Thinking political sociology: beyond the limits of post-Marxism

This article is concerned with post-Marxism and materialism in the work of Judith Butler, Ernesto Laclau and Chantal Mouffe. As ‘post-Marxists’ these writers use ‘material’ in a variety of ways, all of which indicate limits and constraints. The article focuses on one version of ‘materialism’ in this work, a version that is more implied than elaborated, in which ‘material’ is equivalent to institutionalized performativity or sedimented discourse: to ‘objective’ social structures and institutions. Post-Marxists often use ‘the social’ as equivalent to ‘material’ in this sense, to gesture towards the context in which politics succeeds or fails. I argue that the specificities of ‘the social’ cannot be theorized from within the terms of post-Marxism itself and that Butler and Laclau acknowledge this limitation in their most recent work. I therefore conclude that post-Marxism needs a supplement that I call political sociology. This is a dangerous supplement in the Derridean sense: a necessary addition that destabilizes the value post-Marxism gives to the distinction between ‘social’ and ‘political’ in which the latter is the privileged term

Chiral Dynamics and Fermion Mass Generation in Three Dimensional Gauge Theory

We examine the possibility of fermion mass generation in 2+1- dimensional gauge theory from the current algebra point of view.In our approach the critical behavior is governed by the fluctuations of pions which are the Goldstone bosons for chiral symmetry breaking. Our analysis supports the existence of an upper critical number of Fermion flavors and exhibits the explicit form of the gap equation as well as the form of the critical exponent for the inverse correlation lenght of the order parameterComment: Latex,10 pages,DFUPG 70/9

Mitochondrial diversity analysis of Glossina palpalis gambiensis from Mali and Senegal

West African riverine tsetse populations of Glossina palpalis gambiensis Vanderplank (Diptera: Glossinidae) were investigated for gene flow, inferred from mitochondrial diversity in samples of 69 flies from Senegal and 303 flies from three river drainages in Mali. Four polymorphic mitochondrial loci were scored. Mean haplotype diversities were 0.30 in Mali and 0.18 over both Mali and Senegal. These diversities estimate the probabilities that two randomly chosen tsetse have different haplotypes. Substantial rates of gene flow were detected among flies sampled along tributaries belonging to the river basins of the Senegal, Niger, and Bani in Mali. There was virtually no gene flow between tsetse in Senegal and Mali. No seasonal effects on gene flow were detected. The implications of these preliminary findings for the implementation of area-wide integrated pest management (AW-IPM) programmes against riverine tsetse in West Africa are discussed

Underestimation of Potentially Traumatic Events Resulting From Underreporting of Physical and Sexual Violence Among People Entering Care for HIV in Cameroon

Objective: Measures ascertaining exposure to potentially traumatic events (PTEs) frequently ask respondents about experienced physical and sexual violence. However, little is known about the performance of physical and sexual violence questions on PTE assessments and its effect on PTE classification overall. We estimated underreporting of physical and sexual violence on a PTE assessment among individuals entering HIV care in Cameroon. Method: We compared reports of physical and sexual violence captured via a behaviorally specific measure of intimate partner violence (IPV; Demographic and Health Survey [DHS] domestic violence module = referent) to those captured via two single-item questions that assessed exposure to physical and sexual PTEs during one’s adult life to determine the degree of underreporting on the single-item PTE assessment questions. We explored correlates of underreporting on the PTE assessment using Pearson’s chisquared tests. Results: Overall, 99 (23%) and 113 (27%) of 426 total participants reported instances of sexual and physical violence in their most recent partnership on the behaviorally specific DHS IPV module, respectively. Of those reporting sexual and physical IPV on the DHS module, just 6% (n = 6) and 52% (n = 59) reported sexual and physical violence as an adult on the single-item PTE assessment questions, respectively. Underreporting of physical violence on the PTE assessment was associated with lower educational attainment (p <.05) and reporting being punched (p <.01) or having one’s hair pulled or arm twisted (p <.05) by one’s most recent partner. Conclusions: PTE assessment tools should assess exposure to behaviorally specific acts of violence to ensure appropriate referral to services among survivors of IPV

The Importance of Incorporating At-Home Testing Into SARS-CoV-2 Point Prevalence Estimates: Findings From a US National Cohort, February 2022

Background: Passive, case-based surveillance underestimates the true extent of active infections in the population due to undiagnosed and untested cases, the exclusion of probable cases diagnosed point-of-care rapid antigen tests, and the exclusive use of at-home rapid tests which are not reported as part of case-based surveillance. The extent in which COVID-19 surveillance may be underestimating the burden of infection is likely due to time-varying factors such as decreased test-seeking behaviors and increased access to and availability of at-home testing. Objective: The objective of this study is to estimate the prevalence of SARS-CoV-2 based on different definitions of a case to ascertain the extent to which cases of SARS-CoV-2 may be underestimated by case-based surveillance. Methods: A survey on COVID-19 exposure, infection, and testing was administered to calculate point prevalence of SARS-CoV-2 among a diverse sample of cohort adults from February 8, 2022, to February 22, 2022. Three-point prevalence estimates were calculated among the cohort, as follows: (1) proportion positives based on polymerase chain reaction (PCR) and rapid antigen tests; (2) proportion positives based on testing exclusively with rapid at-home tests; and (3) proportion of probable undiagnosed cases. Test positivity and prevalence differences across booster status were also examined. Results: Among a cohort of 4328, there were a total of 644 (14.9%) cases. The point prevalence estimate based on PCR or rapid antigen tests was 5.5% (95% CI 4.8%-6.2%), 3.7% (95% CI 3.1%-4.2%) based on at-home rapid tests, and 5.7% (95% CI 5.0%-6.4%) based on the case definition of a probable case. The total point prevalence across all definitions was 14.9% (95% CI 13.8%-16.0%). The percent positivity among PCR or rapid tests was 50.2%. No statistically significant differences were observed in prevalence between participants with a COVID-19 booster compared to fully vaccinated and nonboosted participants except among exclusive at-home rapid testers. Conclusions: Our findings suggest a substantial number of cases were missed by case-based surveillance systems during the Omicron B.1.1.529 surge, when at-home testing was common. Point prevalence surveys may be a rapid tool to be used to understand SARS-CoV-2 prevalence and would be especially important during case surges to measure the scope and spread of active infections in the population

Mental health and initiation of antiretroviral treatment at enrolment into HIV care in Cameroon under a national “treat all” policy: a cross-sectional analysis

Introduction: Rapid antiretroviral treatment (ART) initiation reduces time from HIV infection to viral suppression, decreasing HIV transmission risk. Mental health symptoms may influence timing of ART initiation. This study estimated the prevalence of ART initiation at enrolment into HIV care and the relationship between mental health and ART initiation at enrolment into HIV care. Methods: We conducted interviews with 426 individuals initiating HIV care in Cameroon between June 2019 and March 2020 to estimate the association between mental health and timing of ART initiation. Depression (Patient Health Questionnaire-9; cut-point 10), anxiety (Generalized Anxiety Disorder-7; cut-point 10), post-traumatic stress disorder (PTSD) (PTSD Checklist for DSM-5; cut-point 31) and harmful alcohol use (Alcohol Use Disorders Identification Test; cut-point 16) were dichotomized to represent those with and without each exposure at first HIV care appointment. Date of ART initiation (date ART prescribed) was ascertained from medical records. Separate multivariable log-binomial regression models were used to estimate the association between mental health exposures and ART initiation at enrolment into care. Results and discussion: Overall, 87% initiated ART at enrolment into HIV care. Approximately 20% reported depressive symptoms, 15% reported PTSD symptoms, 12% reported anxiety symptoms and 13% reported harmful alcohol use. In multivariable analyses, individuals with moderate to severe depressive symptoms had 1.7 (95% confidence interval [CI] 1.1, 2.7) times the prevalence of not initiating ART at enrolment into HIV care compared to those with no or mild depressive symptoms. Those with symptoms of PTSD, compared to those without, had 1.9 (95% CI 1.2, 2.9) times the prevalence of not initiating ART at enrolment into HIV care. Symptoms of anxiety or harmful drinking were not associated with ART initiation at enrolment into HIV care in multivariable models. Conclusions: Symptoms of depression and PTSD were associated with lower prevalence of ART initiation at enrolment into HIV care among this sample of individuals initiating HIV care in Cameroon under a “treat all” policy. Research should examine barriers to timely ART initiation, whether incorporating mental health services into HIV care improves timely ART initiation, and whether untreated symptoms of depression and PTSD drive suboptimal HIV care outcomes

Towards Machine Wald

The past century has seen a steady increase in the need of estimating and predicting complex systems and making (possibly critical) decisions with limited information. Although computers have made possible the numerical evaluation of sophisticated statistical models, these models are still designed \emph{by humans} because there is currently no known recipe or algorithm for dividing the design of a statistical model into a sequence of arithmetic operations. Indeed enabling computers to \emph{think} as \emph{humans} have the ability to do when faced with uncertainty is challenging in several major ways: (1) Finding optimal statistical models remains to be formulated as a well posed problem when information on the system of interest is incomplete and comes in the form of a complex combination of sample data, partial knowledge of constitutive relations and a limited description of the distribution of input random variables. (2) The space of admissible scenarios along with the space of relevant information, assumptions, and/or beliefs, tend to be infinite dimensional, whereas calculus on a computer is necessarily discrete and finite. With this purpose, this paper explores the foundations of a rigorous framework for the scientific computation of optimal statistical estimators/models and reviews their connections with Decision Theory, Machine Learning, Bayesian Inference, Stochastic Optimization, Robust Optimization, Optimal Uncertainty Quantification and Information Based Complexity.Comment: 37 page

Prevalence of stressful life events and associations with symptoms of depression, anxiety, and post-traumatic stress disorder among people entering care for HIV in Cameroon

Background: Exposure to stressors increases the risk of mental health disorders. People living with HIV (PLWH) are particularly affected by poor mental health which can contribute to adverse HIV treatment outcomes. Methods: We estimated the prevalence of recent stressful life events (modified Life Events Survey) among a cohort of PLWH entering HIV care at three public health care facilities in Cameroon and quantified the association of seven types of stressful life events with symptoms of depression (Patient Health Questionnaire-9 scores>9), anxiety (General Anxiety Disorder-7 scores>9), and PTSD (PTSD Checklist for DSM-5 scores>30) using separate log-binomial regression models. Results: Of 426 PLWH enrolling in care, a majority were women (59%), in relationships (58%), and aged 21 to 39 years (58%). Recent death of a family member (39%) and severe illness of a family member (34%) were the most commonly reported stressful life events. In multivariable analyses, more stressful life event types, a negative relationship change, death or illness of a friend/family member, experience of violence, work-related difficulties, and feeling unsafe in one's neighborhood were independently associated with at least one of the mental health outcomes assessed. The greatest magnitude of association was observed between work-related difficulties and PTSD (adjusted prevalence ratio: 3.1; 95% confidence interval: 2.0–4.8). Limitations: Given the design of our study, findings are subject to recall and social desirability bias. Conclusions: Stressful life events were common among this population of PLWH entering care in Cameroon. Evidence-based interventions that improve coping, stress management, and mental health are needed

Age-varying Associations of Depressive Symptoms and Heavy Episodic Drinking Throughout Adulthood Among People with HIV and Receiving care in Cameroon Within a National “treat all” Policy

Comorbid depression and heavy episodic drinking (HED) may threaten the success of “treat all” policies in sub-Saharan Africa as the population of people with HIV (PWH) ages. We investigated associations between depressive symptoms and heavy episodic drinking (HED) and the extent the relationship differed across ages among PWH receiving HIV care in Cameroon. We conducted a retrospective analysis of 18-60-year-old PWH on antiretroviral therapy in Cameroon from January 2016 to March 2020. Age-varying effect modelling was conducted to assess associations between depressive symptoms and HED across ages and by gender. Prevalence of depression and HED was highest at ages 20 and 25, respectively. After age 25, the magnitude of the association between depressive symptoms and HED was significant and increased until age 30 (aOR: 1.88, 95% CI: 1.48, 2.39), with associations remaining significant until age 55 (aOR: 1.64, 95% CI: 1.17, 2.29). Women had more variability and higher magnitudes of associations between depressive symptoms and HED than men. The interrelationship between depressive symptoms and HED was significant throughout most of adulthood for PWH receiving HIV care in Cameroon. Understanding age and gender trends in these associations can guide integration efforts in HIV care settings