Publications by authors named "Eugene Zwane"

Introduction: Understanding the risk factors for behavioral patterns in sexual relationships play a significant role in the reduction of the transmission of HIV/AIDS and other sexually transmitted infections.

Objective: To investigate individual and community level factors on the lifetime number of sexual partners of women in Eswatini.

Material And Methods: The study was a secondary cross-sectional analysis of the 2014 Eswatini Multiple Indicator Cluster Survey (MICS).

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Introduction: Child stunting is a significant public health problem in Eswatini. It is associated with a range of child health outcomes, including morbidity, physical and cognitive growth.

Objective: To determine the individual, household, and community-level factors associated with child stunting in Eswatini in 2010 and 2014.

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Article Synopsis
  • Pediatric tuberculous meningitis (TBM) results in high mortality and morbidity rates, making early diagnosis and treatment challenging, especially due to limited data on children's cerebral vascular and spinal involvement.
  • A study followed 44 children with TBM and hydrocephalus, revealing that 72% had good clinical outcomes, while 16% died; neurological imaging showed high rates of infarcts (66%) and spinal pathology (76%).
  • The research highlights that TBM causes extensive central nervous system damage, with severe infarction linked to poorer outcomes, while spinal involvement frequently complicates diagnosis and treatment, underscoring the need for thorough imaging assessments.
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Introduction: The frequency of adverse events, such as cerebral ischemia, following traumatic brain injury (TBI) is often debated. Point-in-time monitoring modalities provide important information, but have limited temporal resolution.

Purpose: This study examines the frequency of an adverse event as a point prevalence at 24 and 72 h post-injury, compared with the cumulative burden measured as a frequency of the event over the full duration of monitoring.

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Background: Intracranial pressure (ICP) monitoring is a cornerstone of care for severe traumatic brain injury (TBI). Management of ICP can help ensure adequate cerebral blood flow and oxygenation. However, studies indicate that brain hypoxia may occur despite normal ICP and the relationship between ICP and brain oxygenation is poorly defined.

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Background: This study examines the effect of an increase in the inspired fraction of oxygen (FiO2) on brain tissue oxygen (PbO2) in children with severe traumatic brain injury (TBI).

Methods: A prospective observational study of patients who underwent PbO2 monitoring and an oxygen challenge test (temporary increase of FiO2 for 15 min) was undertaken. Pre- and post-test values for arterial partial pressure of oxygen (PaO2), PbO2, and arterial oxygen content (CaO2) were examined while controlling for any changes in arterial carbon dioxide tension and cerebral perfusion pressure during the test.

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Background: Tuberculosis (TB) remains a leading cause of mortality and morbidity in South Africa. While adult TB results from both recent and past infection, childhood TB results from recent infection and reflects ongoing transmission despite current TB control strategies.

Setting: A South African community with high rates of TB and HIV disease.

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Object: Cerebral pressure autoregulation is an important neuroprotective mechanism that stabilizes cerebral blood flow when blood pressure (BP) changes. In this study the authors examined the association between autoregulation and clinical factors, BP, intracranial pressure (ICP), brain tissue oxygen tension (PbtO(2)), and outcome after pediatric severe traumatic brain injury (TBI). In particular we examined how the status of autoregulation influenced the effect of BP changes on ICP and PbtO(2).

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Objective: The indications for blood transfusion in traumatic brain injury are controversial. In particular, little is known about the effect of blood transfusion in childhood traumatic brain injury. This study aimed to examine the influence of blood transfusion on brain tissue oxygen tension in children with severe traumatic brain injury.

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Background: The TCD-derived PI has been associated with ICP in adult studies but has not been well investigated in children. We examined the relationship between PI and ICP and CPP in children with severe TBI.

Methods: Data were prospectively collected from consecutive TCD studies in children with severe TBI undergoing ICP monitoring.

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This study examined the concordance of genital human papillomavirus (HPV) infection in 254 heterosexually active couples and the impact of HIV coinfection. Genital HPV detection was significantly more common among HIV-infected women than among HIV-seronegative women (99 [68%] of 145 women vs. 33 [31%] of 107 women; P < .

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Introduction: Brain tissue oxygen tension (PbtO(2)) monitoring is used increasingly in adult severe traumatic brain injury (TBI) management. Several factors are known to influence PbtO(2) in adults, but the variables that affect PbtO(2) in pediatric TBI are not well described. This study examines the relationships between PbtO(2) and (1) physiological markers of potential secondary insults commonly used in pediatric TBI, in particular intracranial pressure (ICP), cerebral perfusion pressure (CPP), and systemic hypoxia, and (2) other clinical factors and treatment received that may influence PbtO(2).

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Introduction: Intracranial pressure (ICP) monitoring and cerebral perfusion pressure (CPP) management are the current standards to guide care of severe traumatic brain injury (TBI). However, brain hypoxia and secondary brain injury can occur despite optimal ICP and CPP. In this study, we used brain tissue oxygen tension (PbtO(2)) monitoring to examine the association between multiple patient factors, including PbtO(2), and outcome in pediatric severe TBI.

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Object: The goal of this paper was to examine the relationship between methods of acute clinical assessment and measures of secondary cerebral insults in severe traumatic brain injury in children.

Methods: Patients who underwent intracranial pressure (ICP), cerebral perfusion pressure (CPP), and brain oxygenation (PbtO(2)) monitoring and who had an initial Glasgow Coma Scale score, Pediatric Trauma Score, Pediatric Index of Mortality 2 score, and CT classification were evaluated. The relationship between these acute clinical scores and secondary cerebral insult measures, including ICP, CPP, PbtO(2), and systemic hypoxia were evaluated using univariate and multivariate analysis.

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In a retrospective cohort analysis, loss to follow-up and mortality rates were compared between pregnant and nonpregnant women referred to a community-based antiretroviral treatment program in South Africa. Although there was no significant difference in adjusted mortality rates between the two groups, the pregnant women had a substantially higher risk of loss to follow-up both pretreatment and on-treatment. This finding highlights the need for programmatic interventions to address retention in care for this patient population.

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Registrations in epidemiological studies suffer from incompleteness, thus a general consensus is to use capture-recapture models. Lately, there has been a thrust to incorporate covariates which relate to the capture probabilities in order to improve the estimate of population size. Current approaches utilize covariates observed in all the pertinent registrations.

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In multiple-record systems estimation it is usually assumed that all registration relate to the same population. In this paper, we develop a method which can be used when the registrations relate to different populations, in the sense that they cover, for example, different time periods or regions. We show that under certain conditions ignoring that the registrations relate to different populations results in correct estimates of population size.

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