Catherine Mathews
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Previous Organizations / Institutes
The organizations / institutes from the scholar's other articles in the past ten years
Research Subjects
Catherine Mathews has a total of 487 co-authors. Here are the top co-authors by number of shared publications:
Alan J. Flisher
University of Cape Town
25 shared publications- Amanda Jayne Mason-Jones
Department of Health Sciences, University of York, York, England YO10 5DD
12 shared publications - Seth Charles Kalichman
University of Connecticut
12 shared publications - Carl Lombard
Affiliations Biostatistics Research Unit, South African Medical Research Council, Cape Town, South Africa, Division of Epidemiology and Biostatistics, Stellenbosch University, Cape Town, South Africa
9 shared publications Mickey Chopra
South African Medical Research Council, Health Systems Research Unit, Cape Town, South Africa
9 shared publications- Sylvia Kaaya
Department of Psychiatry and Mental Health Muhimbili University of Health and Allied Sciences Dar es Salaam Tanzania
9 shared publications
Latest Publications
- Open Access
- 19 July 2024
- Published by Springer Nature in AIDS and Behavior
- Vol. 28 (10) , 3525-3542
School Dropout, Absenteeism and Coverage of Sexual and Reproductive Health Services in South Africa: Are Those Most at Risk Reached?
School attendance or completion is important for adolescents’ development. Adolescents who drop out or are regularly absent from school are at higher risk of adverse sexual and reproductive health (SRH) outcomes. However, there is little evidence evaluating SRH service coverage among adolescents in and out of school. In the context of a large-scale combination HIV and pregnancy prevention intervention funded by the Global Fund, we compared the SRH intervention coverage and SRH risks among adolescent girls who dropped out of school with those who were still in school or who had completed grade 12 in South Africa. Among those still in school, we compared the SRH intervention coverage and SRH risk profiles of those with high versus low or no absenteeism. In 2017 to 2018, we conducted a household survey of adolescent girls aged 15 to 19 years in six of the ten combination intervention districts. Of 2515 participants, 7.6% had dropped out of school. Among the 1864 participants still in school, 10.8% had high absenteeism. Ever having had sex, and condomless sex were more prevalent among dropouts compared with non-dropouts. Dropouts were more likely to access SRH services such as condoms and contraceptives, except the combination prevention intervention services which were more likely to reach those who had not dropped out and were equally likely to reach those in school with high versus low/no absenteeism. Combination SRH prevention programmes can improve the accessibility of SRH services for adolescents in school/who complete school.
- 19 July 2024
- Published by Springer Nature in AIDS and Behavior
- Vol. 28 (10) , 3525-3542
Open AccessSchool Dropout, Absenteeism and Coverage of Sexual and Reproductive Health Services in South Africa: Are Those Most at Risk Reached?
School attendance or completion is important for adolescents’ development. Adolescents who drop out or are regularly absent from school are at higher risk of adverse sexual and reproductive health (SRH) outcomes. However, there is little evidence evaluating SRH service coverage among adolescents in and out of school. In the context of a large-scale combination HIV and pregnancy prevention intervention funded by the Global Fund, we compared the SRH intervention coverage and SRH risks among adolescent girls who dropped out of school with those who were still in school or who had completed grade 12 in South Africa. Among those still in school, we compared the SRH intervention coverage and SRH risk profiles of those with high versus low or no absenteeism. In 2017 to 2018, we conducted a household survey of adolescent girls aged 15 to 19 years in six of the ten combination intervention districts. Of 2515 participants, 7.6% had dropped out of school. Among the 1864 participants still in school, 10.8% had high absenteeism. Ever having had sex, and condomless sex were more prevalent among dropouts compared with non-dropouts. Dropouts were more likely to access SRH services such as condoms and contraceptives, except the combination prevention intervention services which were more likely to reach those who had not dropped out and were equally likely to reach those in school with high versus low/no absenteeism. Combination SRH prevention programmes can improve the accessibility of SRH services for adolescents in school/who complete school.
- Open Access
- 13 May 2024
- Published by Elsevier in Contemporary Clinical Trials
- Vol. 142, 107575
Developing an international consensus Reporting guideline for intervention Fidelity in Non-Drug, non-surgical trials: The ReFiND protocol
- 13 May 2024
- Published by Elsevier in Contemporary Clinical Trials
- Vol. 142, 107575
Open AccessDeveloping an international consensus Reporting guideline for intervention Fidelity in Non-Drug, non-surgical trials: The ReFiND protocol
- Open Access
- 21 March 2024
- Published by MDPI AG in Adolescents
- Vol. 4 (1) , 185-199
Associations between Household Food Insecurity and Depressive Symptomology among Adolescent Girls and Young Women during the COVID-19 Pandemic in South Africa
Evidence suggests an association between food insecurity and depressive symptomatology; however, little is known about the association between adolescent girls and young women (AGYW) in the context of COVID-19. This study aimed to investigate the relationship between household food insecurity (HFI) and depressive symptomology among AGYW in South Africa during the COVID-19 pandemic. Secondary data analysis was conducted using cross-sectional data collected from the HERStory2 study conducted during the COVID-19 pandemic. The data were collected from 515 AGYW (aged 15–24 years) recruited from six South African districts using a demographic detail and socio-economic questionnaire as well as the Center for Epidemiological Studies Depression (CESD-10) Scale. Data were fitted using a multi-variable robust Poisson regression model and controlled for sociodemographic and health factors. The results suggest that the majority of the sample of AGYW were 20 years old, with 74% exposed to HFI and 30.29% experiencing depressive symptomology. AGYW exposed to HFI were 1.80 times at risk of depressive symptomology compared to those from food-secure households [adjusted risk ratio (aRR): 1.80; 95% CI: 1.35–2.42, p < 0.0001)]. Future pandemic-preparedness strategies should incorporate screening for HFI as a means to identify AGYW who may require psychosocial support.
- 21 March 2024
- Published by MDPI AG in Adolescents
- Vol. 4 (1) , 185-199
Open AccessAssociations between Household Food Insecurity and Depressive Symptomology among Adolescent Girls and Young Women during the COVID-19 Pandemic in South Africa
Evidence suggests an association between food insecurity and depressive symptomatology; however, little is known about the association between adolescent girls and young women (AGYW) in the context of COVID-19. This study aimed to investigate the relationship between household food insecurity (HFI) and depressive symptomology among AGYW in South Africa during the COVID-19 pandemic. Secondary data analysis was conducted using cross-sectional data collected from the HERStory2 study conducted during the COVID-19 pandemic. The data were collected from 515 AGYW (aged 15–24 years) recruited from six South African districts using a demographic detail and socio-economic questionnaire as well as the Center for Epidemiological Studies Depression (CESD-10) Scale. Data were fitted using a multi-variable robust Poisson regression model and controlled for sociodemographic and health factors. The results suggest that the majority of the sample of AGYW were 20 years old, with 74% exposed to HFI and 30.29% experiencing depressive symptomology. AGYW exposed to HFI were 1.80 times at risk of depressive symptomology compared to those from food-secure households [adjusted risk ratio (aRR): 1.80; 95% CI: 1.35–2.42, p < 0.0001)]. Future pandemic-preparedness strategies should incorporate screening for HFI as a means to identify AGYW who may require psychosocial support.
- Open Access
Factors Associated with COVID-19 Vaccine Uptake among Schoolgoing Adolescent Girls and Young Women in South Africa
(1) Background: By October 2022, vaccination rates with at least one dose of a COVID-19 vaccine were low among adolescent girls aged 12–17 (38%) and young women aged 18–34 (45%) in South Africa. This study aimed to measure and identify barriers to and facilitators of motivation to take up, access to, and uptake of COVID-19 vaccines among schoolgoing adolescent girls and young women in two districts in South Africa. (2) Methods: Using the theory of the HIV prevention cascade, we conceptualised the relationship between motivation, access, and uptake of COVID-19 vaccines, and associated barriers. Potential barriers and facilitators were identified using bivariate and multivariable Poisson regression. (3) Results: Among all 2375 participants, access was high (69%), but motivation (49%) and vaccination with at least one COVID-19 vaccine (45%) were lower. Fear of injections was a barrier to vaccine uptake (aRR 0.85 95% CI 0.82–0.88), while being tested for COVID-19 (aRR 2.10 95% CI 1.85–2.38) and believing that the COVID-19 vaccine was safe (aRR 1.31 95% CI 1.18–1.44) and would prevent you from getting very sick (aRR 1.11 95% CI 1.04–1.19) were facilitators. (4) Conclusions: The controversy about the value of vaccinating adolescents and the delay in vaccine rollout for adolescents and young adults may have contributed to fears about the safety and efficacy of COVID-19 vaccines, as well as a lack of motivation to get vaccinated.
Open AccessFactors Associated with COVID-19 Vaccine Uptake among Schoolgoing Adolescent Girls and Young Women in South Africa
(1) Background: By October 2022, vaccination rates with at least one dose of a COVID-19 vaccine were low among adolescent girls aged 12–17 (38%) and young women aged 18–34 (45%) in South Africa. This study aimed to measure and identify barriers to and facilitators of motivation to take up, access to, and uptake of COVID-19 vaccines among schoolgoing adolescent girls and young women in two districts in South Africa. (2) Methods: Using the theory of the HIV prevention cascade, we conceptualised the relationship between motivation, access, and uptake of COVID-19 vaccines, and associated barriers. Potential barriers and facilitators were identified using bivariate and multivariable Poisson regression. (3) Results: Among all 2375 participants, access was high (69%), but motivation (49%) and vaccination with at least one COVID-19 vaccine (45%) were lower. Fear of injections was a barrier to vaccine uptake (aRR 0.85 95% CI 0.82–0.88), while being tested for COVID-19 (aRR 2.10 95% CI 1.85–2.38) and believing that the COVID-19 vaccine was safe (aRR 1.31 95% CI 1.18–1.44) and would prevent you from getting very sick (aRR 1.11 95% CI 1.04–1.19) were facilitators. (4) Conclusions: The controversy about the value of vaccinating adolescents and the delay in vaccine rollout for adolescents and young adults may have contributed to fears about the safety and efficacy of COVID-19 vaccines, as well as a lack of motivation to get vaccinated.
- 31 July 2023
- Published by Springer Nature in Journal of Behavioral Medicine
- Vol. 47 (1) , 135-143
The three-item patient-reported instrument for retrospective adherence in resource constrained settings: reliability, validity and potential utility
Introduction: Patient-report instruments remain the most feasible and sustainable approaches for monitoring medication adherence in clinical settings. However, questions of their reliability and validity persist. Studies suggest that the 3-item instrument for retrospective adherence (IRA) developed by Wilson et al. offers a viable option for clinically monitoring medication adherence. Here we report the reliability and validity of the IRA among patients recruited from community-based HIV clinics and antiretroviral therapy (ART) dispensaries in a resource constrained township in Cape Town, South Africa. Methods: Women (n = 794) and men (n = 228) receiving ART completed the IRA at three time points: (a) in a face-to-face administration at enrollment (b) in1-week phone interview and (c) 1-month phone interview. Participants also provided contemporaneous blood samples for HIV viral load testing as a clinical outcome and unannounced phone-based pill counts as an objective assessment of ART adherence. Results: The IRA was internally consistent and showed evidence of time stability. The IRA also demonstrated validity with respect to pill count adherence, correlates of adherence, and HIV viral load. Response operating curve analysis yielded an area under the curve of 0.646, using 75% adherence as the cut-off, with 0.637 sensitivity and 0.567 specificity. Conclusions: The IRA demonstrated reliability, construct validity and criterion validity in a resource constrained setting, supporting use of the IRA in research and clinical care.
- 31 July 2023
- Published by Springer Nature in Journal of Behavioral Medicine
- Vol. 47 (1) , 135-143
The three-item patient-reported instrument for retrospective adherence in resource constrained settings: reliability, validity and potential utility
Introduction: Patient-report instruments remain the most feasible and sustainable approaches for monitoring medication adherence in clinical settings. However, questions of their reliability and validity persist. Studies suggest that the 3-item instrument for retrospective adherence (IRA) developed by Wilson et al. offers a viable option for clinically monitoring medication adherence. Here we report the reliability and validity of the IRA among patients recruited from community-based HIV clinics and antiretroviral therapy (ART) dispensaries in a resource constrained township in Cape Town, South Africa. Methods: Women (n = 794) and men (n = 228) receiving ART completed the IRA at three time points: (a) in a face-to-face administration at enrollment (b) in1-week phone interview and (c) 1-month phone interview. Participants also provided contemporaneous blood samples for HIV viral load testing as a clinical outcome and unannounced phone-based pill counts as an objective assessment of ART adherence. Results: The IRA was internally consistent and showed evidence of time stability. The IRA also demonstrated validity with respect to pill count adherence, correlates of adherence, and HIV viral load. Response operating curve analysis yielded an area under the curve of 0.646, using 75% adherence as the cut-off, with 0.637 sensitivity and 0.567 specificity. Conclusions: The IRA demonstrated reliability, construct validity and criterion validity in a resource constrained setting, supporting use of the IRA in research and clinical care.
- 19 September 2022
- Published by Taylor & Francis in Vulnerable Children and Youth Studies
- Vol. 18 (2) , 218-230
From resilient girls to (more) resilient women: A mixed-methods study examining narratives of resilience among South African young women
Adolescence and emerging adulthood are times of heightened adversity for South African girls and young women due to structural disadvantage. In this mixed-methods study, we explored lived experiences of resilience among a sample of 377 South African girls and young women (15–24 years) who completed a quantitative cross-sectional survey that included a validated measure of resilience. Quantitative analyses included descriptive statistics and an independent sample t-test to assess differences in resilience. These analyses informed the development of a semi-structured qualitative interview agenda. A purposive sample of 21 South African girls and young women (15–24 years) from the same survey area participated in in-depth interviews. Interviews were analyzed for perceptions of difference in resilience by age and narratives of resilience during transitions to adulthood. Survey results indicated younger participants (15–17 years) perceived themselves to be less resilient than older participants (18–24 years). Qualitative interview results supported the survey results, and pointed to a broader difference in perceived resilience between younger women and older women. Programming and policy implications for future resilience research among this population are discussed.
- 19 September 2022
- Published by Taylor & Francis in Vulnerable Children and Youth Studies
- Vol. 18 (2) , 218-230
From resilient girls to (more) resilient women: A mixed-methods study examining narratives of resilience among South African young women
Adolescence and emerging adulthood are times of heightened adversity for South African girls and young women due to structural disadvantage. In this mixed-methods study, we explored lived experiences of resilience among a sample of 377 South African girls and young women (15–24 years) who completed a quantitative cross-sectional survey that included a validated measure of resilience. Quantitative analyses included descriptive statistics and an independent sample t-test to assess differences in resilience. These analyses informed the development of a semi-structured qualitative interview agenda. A purposive sample of 21 South African girls and young women (15–24 years) from the same survey area participated in in-depth interviews. Interviews were analyzed for perceptions of difference in resilience by age and narratives of resilience during transitions to adulthood. Survey results indicated younger participants (15–17 years) perceived themselves to be less resilient than older participants (18–24 years). Qualitative interview results supported the survey results, and pointed to a broader difference in perceived resilience between younger women and older women. Programming and policy implications for future resilience research among this population are discussed.
- Open Access
- 23 July 2022
- Published by Elsevier in Contraception
- Vol. 116, 51-58
Participation in an HIV prevention intervention and access to and use of contraceptives among young women: A cross sectional analysis in six South African districts
- 23 July 2022
- Published by Elsevier in Contraception
- Vol. 116, 51-58
Open AccessParticipation in an HIV prevention intervention and access to and use of contraceptives among young women: A cross sectional analysis in six South African districts
- Open Access
- 21 May 2022
- Published by Springer Nature in BMC Public Health
- Vol. 22 (1) , 1-17
Safe spaces for beneficiaries of a combination HIV prevention intervention for adolescent girls and young women in South Africa: access, feasibility, and acceptability
Safe Spaces are a feature of combination HIV prevention interventions for adolescent girls and young women (AGYW) in South Africa. We investigated whether AGYW at risk for adverse sexual and reproductive health (SRH) outcomes accessed Safe Spaces that were part of an intervention, as well as their feasibility and acceptability. In December 2020 to February 2021, as part of a process evaluation of a combination HIV prevention intervention, we randomly sampled 2160 AGYW intervention beneficiaries aged 15–24 years from 6 of the 12 intervention districts. We invited them to participate in a phone survey, with questions about their vulnerability to adverse SRH outcomes, and participation in intervention components including Safe Spaces. We examined factors associated with use of Safe Spaces using bivariate analyses and Pearson’s chi squared tests. We also conducted in-depth interviews with 50 AGYW beneficiaries, 27 intervention implementers, 4 health workers, 7 social workers, and 12 community stakeholders, to explore perceptions and experiences of the intervention. Thematic analysis of the qualitative data was performed. At least 30 Safe Spaces were established across 6 districts. Five hundred fifteen of two thousand one hundred sixty sampled AGYW participated in the survey of whom 22.6% visited a Safe Space, accessing HIV testing (52.2%), mobile health services (21.2%) and counselling for distress (24.8%) while there. Beneficiaries of lower socioeconomic status (SES) were less likely to have visited a Safe Space, compared with those of higher SES (13.6% versus 25.3%; p < 0.01). Implementers described political, structural and financial challenges in identifying and setting up Safe Spaces that were safe, accessible and adequately-resourced, and challenges with AGYW not utilising them as expected. AGYW shared positive views of Safe Spaces, describing benefits such as access to computers and the internet, support with homework and job and education applications, and a space in which to connect with peers. AGYW are attracted to Safe Spaces by educational and employment promoting interventions and recreational activities, and many will take up the offer of SRH services while there. The poorest AGYW are more likely to be excluded, therefore, an understanding of the obstacles to, and enablers of their inclusion should inform Safe Space intervention design.
- 21 May 2022
- Published by Springer Nature in BMC Public Health
- Vol. 22 (1) , 1-17
Open AccessSafe spaces for beneficiaries of a combination HIV prevention intervention for adolescent girls and young women in South Africa: access, feasibility, and acceptability
Safe Spaces are a feature of combination HIV prevention interventions for adolescent girls and young women (AGYW) in South Africa. We investigated whether AGYW at risk for adverse sexual and reproductive health (SRH) outcomes accessed Safe Spaces that were part of an intervention, as well as their feasibility and acceptability. In December 2020 to February 2021, as part of a process evaluation of a combination HIV prevention intervention, we randomly sampled 2160 AGYW intervention beneficiaries aged 15–24 years from 6 of the 12 intervention districts. We invited them to participate in a phone survey, with questions about their vulnerability to adverse SRH outcomes, and participation in intervention components including Safe Spaces. We examined factors associated with use of Safe Spaces using bivariate analyses and Pearson’s chi squared tests. We also conducted in-depth interviews with 50 AGYW beneficiaries, 27 intervention implementers, 4 health workers, 7 social workers, and 12 community stakeholders, to explore perceptions and experiences of the intervention. Thematic analysis of the qualitative data was performed. At least 30 Safe Spaces were established across 6 districts. Five hundred fifteen of two thousand one hundred sixty sampled AGYW participated in the survey of whom 22.6% visited a Safe Space, accessing HIV testing (52.2%), mobile health services (21.2%) and counselling for distress (24.8%) while there. Beneficiaries of lower socioeconomic status (SES) were less likely to have visited a Safe Space, compared with those of higher SES (13.6% versus 25.3%; p < 0.01). Implementers described political, structural and financial challenges in identifying and setting up Safe Spaces that were safe, accessible and adequately-resourced, and challenges with AGYW not utilising them as expected. AGYW shared positive views of Safe Spaces, describing benefits such as access to computers and the internet, support with homework and job and education applications, and a space in which to connect with peers. AGYW are attracted to Safe Spaces by educational and employment promoting interventions and recreational activities, and many will take up the offer of SRH services while there. The poorest AGYW are more likely to be excluded, therefore, an understanding of the obstacles to, and enablers of their inclusion should inform Safe Space intervention design.
- Open Access
- 26 March 2022
- Published by Springer Nature in Child and Adolescent Psychiatry and Mental Health
- Vol. 16 (1) , 1-16
Intersections between COVID-19 and socio-economic mental health stressors in the lives of South African adolescent girls and young women
Background: In contexts where poverty and mental health stressors already interact to negatively impact the most vulnerable populations, COVID-19 is likely to have worsened these impacts. Before the COVID-19 pandemic, adolescent girls and young women (AGYW) in South Africa already faced intersecting mental health stressors and vulnerabilities. It is critical to understand how additional challenges brought on by COVID-19 have intersected with existing vulnerabilities and mental health risks AGYW faced, particularly given the intersections between psychological distress and increased risk behaviours that impact sexual and reproductive health. We aimed to examine socio-economic and mental health impacts of COVID-19 on South African AGYW in order to understand how additional challenges brought on by COVID-19 have intersected with existing challenges, compounding AGYW vulnerabilities. Methods: Using qualitative and quantitative methods, framed by the syndemic theory, we examined the intersections between mental health and the COVID-19 epidemic amongst AGYW in six districts of South Africa characterised by high rates of HIV, teenage pregnancy and socio-economic hardship. Between November 2020 and March 2021 we conducted a cross-sectional telephone survey with 515 AGYW, and in-depth interviews with 50 AGYW, aged 15 to 24 years. Results: Our findings reveal how COVID-19 restrictions led to increased experiences of stress and anxiety. Poor mental health was compounded by strained family relationships, increased fear of domestic violence, household unemployment, economic stress and food insecurity. Respondents described feelings of boredom, frustration, isolation, loneliness, fear and hopelessness. However, despite the multitude of challenges, some AGYW articulated emotional resilience, describing ways in which they coped and retained hope. Conclusion: Various psycho-social risk factors already disproportionally affect the mental health of AGYW in these communities; the COVID-19 pandemic intersects with these pre-existing social and environmental factors. Understanding strategies AGYW have used to positively cope with the uncertainty of COVID-19 amongst an array of pre-existing mental health stressors, is key in informing efforts to respond to their needs. Multisectoral interventions are needed to address the drivers of poor mental health among AGYW, and bolster healthy coping mechanisms; interventions seeking to mitigate the mental health impacts on this vulnerable population need to be responsive to the unpredictable pandemic environment.
- 26 March 2022
- Published by Springer Nature in Child and Adolescent Psychiatry and Mental Health
- Vol. 16 (1) , 1-16
Open AccessIntersections between COVID-19 and socio-economic mental health stressors in the lives of South African adolescent girls and young women
Background: In contexts where poverty and mental health stressors already interact to negatively impact the most vulnerable populations, COVID-19 is likely to have worsened these impacts. Before the COVID-19 pandemic, adolescent girls and young women (AGYW) in South Africa already faced intersecting mental health stressors and vulnerabilities. It is critical to understand how additional challenges brought on by COVID-19 have intersected with existing vulnerabilities and mental health risks AGYW faced, particularly given the intersections between psychological distress and increased risk behaviours that impact sexual and reproductive health. We aimed to examine socio-economic and mental health impacts of COVID-19 on South African AGYW in order to understand how additional challenges brought on by COVID-19 have intersected with existing challenges, compounding AGYW vulnerabilities. Methods: Using qualitative and quantitative methods, framed by the syndemic theory, we examined the intersections between mental health and the COVID-19 epidemic amongst AGYW in six districts of South Africa characterised by high rates of HIV, teenage pregnancy and socio-economic hardship. Between November 2020 and March 2021 we conducted a cross-sectional telephone survey with 515 AGYW, and in-depth interviews with 50 AGYW, aged 15 to 24 years. Results: Our findings reveal how COVID-19 restrictions led to increased experiences of stress and anxiety. Poor mental health was compounded by strained family relationships, increased fear of domestic violence, household unemployment, economic stress and food insecurity. Respondents described feelings of boredom, frustration, isolation, loneliness, fear and hopelessness. However, despite the multitude of challenges, some AGYW articulated emotional resilience, describing ways in which they coped and retained hope. Conclusion: Various psycho-social risk factors already disproportionally affect the mental health of AGYW in these communities; the COVID-19 pandemic intersects with these pre-existing social and environmental factors. Understanding strategies AGYW have used to positively cope with the uncertainty of COVID-19 amongst an array of pre-existing mental health stressors, is key in informing efforts to respond to their needs. Multisectoral interventions are needed to address the drivers of poor mental health among AGYW, and bolster healthy coping mechanisms; interventions seeking to mitigate the mental health impacts on this vulnerable population need to be responsive to the unpredictable pandemic environment.