Current Organizations / Institutes

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Perpetua Modjadji has a total of 83 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Nutrition and Development of Children in Foundational Learning Spaces in Johannesburg: A Cross-Sectional Study of Dietary Diversity and Nutritional Status

    by Tlhompho Mabukela, Paul Kiprono Chelule, Perpetua Modjadji

    Background: Foundational learning spaces in South Africa, designed to nurture growth and development, continue to grapple with malnutrition, a persistent barrier to the health, cognitive potential, and wellbeing of preschool-aged children, amidst a nutrition transition. Aim: This study assessed dietary diversity, nutritional status, and their associations among children aged 2–5 years attending funded Early Learning Centres (ELCs) in Johannesburg (Region C). Methods: Using systematic random sampling across 33 nutrition-funded ELCs in Region C, we assessed the nutritional status of children aged 2–5 years with WHO Anthro software (z-score cut-offs for undernutrition: stunting, underweight, thinness; overnutrition: overweight, obesity). Dietary diversity scores (DDSs) were derived from a 24 h recall of 16 food groups, classified by primary nutrient contributions (some groups spanning multiple classes), and categorized as low (≤8) or normal (≥9). Associations between DDS and nutritional indicators were analyzed using Poisson regression to estimate adjusted prevalence ratios (aPRs). Results: Despite structured feeding practices, all ELCs reported inadequate nutritional funding, prompting calls for dietitian support. While 27% sourced groceries from wholesalers, most relied on supermarkets and spaza shops; all had cooking infrastructure, but only 12% had food gardens, and 88% expressed interest in establishing them to improve dietary diversity. The mean DDS was 9.47 (±1.07), and 83% of children had a normal DDS (≥9), with common consumption of cereals (100%), vitamin A-rich vegetables (100%), oils (100%), and leafy greens (96%), but limited intake of protein-rich foods like eggs (7%), legumes (19%), and fish (37%). A dual burden of malnutrition was observed: 31% of children were stunted and 30% were overweight or obese. Multivariable analysis showed that boys had significantly lower odds of stunting compared to girls (aPR = 0.38; 95%CI: 0.01–0.74), while younger age (aPR = 0.61; 95%CI: 0.37–0.85) and low DDS (aPR = −0.15; 95%CI: −0.29–−0.06) were independently associated with increased risk of stunting. Age was positively associated with underweight (aPR = 1.27; 95%CI: 0.58–1.96), and thinness was strongly associated with boys (aPR = 17.00; 95%CI: 15.12–18.74), with a marginal association with age. Conclusions: Integrated nutrition strategies are critical to addressing the dual burden of stunting and being overweight in urban ELCs. Strengthening funding, professional dietetic support, and promoting food gardens can enhance dietary diversity and child health outcomes.

  • Open Access

    Non-Communicable Disease Burden and Dietary Determinants in Women of Reproductive Age in Sub-Saharan Africa: A Scoping Review

    by Perpetua Modjadji, Ntevhe Thovhogi, Machoene Derrick Sekgala, Kotsedi Daniel Monyeki

    Background/Objectives: Sub-Saharan Africa (SSA) is experiencing a rising burden of non-communicable diseases (NCDs), projected to surpass infectious diseases as the leading cause of mortality. This shift reflects a complex public health challenge driven by changing dietary patterns and persistent social and gender inequities. Women of reproductive age are particularly vulnerable due to biological and sociocultural factors, with diet playing a central role in NCD development and maternal health. This scoping review explores dietary determinants of NCDs in this population and identifies evidence gaps to support context-specific, gender-responsive interventions. Methods: The review followed the Joanna Briggs Institute methodology and PRISMA-ScR guidelines. A comprehensive search was conducted across PubMed, Scopus, and Google Scholar for studies published between January 2010 and May 2025. After removing duplicates, 577 articles were screened, and 19 met the inclusion criteria. Data were synthesized using descriptive statistics and thematic analysis. An adapted conceptual framework informed by the ecological model was developed to illustrate the multilevel pathways linking dietary determinants to NCD outcomes. Results: Frequent consumption of ultra-processed foods, salty snacks, processed meats, and sugar-sweetened beverages was consistently associated with increased NCD risk. Central obesity was prevalent among nearly half of the women studied, and a high intake of sugary drinks was common across diverse populations. Among pregnant women, overweight was observed in approximately one-quarter of participants, despite the inadequate intake of protein and iron. Vitamin A deficiency was moderately prevalent, and urban residence was linked to a twofold increase in the coexistence of obesity and micronutrient deficiencies. These patterns were shaped by poverty, food insecurity, and the cultural norms influencing dietary behaviors and access to nutritious foods. Conclusion: Dietary determinants significantly contribute to the rising NCD burden among women of reproductive age in SSA, yet adolescent women remain underrepresented in research. Addressing these gaps through culturally sensitive, multisectoral interventions and biomarker-informed longitudinal studies is essential for guiding inclusive policies and sustainable health strategies for this vulnerable population.


  • Open Access

    Curcumin Therapy Reduces Iron Overload and Oxidative Stress in Beta-Thalassemia: Findings from a Meta-Analytic Study

    by Kabelo Mokgalaboni, Wendy N. Phoswa, Perpetua Modjadji, Sogolo L. Lebelo

    The risk of anemia and iron overload is a global concern in beta (β)-thalassemia. The β-thalassemia primary treatment includes blood transfusion and iron chelation therapy; however, both are associated with risks such as anemia, iron depletion, overload, and oxidative stress if not adequately monitored. Therefore, this study investigates the effects of curcumin on anemia, iron overload, and oxidative stress in β-thalassemia. In this meta-analysis, search terms including “curcumin,” “Curcuma longa,” “curcuminoids,” “turmeric,” and “thalassemia” were used in Scopus and PubMed to identify studies published from inception to 15 February 2025. The quantitative analysis was performed using a meta-analysis web tool, and the effect estimates were reported as the mean difference (MD) or standardized mean difference (SMD), along with 95% confidence intervals (CI). Our analysis showed no significant effect on hemoglobin (p = 0.1788) and red blood cell count (p = 0.9534). In contrast, there was a significant decrease in serum ferritin [SMD = −0.24 (−0.46, −0.02), p = 0.0335], non–transferrin bound iron (NTBI), [SMD = −0.59 (−0.98, −0.19), p = 0.0039] and serum iron, [SMD = −0.30 (−0.60, −0.01), p = 0.0425]. Furthermore, there was a reduction in reactive oxygen species; [SMD = −0.83 (−1.23, −0.44), p < 0.0001] and malonaldehydes, [MD = −343.85 nmol/g Hb (−465.94, −221.76), p < 0.0001]. A dose of 500 mg of curcumin was found to be more effective in reducing the NTBI. The findings suggest that curcumin may help reduce iron overload and oxidative stress in β-thalassemia; however, its effect on improving anemia appears to be limited. Given the small sample size of the included studies, we recommend that future research involve larger cohorts and employ rigorous methodologies to evaluate the therapeutic potential of curcumin in β-thalassemia thoroughly. Additionally, we recommend using curcumin-enhancing strategies to improve its bioavailability and administer an optimal yet effective dose.


  • Open Access

    Acute Malnutrition in Under-Five Children in KwaZulu-Natal, South Africa: Risk Factors and Implications for Dietary Quality

    by Meshack Mzamani Mathosi, Lindiwe Priscilla Cele, Mmampedi Mathibe, Perpetua Modjadji

    Background/Objectives: Despite ongoing national interventions, pockets of acute malnutrition persist in rural settings of South Africa, contributing to disproportionate rates of child morbidity and mortality. This study aimed to identify risk factors associated with acute malnutrition among under-five children attending primary healthcare facilities in Msinga, KwaZulu-Natal Province, with a specific focus on dietary diversity and selected infant and young child feeding indicators. Methods: A cross-sectional, facility-based study was conducted among 415 mother–child pairs attending five randomly selected PHC facilities in the Msinga sub-district. Participants were selected using a multistage sampling design from a sampling frame of 18,797 under-five children. Of the 551 mother–child pairs approached; the final analytic sample comprised 415 observations. Data were collected through structured interviews, anthropometric assessments, and dietary diversity scores (DDS). Data were analyzed using Stata 18, and Poisson regression was applied to identify risk factors. Results: The prevalence of acute malnutrition was 29% based on weight-for-height/length z-scores (WHZ/WLZ) and 27% based on mid–upper-arm circumference z-scores (MUACZ). Children aged ≥36 months had significantly higher prevalence of acute malnutrition (aPR = 1.62; 95% CI: 1.15–2.10). Children from households with five or more members had reduced risk (aPR = 0.66; 95% CI: 0.45–0.74), and those born full-term showed a strong protective association (aPR = 0.39; 95% CI: 0.23–0.64). Maternal age was associated with reduced risk, with children of mothers aged 25–34 years (aPR = 0.67; 95% CI: 0.48–0.93) and ≥35 years (aPR = 0.58; 95% CI: 0.35–0.84) experiencing significantly lower prevalence. Mixed feeding was significantly associated with reduced risk (aPR = 0.86; 95% CI: 0.55–1.17), while a DDS ≥4 was protective (aPR = 0.41; 95% CI: 0.04–0.84). Consumption of protein-rich foods was notably low, with only 21% consuming flesh foods and 10% consuming eggs. Conclusions: Acute malnutrition in under-five children was significantly associated with poor diet quality, older age, low household income, and mixed feeding practices. Protective factors included full-term pregnancy, larger households, older maternal age, and adequate dietary diversity, highlighting the importance of targeted, multisectoral interventions.


  • Open Access

    Nutritional Challenges Among Children Under Five in Limpopo Province, South Africa: Complementary Feeding Practices and Dietary Diversity Deficits

    by Tshilidzi Mafhungo, Lindiwe Priscilla Cele, Mmampedi Mathibe, Perpetua Modjadji

    Objective: The aim of this study was to assess complementary feeding practices and dietary diversity in relation to the nutritional status of children under five attending health facilities in the Thabazimbi sub-district, Limpopo Province. Methods: A cross-sectional study was conducted among 409 mother–child pairs. Data on socio-demographics, feeding practices, and anthropometry were collected using validated tools. Nutritional status was assessed using WHO growth standards, and dietary diversity was evaluated using WHO infant and young child feeding (IYCF) indicators and a 24 h dietary recall. Associations were analyzed using prevalence ratios in STATA 18. Results: Among 409 children (median age: 18 months, IQR: 12–24), 38% were stunted, 13% were underweight, 5% were thin, and 17% were overweight/obese. Exclusive breastfeeding was reported in 27%, and only 24% met the minimum dietary diversity (DDS ≥ 4). Complementary feeding practices varied significantly by maternal age, with mixed feeding more common among older mothers and younger mothers more likely to receive feeding advice (p = 0.001). Stunting was associated with being a boy (PR = 1.27; 95% CI: 1.00–1.61), age > 24 months (PR = 0.33; 95% CI: 0.16–0.65), and DDS ≥ 4 (PR = 0.72; 95% CI: 0.52–0.99). Underweight was more prevalent among boys (PR = 2.40; 95% CI: 1.40–4.11), but less likely in children with DDS ≥ 4 (PR = 0.43; 95% CI: 0.20–0.92) and those from spouse-headed households (PR = 0.33; 95% CI: 0.13–0.87). Thinness was associated with DDS ≥ 4 (PR = 2.70; 95% CI: 1.13–6.45) and age 12–24 months (PR = 2.80; 95% CI: 1.02–7.64). Overweight/obesity was linked to age 12–24 months (PR = 1.94; 95% CI: 1.25–3.03) and household income > ZAR 15,000 (PR = 4.09; 95% CI: 2.33–7.17). Conclusions: Complementary feeding and dietary diversity deficits contribute significantly to the dual burden of malnutrition in rural Limpopo, highlighting the need for targeted, context-specific nutrition interventions.


  • Open Access

    Growth Patterns of HIV-Exposed and -Unexposed Infants in African Countries: A Systematic Review and Meta-Analysis

    by Perpetua Modjadji, Kabelo Mokgalaboni, Wendy N. Phoswa, Tebogo Maria Mothiba, Sogolo L. Lebelo

    Background/Objectives: The purpose of this study is to understand the prevalence and odds of poor growth patterns among HIV-exposed but uninfected (HEU) versus HIV-unexposed (HUU) infants in the era of antiretroviral therapy (ART) and prevention of mother-to-child transmission (PMTCT) in Africa. Methods: We reviewed and meta-analyzed studies on growth patterns among HEU versus HUU infants in Africa. Evidence was gathered from the PubMed and Scopus databases following PRISMA guidelines. We independently evaluated the quality of included studies using Newcastle Ottawa guidelines. Data analysis was performed using an online meta-analysis tool, and the results are reported as odds ratios (OR) and prevalence with 95% confidence intervals (CI). Results: A total of 17 studies met the inclusion criteria for this review. The odds of stunting were significantly higher among HEU infants compared to HUU infants, with an odds ratio of 1.56 (95% CI: 1.23–1.97; p < 0.01). The pooled prevalence of stunting was 25% (95% CI: 17–33%) in HEU infants and 19% (95% CI: 12–26%) in HUU infants. In contrast, no significant differences were observed for underweight and wasting. The odds of being underweight in HEU infants compared to HUU was 0.85 (95% CI: 0.47–1.56; p = 0.60), with a pooled prevalence of 11% (95% CI: 5–17%) in HEU and 14% (95% CI: 5–24%) in HUU. Similarly, the odds of wasting were 1.10 (95% CI: 0.78–1.56; p = 0.58), with a pooled prevalence of 9% (95% CI: 3–14%) in HEU and 7% (95% CI: 3–12%) in HUU. Conclusions: Stunting was the most prevalent growth deficit among HEU infants compared to their HUU counterparts, with no significant differences observed in the rates of underweight and wasting. To improve postnatal growth outcomes, especially in the evolving landscape of HIV treatment and prevention, efforts should focus on educating and supporting mothers living with HIV.


  • Open Access

    Systematic review and meta-analysis assessing the status of carotid intima–media thickness and lipid profiles in type 2 diabetes mellitus

    by Reneilwe Given Mashaba, Wendy Phoswa, Eric Maimela, Sogolo Lebelo, Perpetua Modjadji, Kabelo Mokgalaboni

    Objectives: Carotid intima–media thickness (CIMT) is a measurement for subclinical atherosclerosis and has been associated with overall cardiovascular diseases, especially in type 2 diabetes mellitus (T2DM). We aimed to assess the status of carotid health and lipid profile in T2DM. Design: This systematic review and meta-analysis synthesised data published from clinical studies. Data sources: Google Scholar, PubMed and Scopus were searched from inception to 18 January 2024. Eligibility criteria for selecting studies: Studies conducted in patients with T2DM and those without T2DM were included. Studies conducted in T2DM adults evaluating carotid status and lipid profile were considered. Data extraction and synthesis: Two authors independently used standardised methods to comprehensively search, screen and extract data from all relevant studies. The risk of bias was assessed using the Newcastle-Ottawa checklist. Meta-analysis was conducted using Review Manager and metaHun through random effects models. The random effect model was used due to high heterogeneity. Results: Evidence was analysed from 57 studies with a sample size of 29 502 (8254 T2DM and 21 248 people without T2DM). There was a significantly higher CIMT, with a standardised mean difference (SMD) of 1.01 (95% CI 0.75, 1.26, p− 0.79, 95% CI − 0.96, –0.62, p<0.00001). Age, body mass index and hypertension were associated with increased CIMT and TG and decreased HDL-C in T2DM. Additionally, age, gender and hypertension were associated with an increased LDL-C in T2DM. Conclusion: Our findings suggest that an increased CIMT is accompanied by increased TG, TC, LDL-C and HDL-C reduction in patients with T2DM. PROSPERO registration number: CRD42023451731.


  • Open Access

    Effect of Abelmoschus esculentus L. (Okra) on Dyslipidemia: Systematic Review and Meta-Analysis of Clinical Studies

    by Kabelo Mokgalaboni, Wendy N. Phoswa, Tyson T. Mokgalabone, Sanele Dlamini, Ashwell R. Ndhlala, Perpetua Modjadji, Sogolo L. Lebelo

    The global prevalence of cardiovascular diseases (CVDs), including dyslipidemia and atherosclerosis, is rising. While pharmacological treatments for dyslipidemia and associated CVDs exist, not all individuals can afford them, and those who do often experience adverse side effects. Preclinical studies have indicated the potential benefits of Abelmoschus esculentus and its active phytochemicals in addressing dyslipidemia in rodent models of diabetes. However, there is limited clinical evidence on lipid parameters. Thus, this study aimed to assess the potential impact of Abelmoschus esculentus on dyslipidemia. A literature search was performed on PubMed, Scopus, and Cochrane Library for relevant trials published from inception until 11 August 2024. Data analysis was performed using Jamovi software version 2.4.8 and Review Manager (version 5.4), with effect estimates reported as standardized mean differences (SMDs) and 95% confidence intervals (CI). The evidence from eight studies with nine treatment arms showed that Abelmoschus esculentus reduces total cholesterol (TC), SMD = −0.53 (95% CI: −1.00 to −0.07), p = 0.025), compared to placebo. Additionally, triglyceride (TG) was reduced in Abelmoschus esculentus compared to placebo, SMD = −0.24 (95% CI: −0.46 to −0.02), p = 0.035. Furthermore, low-density lipoprotein (LDL) was also reduced, SMD = −0.35 (95% CI: −0.59 to −0.11), p = 0.004 in Abelmoschus esculentus versus placebo. This remedy substantially increased high-density lipoprotein (HDL), SMD = 0.34 (95% CI: 0.07 to 0.61), p = 0.014). Abelmoschus esculentus substantially improved lipid profile in prediabetes, T2D, obesity, and diabetic nephropathy. While the evidence confirms the potential benefits of Abelmoschus esculentus in reducing dyslipidemia, it is important for future clinical studies to standardize the effective dosage for more reliable results. Therefore, future trials should focus on these markers in well-designed trials with sufficient sample sizes. Furthermore, Abelmoschus esculentus can be supplemented to the diet of the relevant populations to alleviate dyslipidemia.


  • Open Access

    Substance Use among School-Going Adolescents and Young Adults in Rural Mpumalanga Province, South Africa

    by Tabeho Godfrey Mmethi, Perpetua Modjadji, Mmampedi Mathibe, Ntevhe Thovhogi, Machoene Derrick Sekgala, Thomas Khomotjo Madiba, Olalekan Ayo-Yusuf

    The ongoing public health crisis of substance use among school adolescents and young adults (AYAs) in South Africa is not new in research parlance, amidst the national policy of drug abuse management in schools. In view of no tangible progress to reduce substance use in high schools in the country, we conducted a cross-sectional quantitative study aimed at investigating substance use among adolescents and young adults in the four public high schools selected through multi-stage sampling in rural Mpumalanga province, South Africa. Data on substance use, demographics, household socio-demographics, and related factors were collected via a validated self-administered questionnaire. Hierarchical logistic regression was performed using STATA 18. The study included 402 AYAs aged between 14 and 23 years (18 ± 1 years), and 45% reported substance use in the last twelve months. Alcohol was the most used substance (74%), followed by cigarettes (12%) and cannabis (11%). AYAs used substances out of social influence, curiosity, to find joy, and to eliminate stress, especially in social events, on the streets, and at home, and reported negative physical health outcomes, mainly hallucinations, sleeping disorders, body weakness, and dry mouths. Hierarchical logistic regression showed that the likelihood of substance use was three times in a particular high school (S4) (AOR = 3.93, 95%CI: 1.72–8.99), twice among the grade 12s (AOR = 2.73, 95%CI: 1.46–5.11), over twenty times in the communities with substance availability (AOR = 22.45, 95%CI: 2.75–183.56), almost ten times among AYAs participating in recreational/sports activities (AOR = 9.74, 95%CI: 4.21–22.52), and twice likely to happen in larger households (AOR = 2.96, 95%CI: 1.57–5.58). Prevention and intervention efforts should consider these specific health concerns to develop targeted strategies for mitigating substance use and its adverse consequences in this vulnerable population towards achieving the United Nations’ Sustainable Development Goal Target 3.5, which aims to strengthen the prevention and treatment of substance abuse, including narcotic drug abuse and the harmful use of alcohol.


  • Open Access

    The Wellbeing of Healthcare Workers during COVID-19 Era in Public Primary Health Facilities in Johannesburg, South Africa

    by Glory Makhado, Busisiwe Ntuli, Lindiwe Zungu, Ntevhe Thovhogi, Peter Modupi Mphekgwana, Sogolo Lucky Lebelo, Sphiwe Madiba, Perpetua Modjadji

    As the world grappled with the COVID-19 pandemic, healthcare workers (HCWs) continued to provide uninterrupted health care service delivery; therefore, this disproportionately affected their wellbeing. Our study explored the wellbeing of HCWs during the COVID-19 era in public health facilities in the City of Johannesburg, Gauteng province, South Africa. A qualitative study was conducted among twenty (20) HCWs through face-to-face in-depth interviews (IDIs) in the form of semi-structured interviews, audiotapes, and transcribed verbatim, and thematically analyzed with NVivo version 10. The findings showed that over half of HCWs (aged between 27 and 60 years) tested positive for COVID-19. Also, one third of HCWs’ family members tested positive while some died due to COVID-19 infection. Informed by the workers’ wellbeing framework, four themes emerged with fourteen sub-themes. Firstly, unsafe work environment was characterized by human resource related challenges such as increased workload; staff shortage; insufficient resources, e.g., personal protective equipment (PPE); poor policies in terms of compensation/allowance for being infected with COVID-19; poor health services; and death of colleagues. Secondly, poor health outcomes were described as strained emotional (psychosocial distress) and physical (respiratory related conditions) wellbeing. Thirdly, home and community environments were negatively impacted by interrupted relationships with family and friends, and experiences of deaths of loved ones. Finally, HCWs engaged personal wellbeing strategies through self-motivation; staying positive; family support; and participating in resilience-promoting extra mural activities to cope during the pandemic. In conclusion, the wellbeing of HCWs was aggravated during the COVID-19 era and led to low morale and compromised healthcare quality. This study advocates for promotion of greater resilience, and psychological and physical safety of HCWs through evidence-based, multilevel-multicomponent interventions at the workplace, home, and community environments in addition to strengthening public health policies and response to future pandemics.