normalization or bias field correction. CerebNet demonstrates a high accuracy (on average 0.87 Dice and 1.742mm Robust Hausdorff Distance across all structures) outperforming state-of-the-art approaches. Furthermore, it shows high test-retest reliability (average ICC >0.97 on OASIS and Kirby) as well as high sensitivity to disease effects, including the pre-ataxic stage of spinocerebellar ataxia type 3 (SCA3). CerebNet is compatible with FreeSurfer and FastSurfer and can analyze a 3D volume within seconds on a consumer GPU in an end-to-end fashion, thus providing an efficient and validated solution for assessing cerebellum sub-structure volumes. We make CerebNet available as source-code (https://github.com/Deep-MI/FastSurfer).

PMID:36349595 | DOI:10.1016/j.neuroimage.2022.119703

Biol Sex Differ. 2022 Nov 8;13(1):66. doi: 10.1186/s13293-022-00468-6.

ABSTRACT

BACKGROUND: Dysregulation in the prefrontal cortex underlies a variety of psychiatric illnesses, including substance use disorder, depression, and anxiety. Despite the established sex differences in prevalence and presentation of these illnesses, the neural mechanisms driving these differences are largely unexplored. Here, we investigate potential sex differences in glutamatergic transmission within the medial prefrontal cortex (mPFC). The goal of these experiments was to determine if there are baseline sex differences in transmission within this region that may underlie sex differences in diseases that involve dysregulation in the prefrontal cortex.

METHODS: Adult male and female C57Bl/6J mice were used for all experiments. Mice were killed and bilateral tissue samples were taken from the medial prefrontal cortex for western blotting. Both synaptosomal and total GluA1 and GluA2 levels were measured. In a second set of experiments, mice were killed and ex vivo slice electrophysiology was performed on prepared tissue from the medial prefrontal cortex. Spontaneous excitatory postsynaptic currents and rectification indices were measured.

RESULTS: Females exhibit higher levels of synaptosomal GluA1 and GluA2 in the mPFC compared to males. Despite similar trends, no statistically significant differences are seen in total levels of GluA1 and GluA2. Females also exhibit both a higher amplitude and higher frequency of spontaneous excitatory postsynaptic currents and greater inward rectification in the mPFC compared to males.

CONCLUSIONS: Overall, we conclude that there are sex differences in glutamatergic transmission in the mPFC. Our data suggest that females have higher levels of glutamatergic transmission in this region. This provides evidence that the development of sex-specific pharmacotherapies for various psychiatric diseases is important to create more effective treatments.

PMID:36348414 | DOI:10.1186/s13293-022-00468-6

Thromb J. 2022 Nov 8;20(1):67. doi: 10.1186/s12959-022-00427-6.

ABSTRACT

BACKGROUND: The relationship between vascular endothelial growth factor (VEGF) and the risk of venous thromboembolism (VTE) has always been one of the concerns in the medical field. However, the causal inferences from published observational studies on this issue may be affected by confounders or reverse causality. We performed a two-sample bidirectional Mendelian randomization (MR) to infer the associations between VEGF and VTE.

METHODS: Summary statistics from genome-wide association studies (GWAS) for VEGF and VTE were obtained from published meta-analysis studies and the FinnGen consortium, respectively. Independent genetic variables significantly associated with exposure were selected as instrumental variables. Linkage disequilibrium score regression (LDSC) and five robust MR analytical approaches were conducted to estimate the genetic correlations and causal inference. The MR-Egger intercept, Cochran’s Q, and MR pleiotropy residual sum and outlier (MR-PRESSO) were performed to evaluate the horizontal pleiotropy, heterogeneities, and stability of these genetic variants on outcomes. Notably, replication analyses were performed using different subgroups of VTE.

RESULTS: LDSC failed to identify genetic correlations between VEGF and VTE. Based on 9 SNPs, the circulating VEGF level was positively related to the risk of VTE using inverse variance weighting (IVW) method (odds ratio (OR) = 1.064, 95% confidence interval (CI), 1.009-1.122). Reverse MR analyses showed that genetic liability for VTE was not associated with increased VEGF level (β = -0.021, 95% CI, -0.087-0.045). Pleiotropy-robust methods indicated no bias in any estimates.

CONCLUSIONS: Our findings failed to detect coheritability between VEGF and VTE. The suggestive positive effect of the higher VEGF level on the VTE risk may have clinical implications, suggesting that VEGF as a possible predictor and therapeutic target for VTE prevention need to be further warranted.

PMID:36348399 | DOI:10.1186/s12959-022-00427-6

BMC Oral Health. 2022 Nov 9;22(1):477. doi: 10.1186/s12903-022-02497-4.

ABSTRACT

BACKGROUND AND AIMS: Spondyloarthritis (SpA) is a group of autoinflammatory disorders, of which the primary extra-articular manifestation is inflammatory bowel disease (IBD). The oral cavity being a part of gastrointestinal tract, is significantly compromised in IBD, and in many cases, it is the first site of clinical manifestations of IBD. This study aimed to identify changes in the oral mucosa associated with the onset of IBD and their association with endoscopic/histological findings.

MATERIALS AND METHODS: The study assessed 80 patients with SpA and 52 healthy controls. Oral, rheumatological, and gastroenterological assessments were performed. The ileocolonoscopy was performed via digital magnification chromoendoscopy. The statistical analysis consisted of Chi-square, Fisher’s exact, and multiple correspondence discriminant analysis tests.

RESULTS: From the disease cohort, 63.0% patients showed oral lesions (p = 0.050). These manifestations ranged from gingivitis (55.0%, p = 0.001), aphthous stomatitis (3.8%, p = 0.091), angular cheilitis (2.6%, p = 0.200), and perioral erythema with scaling (1.3%, p = 0.300). All patients who presented with alterations in colonic mucosa also had oral lesions associated with IBD (p = 0.039), specifically gingivitis/aphthous stomatitis (p = 0.029).

CONCLUSION: The patients with SpA without IBD present significant oral signs and symptoms. Gingivitis seems to be the most relevant because of its associations with early endoscopic and histological findings.

CLINICAL RELEVANCE: An integral approach to the diagnostic tests that includes evaluations of oral, rheumatological and gastroenterological tissues may favor timely attention and improve patients’ quality of life.

PMID:36348398 | DOI:10.1186/s12903-022-02497-4

BMC Med Educ. 2022 Nov 8;22(1):766. doi: 10.1186/s12909-022-03813-w.

ABSTRACT

BACKGROUND: The effectiveness of online classes is always a concern, and it can be overcome by opting for active learning strategies like team-based learning (TBL). This study was conducted to find out the effectiveness of online TBL as an active learning strategy. We also aimed to explore the satisfaction and perception of students toward TBL.

METHODS: This is a mixed-method study conducted among 29 third-year Bachelor of Medicine and Bachelor of Surgery (MBBS) students of Gandaki Medical College using purposive sampling method in the duration of January to September 2021. Three two hours online TBL sessions were used for teaching introduction to medical ethics. The individual readiness assurance test (IRAT) scores were compared to the group readiness assurance test (GRAT) scores to evaluate the effect of TBL through cooperative learning. Learner reactions and satisfaction of students towards TBL were assessed using a validated questionnaire comprising of a five-point Likert scale. An open-ended question asking the participants to describe their overall experience of the TBL sessions was also included to explore their perceptions towards TBL. The data were collected using Google form and exported to Microsoft Excel and the quantitative data were then analyzed using Statistical Package for Social Sciences (SPSS) version 16.0. To check the normal distribution of the data, Kolmogorov Smirnov and Shapiro-Wilk test were used. Non-parametric tests were used for the non-normally distributed data. P value of < 0.05 was regarded as significant. Thematic analysis was conducted for the qualitative data.

RESULTS: The median GRAT scores were significantly higher (p = 0.006 in TBL 1 and 0.001 in TBL 2) than IRAT scores. Learner reactions toward TBL sessions were positive as shown by the mean scores which were in the range of 3.59 to 4.66. Five themes were generated from the codes: “effective learning method”, “positive experience”, “gained knowledge”, “expression of gratitude” and “the way of conduction of the sessions”.

CONCLUSION: Online TBL in medical ethics was effective as a teaching learning tool in our setting. The students were satisfied with the learning process and rated the learning strategy positively.

PMID:36348392 | DOI:10.1186/s12909-022-03813-w