Piet Becker

Piet Becker
University of Pretoria | UP · Research Office

PhD (Statistics)

About

152
Publications
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Publications

Publications (152)
Article
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Tailored obesity management includes understanding physical activity (PA) and its context, ideally in childhood before the onset of health risk. This cross-sectional study determined, by sex and population, the PA of Southern African pre-adolescent urban primary school children. PA was measured objectively (step count: pedometer) and subjectively (...
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Weight-for-age (WFA) growth faltering often precedes severe acute malnutrition (SAM) in children, yet it is often missed during routine growth monitoring. Automated interpretation of WFA growth within electronic health records could expedite the identification of children at risk of SAM. This study aimed to develop an automated screening tool to pr...
Article
Background: In South Africa overweight/obesity is a public health concern, disproportionally affecting black females. A contributory role of a lower resting energy expenditure (REE) is suggested for African Americans. This study assessed the REE of black and white South African adults to better understand the underlying predictors to overweight/ob...
Article
Objective The platform provided by human papillomavirus (HPV) vaccination for linked public health interventions to improve cervical cancer prevention remains incompletely explored. The Vaccine And Cervical Cancer Screen (VACCS) cross-sectional observation trials aimed to evaluate the efficacy of school-based HPV vaccination linked with maternal ce...
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[This corrects the article DOI: 10.4102/sajpsychiatry.v25i0.1397.].
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Low back pain can be infl uenced by demographic, lifestyle and co-morbid factors, but there are few studies on the relationship between these in South African hospital employees. This cross-sectional study aimed to determine the point prevalence for low back pain and the factors associated with its presence amongst staff employed at a district hosp...
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Sepsis and septic shock are key contributors to mortality in critically ill patients and thus prompt recognition and management thereof is central to achieving improved patient outcomes. Early initiation of appropriate antimicrobial therapy constitutes a crucial component of the management strategy and thus early identification of the causative pat...
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Lower resting energy expenditure (REE) may partially explain the disproportionate prevalence of overweight/obesity among black African women. As no previous studies have investigated the REE of Southern African (South. Afr.) children, we aimed to determine, by sex and population group, the REE of 6- to 9-year-old urban school children. In a cross-s...
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Background: Globally interest has grown in promoting the rights of patients, especially psychiatric patients. Two core elements of patients’ rights are the rights to be treated in a dignified manner and to give feedback about services. Psychiatric patients may feel treated in an undignified manner, especially during involuntary hospital admissions....
Article
The study aim was to determine whether a relationship exists between the cardiovascular response, measured by HR and HRV and the magnitude of whole-body vibration. Cardiovascular response of sixty male participants in four groups, was measured during three states i.e. 1) no vibration, 2) a reference vibration and 3) an alternative vibration. The re...
Article
Chronic myeloid leukaemia (CML) is a malignancy of the haematopoietic stem cells. The first line of treatment for CML, especially in developing countries, remains the first‐generation tyrosine kinase inhibitor, Imatinib. Patients with CML are frequently diagnosed with platelet abnormalities. However, the specific mechanism of platelet abnormalities...
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Objective: Amidst a high prevalence of prematurity, limited research on the growth of very low birth weight (VLBW) preterm infants and the availability of a reformulated fortifier (RF), the study aimed to compare in-hospital growth of such infants receiving exclusively human milk fortified with either of two different formulations in a tertiary So...
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Background South Africa has unique and diverse social and economic factors that have an impact on the provision of basic water, sanitation, hygiene and waste management infrastructure and practices at health care facilities in ensuring patient safety and prevent the spread of diseases. Methods The aim of this study was to evaluate water, sanitatio...
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Objectives Increasing antimicrobial resistance has become a looming threat to paediatric health and, therefore, health facilities are obliged to practice antimicrobial stewardship. This study was undertaken to review stewardship adherence in the Department of Pediatrics at the Central Hospital, Pretoria, South Africa. Methods Antibiotic prescripti...
Article
Background: Allergy is a common health problem in South Africa (SA), and a rational approach to allergy testing is essential to ensure cost-effective as well as optimal patient diagnosis and management. Objectives: To review allergy testing data with respect to current national testing recommendations, and to explore the regional variations in s...
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Background: A relationship exists between occupational noise exposure and age, which remains poorly understood. Objectives: The aim of this study was to establish the relationship between hearing loss and age over time. Method: Audiological data from 2583 mine workers in South Africa were utilised. Data were received from a non-noise exposed grou...
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Background: Obstructive sleep apnoea is commonly aggravated by the supine body position. The impact of body position on the severity of mixed and central sleep apnoeas is understudied. Objectives: To evaluate the impact of body position on obstructive, mixed and central apnoea indices in subjects presenting with this triform of sleep apnoea duri...
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Background: In the South African healthcare system, mentally ill patients first come into contact with primary care physicians who then refer these patients for specialised care if needed. Medical students therefore need to acquire the knowledge, skills and confidence to treat mentally ill patients. Aim: To evaluate the perceptions of medical stud...
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Background: Evaluating the impact of a nutrition education program could provide insight into the effectiveness of an intervention. Researchers tested the hypothesis that a theory-based contextual nutrition education program (NEP) would improve the nutrition knowledge, attitudes, and dietary practices (KAP) of teachers and learners. Methods: Twenty...
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Background: Young children exhibit a high susceptibility to several diarrhoea-causing bacterial microorganisms. In this study, the prevalence of fecal contamination on children's toys was determined using total coliform and E. coli as bacterial fecal indicators. The prevalence of diarrhoeagenic E. coli strains were used as an indication of the pot...
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Optimal bone health is important in children to reduce the risk of osteoporosis later in life. Both body composition and vitamin D play an important role in bone health. This study aimed to describe bone health, body composition, and vitamin D status, and the relationship between these among a group of conveniently sampled black preadolescent South...
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Objective: The focus of interventions for adults living with HIV (ALH) in Nigeria has been mostly on prevention and provision of antiretroviral therapy (ART) with little consideration to nutrition-related matters. Therefore, the present study aimed to improve the quality of life (QoL) and anthropometric status of ALH in Abeokuta, Nigeria. Design:...
Article
Background: Despite strong reservations regarding the validity of a number of heart rate variability (HRV) measures, these are still being used in recent studies. Aims: We aimed to compare the reactivity of ostensible sympathetic HRV markers (low and very low frequency [LF and VLF]) to that of electrodermal activity (EDA), an exclusively sympatheti...
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Background. Successful extubation of mechanically ventilated patients is essential for the physiotherapist to succeed in respiratory rehabilitation of the patient. Delay in the weaning process increases the complication rate of mechanical ventilation. A variety of parameters are used as predictors of extubation readiness, but the association betwee...
Article
Background: Limited information is available on gingival recession or localised aggressive periodontitis among HIV-infected children and adolescents. This study reports on the prevalence of these conditions among children and adolescents receiving antiretroviral therapy (ART). Methods: A cross-sectional study on HIV-infected children and adolesc...
Article
Objective To compare the antimicrobial efficacy of a 2% chlorhexidine gluconate and 70% ethanol solution (CG+A) with that of F10 Skin Prep Solution (F10) and electrochemically activated water (EAW) when used as a surgical preparation in canine patients. Study design Prospective randomized clinical study. Sample population One hundred sixteen dogs...
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Acinetobacter baumannii is an opportunistic pathogen that is increasingly responsible for hospital-acquired infections. The increasing prevalence of carbapenem resistant A. baumannii has left clinicians with limited treatment options. Last line antimicrobials (i.e., polymyxins and glycylcyclines) are often used as treatment options. The aim of this...
Article
Background Work‐related postural change could lead to improved musculoskeletal health. Method(s) In a quantitative, retrospective, longitudinal study, data of work‐related musculoskeletal disorders of 123 sewing‐machine operators were captured for 4.5 years, and analysed using Poisson regression. Results Stand‐up work posture (SUWP) reduced the i...
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The purpose of this study was to develop a real time polymerase chain reaction (PCR) assay for the detection of the JAK2 V617F mutation that could be used in diagnostic laboratories. Sanger sequencing and a newly developed locked nucleic-acid, real-time PCR assay were used to detect the JAK2 V617F mutation. There was 100% agreement between the sequ...
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Several studies have been conducted on decomposition patterns and rates of surface remains; however, much less are known about this process for buried remains. Understanding the process of decomposition in buried remains is extremely important and aids in criminal investigations, especially when attempting to estimate the post mortem interval (PMI)...
Article
Background: Stigma towards the mentally ill is a well-known phenomenon and it is not restricted to certain communities or countries. Stigma, be it self-stigma or public stigma, has a major influence in mental health care. Aim: The aim of this study was to determine whether stigmatizing attitudes towards the mentally ill differ according to the l...
Conference Paper
Introduction: Atopobium vaginae and Gardnerella vaginalis are bacterial species that are present in the vagina in increased concentrations during bacterial vaginosis (BV). Numerous studies have proposed a molecular diagnosis of BV by targeting several BV-related bacteria in a polymerase chain reaction (PCR); however, these studies evaluated separat...
Article
Objectives The purpose of this cross-sectional study was to assess Atopobium vaginae and Gardnerella vaginalis concentrations in pregnant women of different age groups, gestational age groups, vaginal flora categories and HIV status, and also to determine which DNA concentrations best discriminated between bacterial vaginosis (BV)-positive and non-...
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Background The successful control of malaria vectors requires the control of both the larval and adult stages. The adult control methods through indoor residual spraying (IRS) and use of long-lasting insecticidal nets (LLINs) continue to be widely used with some high measure of success. Larval control methods are also being used by a number of Nati...
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Introduction: Aspiration of bone marrow and direct examination of the smear are both important tools in the study of haematological and non-haematological diseases. Examination of the bone marrow smear allows assessment of cell morphology and enumeration of the cellular elements within the bone marrow allowing confirmation of a suspected clinical d...
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Introduction Visual impairment, specifically eye movement disorders and vestibular dysfunction may have a negative influence on the functional recovery in post-stroke patients. This type of sensory dysfunction may further be associated with poor functional outcome in patients’ post-stroke. Methods In phase 1, a cross-sectional survey (n = 100) wil...
Article
Background: Overweight affects 65% of black South African women. Effective weight management requires accurate measurement or estimation of energy expenditure. Aims: The study aimed to determine, among overweight women, whether measured resting energy expenditure (REE) differs between black and white participants, and the performance of REE esti...
Article
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The available data on antimicrobial stewardship programmes in Africa are scarce. The aims of this study were to assess the implementation of an antimicrobial stewardship programme in a setting with limited infectious disease resources. We implemented a pharmacist-driven, prospective audit and feedback strategy for antimicrobial stewardship on the...
Article
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Background: In Africa, data on the relationship between oncogenic human papillomavirus (HPV) types, immune status and cervical preinvasive lesions are lacking. Methods: We investigated low-risk (lrHPV) and high-risk (hrHPV) HPV types in a cohort of women with cervical intraepithelial neoplasia (CIN) II/III confirmed on histological examination,...
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Background: In the field of spinal cord injury (SCI) research there is an emphasis on the ability to ambulate. Purpose: To determine the ambulation energy expenditure (EE) and factors that affect ambulation EE in SCI participants compared to able-bodied participants. Methods: This was a cross-sectional study. Participants were recruited from seven...
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Background. Serious infections in children are difficult to determine from symptoms and signs alone. Fever is both a marker of insignificant viral infection, as well as more serious bacterial sepsis. Therefore, seeking markers of invasive disease, as well as culture positivity for organisms, has been a goal of paediatricians for many years. In addi...
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Background In the field of spinal cord injury (SCI) research there is an emphasis on the ability to ambulate. Purpose To determine the ambulation energy expenditure (EE) and factors that affect ambulation EE in SCI participants compared to able-bodied participants. Methods This was a cross-sectional study. Participants were recruited from seven S...
Article
Objectives: To describe growth in HIV-infected children on long-term antiretroviral therapy (ART) and to assess social, clinical, immunological and virological factors associated with suboptimal growth. Methods: This observational cohort study included all HIV-infected children at an urban ART site in South Africa who were younger than 5 years a...
Article
Background: The time from birth to the first paediatric surgical consultation of neonates with gastroschisis is a predictor of mortality in dveloping countries. This is contrary to findings in the developed world. We set out to document this relationship within our population. Method: Neonates with gastroschisis who were transferred to Steve Bik...
Article
Abstract Introduction: Teicoplanin is an effective treatment option against methicillin-resistant, Gram-positive bacteria, like Staphylococcus aureus. It is a glycopeptide antibiotic, produced through microbial fermentation, a process resulting in variations in the N-acyl side chain. Concerns that these variations may affect the pharmacokinetic pr...
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Background: The objective of the study was to compare patient characteristics, treatment toxicity and interruptions, and survival in human immunodeficiency virus (HIV)-positive and HIV-negative cervical cancer patients receiving radiation as primary or adjuvant treatment.Method: Demographics, clinical and tumour characteristics, and the outcomes of...
Article
Cervical cancer is the most common cause of cancer-related deaths among South African women. Viral types associated with cervical cancer may differ not only between countries and regions, but possibly also between human immunodeficiency virus (HIV)-infected and noninfected women. In a population with high HIV prevalence, human papillomavirus (HPV)-...
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Outcomes in multiple myeloma (MM) have improved significantly with novel agent therapy and autologous stem cell transplantation (ASCT). ASCTs are typically planned as either tandem or a single transplant with additional stored PBSCs available for a second salvage transplant. To accommodate these strategies, many centers routinely collect and store...
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Background Malaria control in Africa relies heavily on indoor vector management, primarily indoor residual spraying and insecticide treated bed nets. Little is known about outdoor biting behaviour or even the dynamics of indoor biting and infection risk of sleeping household occupants. In this paper we explore the preferred biting sites on the huma...
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Cervical cancer is preventable, but still highly prevalent in South Africa (SA). Screening strategies in the country have been ineffective, and new ways to prevent the disease are needed. To investigate the feasibility of linking cervical cancer screening in adult women to human papillomavirus (HPV) vaccination in schoolgirls. Ten primary schools i...
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There are few published data from South Africa (SA) on the outcomes of black HIV-positive patients receiving chronic haemodialysis. This retrospective study compared the incidences of vascular and infectious morbidity and mortality in black HIV-positive patients with those in a group of HIV-negative patients matched for ethnicity, age and gender. A...
Article
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Abstract Introduction: Teicoplanin is an effective treatment option against methicillin-resistant, Gram-positive bacteria, like Staphylococcus aureus. It is a glycopeptide antibiotic, produced through microbial fermentation, a process resulting in variations in the N-acyl side chain. Concerns that these variations may affect the pharmacokinetic pro...
Article
Full-text available
BACKGROUND. The kinesio-taping method, which is becoming increasingly popular, may provide support and stability to joints and muscles without inhibiting range of motion. OBJECTIVE. The aim of the study was to determine the effect of kinesio-taping of the gluteus medius muscle on x-factor (torso-pelvic separation), ball flight distance and accuracy...
Article
Objectives. To investigate dietary changes occurring with urbanisation of black South African women of different ages and how these changes influence biochemical markers of bone turnover.Design. Biochemical markers of bone turnover and resorption were determined in a subset of subjects living in the North West province of South Africa (one rural an...
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Objective. The objective of this study was to describe the effect of normal saline instillation (NSI) on cardiorespiratory parameters in intubated cardiothoracic patients. Methods. A comparative design was employed to meet the study objectives. Simple random sampling was used to assign patients to study groups, namely a research group (non-NSI) and...