Anxiety in Mexican adults throughout the COVID-19 pandemic: A cross sectional study.

INTRODUCTION: Perceived fear during a pandemic along with measures used to contain it can develop or intensify anxiety symptoms. In Mexico, information on the psychological impact of the COVID-19 pandemic in the general population is scarce. OBJECTIVE: We examined the prevalence and factors associated with anxiety during the COVID-19 outbreak in a Mexican sample. METHOD: We conducted a cross sectional study from June 15, 2020, to January 31, 2021, in a state in north-eastern Mexico, using an online survey. Beck Anxiety Inventory was used to determine the prevalence and severity of anxiety. RESULTS: The overall prevalence of anxiety was 43.5 %. Categories with the highest anxiety prevalence within their groups were women (46.2 %), age group of 18-30 years (47.3 %), higher level of education (43 %), students (48.8 %) and people who weren't currently with a couple (47.3 %). Additionally, we found that people who reported clinically significant anxiety were more likely to be women, ages 18-30 years, not currently partnered and currently living with a psychiatric disorder. Moreover, patients with clinically significant anxiety were more likely to be diagnosed with a mood, anxiety, trauma and stress, or an eating disorder. We also observed that being a woman and having at least one psychiatric disorder were independent factors related to a positive anxiety screening. DISCUSSION AND CONCLUSION: COVID-19 outbreak results in considerable increase in anxiety symptoms among the Mexican population. It is important to acknowledge the psychological impact of contingency situations to provide information that can allow establishing preventive and therapeutic strategies.

Prevalence of suicidality, depression, post-traumatic stress disorder, and anxiety among female sex workers: a systematic review and meta-analysis.

The purpose was to assess prevalence of suicidality, depression, post-traumatic stress disorder (PTSD), and anxiety among female sex workers (FSW). A systematic review and meta-analysis was performed. Search strategy was performed in MEDLINE, Scopus, Web of Science, EMBASE, Ovid and Cochrane Central Database from inception until March 2020. Considered for inclusion were cross-sectional studies performed on FSW that assessed prevalence of any of the following: suicide attempt or suicidal ideation, depression, PTSD, or anxiety. Five reviewers, independently and in duplicate, selected all eligible articles in an abstract and full-text screening phase and, moreover, extracted information from each study. A binomial-normal generalized linear mixed model was employed to estimate prevalence of the conditions. From 8035 studies yielded in the search strategy, 55 were included for analysis. The overall prevalence of suicidal ideation and attempt was 27% (95% C.I. 18-39%) and 20% (95% C.I. 13-28%), respectively. Furthermore, overall prevalence of depression and PTSD was 44% (95% C.I. 35-54%) and 29% (95% C.I. 18-44%), respectively. Eleven studies were classified as high quality. Findings indicate that there is an overall high prevalence of suicidality, depression, and PTSD among FSW. Development of accessible large-scale interventions that assess mental health among this population remains critical.

Tratamiento de la esquizofrenia en México: recomendaciones de un panel de expertos.

La esquizofrenia es una enfermedad compleja que actualmente no tiene cura. Existen, sin embargo, numerosas terapias que, solas o en combinación, son eficaces para tratar los síntomas de la enfermedad y mantenerla bajo control. La elección del tratamiento debe ser siempre individualizada, y basarse en la presentación clínica de la enfermedad, el estado general del paciente y la eficacia del fármaco, si bien hay que considerar también el costo y el acceso a servicios y al fármaco, que en México tiene algunas limitaciones. Un panel de 12 expertos mexicanos se reunió de forma virtual para revisar los últimos datos publicados y establecer unas recomendaciones de tratamiento en México, basadas en la evidencia, que garanticen una atención médica integral, homogénea, eficiente y con calidad.Schizophrenia is a complex illness that currently has no cure. There are, however, numerous therapies that, alone or in combination, are effective in treating the symptoms of the disease and keeping it under control. The choice of treatment must always be individualized, and based on the clinical presentation of the disease, the general condition of the patient and the efficacy of the drug, although the cost and access to services and to the drug must also be considered, as in Mexico it has some limitations. A panel of 12 Mexican experts met virtually to review the latest published data and establish evidence-based treatment recommendations in Mexico that guarantee comprehensive, homogeneous, efficient, and quality medical care.

Predictors of the length of stay of psychiatric inpatients: protocol for a systematic review and meta-analysis.

BACKGROUND: Length of stay (LOS) for inpatient psychiatric services is an important factor with serious drawbacks when it is extended more than needed. Impacts on economy, social functioning, and stigma can hamper improvement and affect the patients' experiences on future mental healthcare. Predictions of which patients have a higher chance for prolonged LOS have been extensively researched. Previous systematic reviews found consistent predictors of both longer and shorter LOS. However, they do not provide an estimate from the pooled effect sizes. Furthermore, to our knowledge, there is no meta-analysis on the influence of these factors. The primary objective of this study will be to provide point estimates on the effect sizes of all studied predictors of the LOS of psychiatric inpatients. METHODS: We will conduct a systematic search in PubMed, MEDLINE, EMBASE, and PsycINFO for observational studies evaluating the effect size of independent factors on the length of stay of psychiatric inpatients. Prospective and retrospective cohorts that assess the influence of predictors through the reporting of standardized regression coefficients will be included. We will provide a qualitative synthesis of the findings from each study and perform a meta-analysis from pooled regression coefficients that were adjusted for other variables or confounders in order to obtain a point estimate and confidence interval for all factors extracted from the included studies. DISCUSSION: The results from this study may provide more accurate predictions for mental health institutions, psychiatrists, mental health service providers, patients, and families on the prognosis regarding the length of stay for needed inpatient care. This information may be used to anticipate individuals with a higher chance for prolonged hospitalization to plan the necessary interventions for these specific situations. Considering both the benefits and disadvantages of longer and shorter stays, the pooled estimates for independent factors may be used by mental healthcare providers and patients for informed decision-making. The results from this study will also update results presented in previous studies and identify the strengths and limitations from the current available evidence. SYSTEMATIC REVIEW REGISTRATION: PROSPERO ID CRD42020172840.

Tratamiento de la esquizofrenia en México: recomendaciones de un panel de expertos / Treatment of schizophrenia in Mexico: recommendations from an expert panel

Resumen La esquizofrenia es una enfermedad compleja que actualmente no tiene cura. Existen, sin embargo, numerosas terapias que, solas o en combinación, son eficaces para tratar los síntomas de la enfermedad y mantenerla bajo control. La elección del tratamiento debe ser siempre individualizada, y basarse en la presentación clínica de la enfermedad, el estado general del paciente y la eficacia del fármaco, si bien hay que considerar también el costo y el acceso a servicios y al fármaco, que en México tiene algunas limitaciones. Un panel de 12 expertos mexicanos se reunió de forma virtual para revisar los últimos datos publicados y establecer unas recomendaciones de tratamiento en México, basadas en la evidencia, que garanticen una atención médica integral, homogénea, eficiente y con calidad.

Abstract Schizophrenia is a complex illness that currently has no cure. There are, however, numerous therapies that, alone or in combination, are effective in treating the symptoms of the disease and keeping it under control. The choice of treatment must always be individualized, and based on the clinical presentation of the disease, the general condition of the patient and the efficacy of the drug, although the cost and access to services and to the drug must also be considered, as in Mexico it has some limitations. A panel of 12 Mexican experts met virtually to review the latest published data and establish evidence-based treatment recommendations in Mexico that guarantee comprehensive, homogeneous, efficient, and quality medical care.

High polygenic burden is associated with blood DNA methylation changes in individuals with suicidal behavior.

Suicidal behavior is result of the interaction of several contributors, including genetic and environmental factors. The integration of approaches considering the polygenic component of suicidal behavior, such as polygenic risk scores (PRS) and DNA methylation is promising for improving our understanding of the complex interplay between genetic and environmental factors in this behavior. The aim of this study was the evaluation of DNA methylation differences between individuals with high and low genetic burden for suicidality. The present study was divided into two phases. In the first phase, genotyping with the Psycharray chip was performed in a discovery sample of 568 Mexican individuals, of which 149 had suicidal behavior (64 individuals with suicidal ideation, 50 with suicide attempt and 35 with completed suicide). Then, a PRS analysis based on summary statistics from the Psychiatric Genomic Consortium was performed in the discovery sample. In a second phase, we evaluated DNA methylation differences between individuals with high and low genetic burden for suicidality in a sub-sample of the discovery sample (target sample) of 94 subjects. We identified 153 differentially methylated sites between individuals with low and high-PRS. Among genes mapped to differentially methylated sites, we found genes involved in neurodevelopment (CHD7, RFX4, KCNA1, PLCB1, PITX1, NUMBL) and ATP binding (KIF7, NUBP2, KIF6, ATP8B1, ATP11A, CLCN7, MYLK, MAP2K5). Our results suggest that genetic variants might increase the predisposition to epigenetic variations in genes involved in neurodevelopment. This study highlights the possible implication of polygenic burden in the alteration of epigenetic changes in suicidal behavior.

EXPLORATORY ANALYSIS OF POLYGENIC RISK SCORES FOR PSYCHIATRIC DISORDERS: APPLIED TO DUAL DIAGNOSIS.

BACKGROUND: Concurrence of substance use disorders (SUDs) is high in individuals with psychiatric illnesses; more importantly, individuals with both disorders (dual diagnosis) have more severe symptoms. Psychiatric disorders have been proposed to share a genetic susceptibility with SUDs. To explore this shared genetic susceptibility, we analyzed whether any of the polygenic risk scores (PRSs) for psychiatric disorders could be associated to dual diagnosis in patients with schizophrenia (SCZ) or bipolar disorder (BD). METHODS: We included 192 individuals of Mexican ancestry: 72 with SCZ, 53 with BD, and 67 unrelated controls without psychiatric disorders. We derived calculations of PRS for autism spectrum disorders, attention-deficit/hyperactive disorder, BD, major depression, and SCZ using summary genome-wide association statistics previously published. RESULTS: We found that dual diagnosis had a shared genetic susceptibility with major depressive disorder (MDD) and SCZ; furthermore, in individuals with BD, dual diagnosis could be predicted by PRS for MDD. CONCLUSIONS: Our results reinforce the notion that individuals with dual diagnosis have a higher genetic susceptibility to develop both disorders. However, analyses of larger sample sizes are required to further clarify how to predict risks through PRS within different populations.

Exploratory analysis of polygenic risk scores for psychiatric disorders: Applied to dual diagnosis

Background Concurrence of substance use disorders (SUDs) is high in individuals with psychiatric illnesses; more importantly, individuals with both disorders (dual diagnosis) have more severe symptoms. Psychiatric disorders have been proposed to share a genetic susceptibility with SUDs. To explore this shared genetic susceptibility, we analyzed whether any of the polygenic risk scores (PRSs) for psychiatric disorders could be associated to dual diagnosis in patients with schizophrenia (SCZ) or bipolar disorder (BD). Methods We included 192 individuals of Mexican ancestry: 72 with SCZ, 53 with BD, and 67 unrelated controls without psychiatric disorders. We derived calculations of PRS for autism spectrum disorders, attention-deficit/hyperactive disorder, BD, major depression, and SCZ using summary genome-wide association statistics previously published. Results We found that dual diagnosis had a shared genetic susceptibility with major depressive disorder (MDD) and SCZ; furthermore, in individuals with BD, dual diagnosis could be predicted by PRS for MDD. Conclusions Our results reinforce the notion that individuals with dual diagnosis have a higher genetic susceptibility to develop both disorders. However, analyses of larger sample sizes are required to further clarify how to predict risks through PRS within different populations.

Differential effects on neurodevelopment of FTO variants in obesity and bipolar disorder suggested by in silico prediction of functional impact: An analysis in Mexican population.

INTRODUCTION: Several studies indicate that polygenic obesity is linked to fat-mass and obesity-associated (FTO) genetic variants. Nevertheless, the link between variants in FTO and mental disorders has been barely explored. The present work aims to determine whether FTO genetic variants are associated with bipolar disorder and obesity, and to perform an in silico prediction of variant-dependent functional impact on the developing brain transcriptome. METHODS: Four hundred and forty-six Mexican mestizos were included in a genetic association analysis. SNP-sequence kernel association test and linear mixed models were implemented for genetic association assessment. For functional impact prediction, we analyzed the mapping of regulatory elements, the modification of binding sites of transcription factors and the expression of transcription factors in the brain developing transcriptome, searching on different databases. RESULTS: In the set-based analysis, we found different associated regions to BD (bipolar disorder) and obesity. The promoter flanking region of FTO intron 1 was associated with differential effects on BMI, while intron 2 of RPGRIP1L and FTO upstream regions were associated with BD. The prediction analysis showed that FTO BD-associated variants disturb binding sites of SP1 and SP2; obesity-associated variants, on the other hand, disturb binding sites of FOXP1, which are transcription factors highly expressed during prenatal development stages of the brain. CONCLUSION: Our results suggest a possible effect of FTO variants on neurodevelopment in obesity and bipolar disorder, which gives new insights into the molecular mechanism underlying this association.