School of Clinical Medicine
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Item A radiation dose review for paediatric fluoroscopy in an Academic South African referral hospital(2017) Venter, MauritzINTRODUCTION Children are more sensitive to radiation and it is therefore important to reduce their exposure. There are currently no published data on South African paediatric fluoroscopic upper GIT, contrasted enemas and vesico-urethrogram dosage reference levels. AIM To determine the dose area product (DAP) values in common paediatric fluoroscopic examinations: Upper GIT studies, contrasted enemas and vesico-urethrograms. The primary endpoint was comparing our median and upper third quartile DAP values to international standards. METHOD We adhere to the Radiological Society of South Africa (RSSA)/South African Society of Paediatric Imaging’s (SASPI) guidelines to minimise radiation exposure. The upper third quartile and mean DAP values were collected between March 2013 and March 2016 for each study, categorised into four age groups (0–1, 2–5, 6–10 and 11–15 years) and stratified by our three major examinations. The data were compared to literature from the National UK Radiological Protection Board. RESULTS DAP values for upper GIT studies were significantly lower in the three younger age groups. There was no significant difference in the oldest age group. DAP values for vesico-urethrograms were significantly lower in the youngest age group. There was no significant difference in the three older age groups. For our contrasted enemas, there were no suitable data for comparison. CONCLUSION By following the RSSA / SASPI guidelines, our overall DAP values compared better than the UK National Patient Dose Database in the younger age groups and no worse in the older age groups.Item Epidemiology of maxillofacial fractures at two maxillofacial units in South Africa(South African Dental Association, 2018-04) Mogajane, Brampie; Mabongo, MzubanziThis article compares epidemiologic characteristics of maxillofacial fractures seen in patients presenting at Charlotte Maxeke Johannesburg Academic Hospital (CMJAH) with those seen at Polokwane – Mankweng Hospital Complex (PMHC).Item A descriptive retrospective record review of paediatric patients with intracardiac thrombi associated with dilated cardiomyopathy at Chris Hani Baragwanath academic hospital(2016-02-09) Morar, Deksha FayeIntracardiac thrombi associated with dilated cardiomyopathy in paediatric patients can be a source of significant morbidity and mortality. This study looked at the prevalence, risk factors and outcomes of children complicated by intracardiac thrombi, following a diagnosis of dilated cardiomyopathy at a tertiary centre. METHODS A retrospective review of all children, between the ages of 1 and 14 years, diagnosed with dilated cardiomyopathy from August 1983 to July 2011 were assessed using the paediatric cardiology database at Chris Hani Baragwanath Academic Hospital. The study population comprised of 303 children. RESULTS The prevalence of intracardiac thrombi in the children with dilated cardiomyopathy was 13.2% (40 children). The majority were located in the left ventricle (80%). The children who developed intracardiac thrombi had a lower fractional shortening compared to the group without intracardiac thrombi (p≤0.05). 20 of these children (6.6%) had evidence of embolization (15/20 to the central nervous system). 52 of the 303 children were HIV positive (17.2%). There was no statistically significant association between HIV status and the development of intracardiac thrombi (p = 0.19). The overall mortality was 8.9%. 12 of the 27 deaths occurred in the intracardiac thrombi group showing that the children with intracardiac thrombi had a poorer outcome (p≤0.05). CONCLUSION Intracardiac thrombi is a common occurrence in paediatric patients with dilated cardiomyopathy. There is a significant relationship between the development of intracardiac thrombi and a poor fractional shortening. Patients with echocardiographic evidence of intracardiac thrombi have a worse outcome.Item HIV-related knowledge, perceptions, attitudes, and utilisation of HIV counselling and testing: a venue-based intercept commuter population survey in the inner city of Johannesburg, South Africa(2015) Chimoyi, L; Tshuma, N; Muloongo, KBackground: HIV counselling and testing (HCT) and knowledge about HIV have been key strategies utilised in the prevention and control of HIV/AIDS worldwide. HIV knowledge and uptake of HCT services in sub-Saharan Africa are still low. This study was conducted to determine factors associated with HCT and HIV/AIDS knowledge levels among a commuter population in Johannesburg, South Africa. Objective: To identify the factors associated with HCT uptake among the commuter population. Design: A simple random sampling method was used to select participants in a venue-based intercept survey at a taxi rank in the Johannesburg Central Business District. Data were collected using an electronic questionnaire. Logistic regression analysis assessed factors associated with HIV testing stratified by gender. Results: 1,146 respondents were interviewed, the ma[j]ority (n = 579, 50.5%) were females and (n = 780, 68.1%) were over 25 years of age. Overall HCT knowledge was high (n = 951, 83%) with more females utilising HCT facilities. There was a significant difference in HIV testing for respondents living closer to and further away from health facilities. Slightly more than half of the respondents indicated stigma as one of the barriers for testing (n = 594, 52%, p-value = 0.001). For males, living with a partner (aOR: 1.68, 95% CI: 1.02-2.78, p-value: 0.041) and possessing a post-primary education were positively associated with testing (aOR: 2.00, 95% CI: 1.15-3.47, p-value: 0.014), whereas stigma and discrimination reduced the likelihood of testing (aOR: 0.40, 95% CI: 0.31-0.62, p-value: <0.001). For females, having one sexual partner (aOR: 2.65, 95% CI: 1.19-5.90, p-value: 0.017) and a low perceived benefit for HIV testing (aOR: 0.54, 95% CI: 0.30-0.96, p-value: 0.035) were associated with HIV testing. Conclusion: The overall HIV/AIDS knowledge was generally high. Gender-specific health education and HIV intervention programmes are needed for improved access to HCT services. One favourable intervention would be the use of home-based HCT programmes.Item Health-seeking behaviours by gender among adolescents in Soweto, South Africa(2015) Otwombe, K.; Dietrich, J.; Laher, F.BACKGROUND: Adolescents are an important age-group for preventing disease and supporting health yet little is known about their health-seeking behaviours. OBJECTIVE: We describe socio-demographic characteristics and health-seeking behaviours of adolescents in Soweto, South Africa, in order to broaden our understanding of their health needs. DESIGN: The Botsha Bophelo Adolescent Health Study was an interviewer-administered cross-sectional survey of 830 adolescents (14-19 years) conducted in Soweto from 2010 to 2012. Health-seeking behaviours were defined as accessing medical services and/or being hospitalised in the 6 months prior to the survey. Chi-square analysis tested for associations between gender, other socio-demographic and behavioural characteristics, and health-seeking behaviours. RESULTS: Of 830 adolescents, 57% were female, 50% were aged 17-19 years, 85% were enrolled in school, and 78% reported experiencing medium or high food insecurity. Males were more likely than females to report sexual debut (64% vs. 49%; p<0.0001) and illicit drug use (11% vs. 3%; p<0.0001). Approximately 27% (n=224) and 8% (n=65) reported seeking healthcare or being hospitalised respectively in the previous 6 months, with no significant differences by gender. Services were most commonly sought at medical clinics (75%), predominantly because of flu-like symptoms (32%), followed by concerns about HIV (10%). Compared to females, males were more likely to seek healthcare for condom breakage (8% vs. 2%; p=0.02). Relative to males, a significantly higher proportion of females desired general healthcare services (85% vs. 78%; p=0.0091), counselling (82% vs. 70%; p<0.0001), and reproductive health services (64% vs. 56%; p=0.02). CONCLUSIONS: A quarter of male and female adolescents accessed health services in the 6 months prior to the interview. Adolescents reported a gap between the availability and the need for general, reproductive, and counselling services. Integrated adolescent-friendly, school-based health services are recommended to bridge this gap.Item Factors associated with mortality in HIV-infected people in rural and urban South Africa(2014) Otwombe, KN; Petzold, M; Modisenyane, TBackground: Factors associated with mortality in HIV-infected people in sub-Saharan Africa are widely reported. However rural urban disparities and their association with all-cause mortality remain unclear. Furthermore, commonly used classical Cox regression ignores unmeasured variables and frailty. Objective: To incorporate frailty in assessing factors associated with mortality in HIV-infected people in rural and urban South Africa. Design: Using data from a prospective cohort following 6,690 HIV-infected participants from Soweto (urban) and Mpumalanga (rural) enrolled from 2003 to 2010; covariates of mortality were assessed by the integrated nested Laplace approximation method. Results: We enrolled 2,221 (33%) rural and 4,469 (67%) urban participants of whom 1,555 (70%) and 3,480 (78%) were females respectively. Median age (IQR) was 36.4 (31.0 44.1) in rural and 32.7 (28.2 38.1) in the urban participants. The mortality rate per 100 person-years was 11 (9.7 12.5) and 4 (3.6 4.5) in the rural and urban participants, respectively. Compared to those not on HAART, rural participants had a reduced risk of mortality if on HAART for 6 12 (HR: 0.20, 95% CI: 0.10 0.39) and 12 months (HR: 0.10, 95% CI: 0.05 0.18). Relative to those not on HAART, urban participants had a lower risk if on HAART 12 months (HR: 0.35, 95% CI: 0.27 0.46). The frailty variance was significant and 1 in rural participants indicating more heterogeneity. Similarly it was significant but B1 in the urban participants indicating less heterogeneity. Conclusion: The frailty model findings suggest an elevated risk of mortality in rural participants relative to the urban participants potentially due to unmeasured variables that could be biological, socio economic, or healthcare related. Use of robust methods that optimise data and account for unmeasured variables could be helpful in assessing the effect of unknown risk factors thus improving patient management and care in South Africa and elsewhere.Item Traditional male circumcision : Balancing cultural rights and the prevention of serious, avoidable harm.(2014-01) Behrens, K GThe right to participate in cultural practices should be protected. However, it is a limited right, and does not entail a right to activities that cause serious and avoidable harms. I argue that the harms currently resulting from traditional circumcision are very serious, and that we have an obligation to ensure that the practice is effectively regulated so as to minimise themItem The cost of harmful alcohol use in South Africa(2014-02) Matzopoulos, R G; Truen, S; Bowman, B; et al.Background. The economic, social and health costs associated with alcohol-related harms are important measures with which to inform alcohol management policies and laws. This analysis builds on previous cost estimates for South Africa. Methods. We reviewed existing international best-practice costing frameworks to provide the costing definitions and dimensions. We sourced data from South African costing literature or, if unavailable, estimated costs using socio-economic and health data from secondary sources. Care was taken to avoid possible causes of cost overestimation, in particular double counting and, as far as possible, second-round effects of alcohol abuse. Results. The combined total tangible and intangible costs of alcohol harm to the economy were estimated at 10 - 12% of the 2009 gross domestic product (GDP). The tangible financial cost of harmful alcohol use alone was estimated at R37.9 billion, or 1.6% of the 2009 GDP. Discussion. The costs of alcohol-related harms provide a substantial counterbalance to the economic benefits highlighted by the alcohol industry to counter stricter regulation. Curtailing these costs by regulatory and policy interventions contributes directly and indirectly to social well-being and the economy. Conclusions. Existing frameworks that guide the regulation and distribution of alcohol frequently focus on maximising the contribution of the alcohol sector to the economy, but should also take into account the associated economic, social and health costs. Current interventions do not systematically address the most important causes of harm from alcohol, and need to be informed by reliable evidence of the ongoing costs of alcohol-related harms.Item National expenditure on health research in South Africa : What is the benchmark ?(2014-07) Paruk, F.; Blackburn, J.M.; Friedman, I.B.; et al.The Mexico (2004), Bamako (2008) and Algiers (2008) declarations committed the South African (SA) Ministry of Health to allocate 2% of the national health budget to research, while the National Health Research Policy (2001) proposed that the country budget for health research should be 2% of total public sector health expenditure. The National Health Research Committee has performed an audit to determine whether these goals have been met, judged by: (i) health research expenditure as proportions of gross expenditure on research and development (GERD) and the gross domestic product (GDP); and (ii) the proportion of the national health and Department of Health budgets apportioned to research. We found that total expenditure on health research in SA, aggregated across the public and private sectors,was R3.5 billion in 2009/10, equating to 16.7% of GERD. However, the total government plus science council spend on health research that year was only R729 million, equating to 3.5% of GERD (0.03% of the GDP) or 0.80% of the R91.4 billion consolidated government expenditure on health. We further found that R418 million was spent through the 2009/2010 Health Vote on health research, equating to 0.46% of the consolidated government expenditure on health or 0.9% of the R45.2 billion Health Vote. Data from other recent years were similar. Current SA public sector health research allocations therefore remain well below the aspirational goal of 2% of the national health budget. We recommend that new, realistic, clearly defined targets be adopted and an efficient monitoring mechanism be developed to track future health research expenditure.Item Pregnancy and cardiac disease(2014-09) Elliot, C; Sliwa, K; Burton, RMedical disorders in pregnancy are one of the top five causes of maternal mortality in South Africa (SA), cardiac disease (CD) being the main contributor to this group. In developed countries, surgically corrected congenital heart disease (CHD) comprises the greater proportion of maternal deaths from CD. In SA and other developing countries, acquired heart disease such as rheumatic heart disease and cardiomyopathies are the major causes, although CHD remains significantly represented. Both congenital and acquired cardiac lesions may present for the first time during pregnancy. CD may also occur for the first time during or after pregnancy, e.g. peripartum cardiomyopathy. The risk to both the mother and the fetus increases exponentially with the complexity of the underlying disease. Generally, the ability to tolerate a pregnancy is related to: (i) the haemodynamic significance of any lesion; (ii) the functional class – New York Heart Association classes III and IV have poorer outcomes; (iii) the presence of cyanosis; and (iv) the presence of pulmonary hypertension. While the ideal time to assess these factors is before conception, women frequently present when already pregnant. This review discusses risk assessment and management of CD in pregnant women and the role of a combined cardiology and obstetric clinic.