ObjectivesAmong youth in Nairobi, we (1) characterised fertility and contraceptive use dynamics b... more ObjectivesAmong youth in Nairobi, we (1) characterised fertility and contraceptive use dynamics by gender; (2) estimated pregnancy prevalence over the pandemic; and (3) assessed factors associated with unintended pandemic pregnancy for young women.DesignLongitudinal analyses use cohort data collected at three timepoints prior to and during the COVID-19 pandemic: June to August 2019 (pre-pandemic), August to October 2020 (12-month follow-up) and April to May 2021 (18-month follow-up).SettingNairobi, Kenya.ParticipantsAt initial cohort recruitment, eligible youth were aged 15–24 years, unmarried and residing in Nairobi for at least 1 year. Within-timepoint analyses were restricted to participants with survey data per round; trend and prospective analyses were restricted to those with complete data at all three timepoints (n=586 young men, n=589 young women).Primary and secondary outcome measuresPrimary outcomes comprised fertility and contraceptive use for both genders, and pregnancy ...
INTRODUCTION Booming applications of informatics and telecommunication had a major impact on soci... more INTRODUCTION Booming applications of informatics and telecommunication had a major impact on society over the last decades. This Information Age is creating a new frame in which all sectors, including Tropical Medicine, can collect data at high speed and in large volumes. Research projects become more ambitious but must achieve appropriate standards on data quality, leaving a number of challenges for Data Management (DM). METHODS In December 2010, a network of clinical data managers and database developers from Belgium, Burkina Faso, Cambodia, the Democratic Republic of Congo, Kenya, Nepal, The Netherlands, UK and Zambia met at the Institute of Tropical Medicine in Antwerp, with the aim of setting up a platform for knowledge sharing and support on DM activities RESULTS Problems commonly met by clinical data managers include underestimation of the workload by study coordinators and donors; short timelines, which have an impact on the quality of deliverables; late involvement in proje...
ObjectivesContraceptive implant use has grown considerably in the last decade, particularly among... more ObjectivesContraceptive implant use has grown considerably in the last decade, particularly among women in Burkina Faso and Kenya, where implant use is among the highest globally. We aim to quantify the proportion of current implant users who have unsuccessfully attempted implant removal in Burkina Faso and Kenya and document reasons for and location of unsuccessful removal.MethodsWe use nationally representative data collected between 2016 and 2020 from a cross-section of women of reproductive age in Burkina Faso and Kenya to estimate the prevalence of implant use, proportion of current implant users who unsuccessfully attempted removal and proportion of all removal attempts that have been unsuccessful. We describe reasons for and barriers to removal, including the type of facility where successful and unsuccessful attempts occurred.FindingsThe total number of participants ranged from 3221 (2017) to 6590 (2020) in Burkina Faso and from 5864 (2017) to 9469 (2019) in Kenya. Over a 4 ...
Ensuring access to sexual and reproductive health (SRH) services for adolescents is a global prio... more Ensuring access to sexual and reproductive health (SRH) services for adolescents is a global priority, given the detrimental health and economic impact of unintended pregnancies. To examine whether and how COVID-19 affected access to SRH services, we use mixed-methods data from young men and women in Nairobi, Kenya to identify those at greatest risk of contraceptive disruptions during COVID-19 restrictions. Analyses utilize cross-sectional data collected from August to October 2020 from an existing cohort of youth aged 16–26. Unadjusted and adjusted logistic regression examined sociodemographic, contraceptive, and COVID-19-related correlates of contraceptive disruption among users of contraception. Qualitative data were collected concurrently via focus group discussions (n = 64, 8 groups) and in-depth interviews (n = 20), with matrices synthesizing emergent challenges to obtaining contraception by gender. Among those using contraception, both young men (40.4%) and young women (34.6%...
ObjectivesSexual harassment among adolescent girls and young women (AGYW) is a prevalent and unde... more ObjectivesSexual harassment among adolescent girls and young women (AGYW) is a prevalent and understudied form of gender-based violence (GBV) with negative impacts on health and well-being. The COVID-19 pandemic raised global concern about GBV within homes; less is known about how it affected GBV in public spaces.MethodsPresent analyses use cross-sectional data from a cohort of adolescents and young adults residing in Nairobi, Kenya, restricted to female participants. Data were collected August–October 2020 via phone after implementation of COVID-19 restrictions. Prevalence of past-year sexual harassment and harassment relative to COVID-19 restrictions were calculated for overall sample, and by individual, household, and pandemic-related factors. Multivariate negative binomial regression models examine correlates of (1) past-year sexual harassment and (2) increases in sexual harassment relative to COVID-19 restrictions.ResultsOverall, 18.1% of AGYW experienced past-year sexual haras...
ObjectivesAmong nationally representative cross-sections of women in need of contraception from B... more ObjectivesAmong nationally representative cross-sections of women in need of contraception from Burkina Faso, Côte d'Ivoire and Kenya, we aimed to: (1) examine the intersection of past-year physical/sexual intimate partner violence (IPV), emotional IPV and reproductive coercion (RC) and (2) assess the impact of physical/sexual IPV, emotional IPV and RC on women’s contraceptive use outcomes, including current contraceptive use, method type and covert use.DesignThe present analysis uses cross-sectional female data collected in Burkina Faso (December 2020–March 2021), Côte d'Ivoire (October–November 2021) and Kenya (November–December 2020).SettingsBurkina Faso, Côte d'Ivoire and KenyaParticipantsAnalytical samples were restricted to partnered women with contraceptive need who completed a violence module (Burkina Faso n=1863; Côte d'Ivoire n=1105; Kenya n=3390).Primary and secondary outcome measuresThe exposures of interest—past-year emotional IPV, physical/sexual IPV an...
To evaluate strategies to reduce HIV-1 transmission through breastfeeding, a multicentre study in... more To evaluate strategies to reduce HIV-1 transmission through breastfeeding, a multicentre study including a nested randomized controlled trial was implemented in five research sites in West, East and South Africa (The Kesho Bora Study). The aim was to optimize the use of antiretroviral (ARV) drugs during pregnancy, delivery and breastfeeding to prevent mother-to-child transmission of HIV-1 (PMTCT) and to preserve the health of the HIV-1-infected mother. The study included long-term ARV treatment for women with advanced disease, and short-course ARV prophylaxis stopped at delivery for women with early disease. Women with intermediate disease participated in a randomized controlled trial to compare safety and efficacy of triple-ARV prophylaxis prolonged during breastfeeding with short-course ARV prophylaxis stopped at delivery. Between January 2005 and August 2008 a total of 1140 women were enrolled. This paper describes the study design, interventions and protocol amendments introduced to adapt to evolving scientific knowledge, international guidelines and availability of ARV treatment. The paper highlights the successes and challenges during the conduct of the trial. The Kesho Bora Study included one of the few randomized controlled trials to assess safety and efficacy of ARV prophylaxis continued during breastfeeding and the only randomized trial to assess maternal prophylaxis started during pregnancy. The findings have been important for informing international and national guidelines on MTCT prevention in developing countries where, due to poverty, lack of reliable and affordable supply of replacement feed and stigma associated with HIV/AIDS, HIV-infected women have little or no option other than to breastfeed their infants. (ISRCTN71468401).
Background Global evidence indicates increases in gender-based violence (GBV) during the COVID-19... more Background Global evidence indicates increases in gender-based violence (GBV) during the COVID-19 pandemic following mitigation measures, such as stay at home orders. Indirect effects of the pandemic, including income loss, strained social support, and closed or inaccessible violence response services, may further exacerbate GBV and undermine help-seeking. In Kenya and Burkina Faso, as in many settings, GBV was prevalent prior to the COVID-19 pandemic. Studies specific to COVID-impact on GBV in Kenya indicate mixed results and there remains a lack of evidence from Burkina Faso. Our study takes a comprehensive lens by addressing both intimate partner violence (IPV) and non-partner household abuse through the COVID-19 pandemic in two priority settings. Methods Annual, national cross-sections of women ages 15–49 completed survey data collection in November–December 2020 and December 2020–March 2021; the GBV module was limited to one woman per household [Kenya n = 6715; Burkina n = 4065...
Objective Adolescents and youth constitute a significant proportion of the population in developi... more Objective Adolescents and youth constitute a significant proportion of the population in developing nations. Conventional survey methods risk missing adolescents/youth because their family planning/contraception (FP/C) behavior is hidden. Respondent-driven sampling (RDS), a modified chain-referral recruitment sampling approach, was used to reach unmarried adolescents/youth aged 15–24 in Nairobi, Kenya to measure key FP/C indicators. Seeds were selected and issued with three coupons which they used to invite their peers, male or female, to participate in the study. Referred participants were also given coupons to invite others till sample size was achieved. We report on key implementation parameters following standard RDS reporting recommendations. Results A total of 1674 coupons were issued to generate a sample size of 1354. Coupon return rate was 82.7%. Study participants self-administered most survey questions and missing data was low. Differential enrolment by gender was seen wit...
IntroductionAdolescent girls and young women (AGYW) disproportionately experience gender-based vi... more IntroductionAdolescent girls and young women (AGYW) disproportionately experience gender-based violence (GBV), which can increase during emergencies like the COVID-19 pandemic.MethodsA cohort of youth ages 15–24 in Nairobi, Kenya was surveyed at three time points over an 18-month period prior to and during the COVID-19 pandemic: June–August 2019 (prepandemic), August–October 2020 (12-month follow-up) and May 2021 (18-month follow-up). We characterise (1) prevalence, relative timing and help-seeking for leading forms of GBV, (2) GBV trajectories over 18 months and (3) associations of individual, dyad and COVID-related factors on GBV trajectories among AGYW (n=612) in Nairobi, Kenya. Virtual focus group discussions (n=12) and interviews (n=40) contextualise quantitative results.ResultsIntimate partner violence (IPV) prevalence hovered at 17% across time points (ever at pre-pandemic; past 12 months at 12-month follow-up (2020); past 6 months at 18-month follow-up (2021)); non-partner s...
ObjectivesAmong youth in Nairobi, we (1) characterised fertility and contraceptive use dynamics b... more ObjectivesAmong youth in Nairobi, we (1) characterised fertility and contraceptive use dynamics by gender; (2) estimated pregnancy prevalence over the pandemic; and (3) assessed factors associated with unintended pandemic pregnancy for young women.DesignLongitudinal analyses use cohort data collected at three timepoints prior to and during the COVID-19 pandemic: June to August 2019 (pre-pandemic), August to October 2020 (12-month follow-up) and April to May 2021 (18-month follow-up).SettingNairobi, Kenya.ParticipantsAt initial cohort recruitment, eligible youth were aged 15–24 years, unmarried and residing in Nairobi for at least 1 year. Within-timepoint analyses were restricted to participants with survey data per round; trend and prospective analyses were restricted to those with complete data at all three timepoints (n=586 young men, n=589 young women).Primary and secondary outcome measuresPrimary outcomes comprised fertility and contraceptive use for both genders, and pregnancy ...
INTRODUCTION Booming applications of informatics and telecommunication had a major impact on soci... more INTRODUCTION Booming applications of informatics and telecommunication had a major impact on society over the last decades. This Information Age is creating a new frame in which all sectors, including Tropical Medicine, can collect data at high speed and in large volumes. Research projects become more ambitious but must achieve appropriate standards on data quality, leaving a number of challenges for Data Management (DM). METHODS In December 2010, a network of clinical data managers and database developers from Belgium, Burkina Faso, Cambodia, the Democratic Republic of Congo, Kenya, Nepal, The Netherlands, UK and Zambia met at the Institute of Tropical Medicine in Antwerp, with the aim of setting up a platform for knowledge sharing and support on DM activities RESULTS Problems commonly met by clinical data managers include underestimation of the workload by study coordinators and donors; short timelines, which have an impact on the quality of deliverables; late involvement in proje...
ObjectivesContraceptive implant use has grown considerably in the last decade, particularly among... more ObjectivesContraceptive implant use has grown considerably in the last decade, particularly among women in Burkina Faso and Kenya, where implant use is among the highest globally. We aim to quantify the proportion of current implant users who have unsuccessfully attempted implant removal in Burkina Faso and Kenya and document reasons for and location of unsuccessful removal.MethodsWe use nationally representative data collected between 2016 and 2020 from a cross-section of women of reproductive age in Burkina Faso and Kenya to estimate the prevalence of implant use, proportion of current implant users who unsuccessfully attempted removal and proportion of all removal attempts that have been unsuccessful. We describe reasons for and barriers to removal, including the type of facility where successful and unsuccessful attempts occurred.FindingsThe total number of participants ranged from 3221 (2017) to 6590 (2020) in Burkina Faso and from 5864 (2017) to 9469 (2019) in Kenya. Over a 4 ...
Ensuring access to sexual and reproductive health (SRH) services for adolescents is a global prio... more Ensuring access to sexual and reproductive health (SRH) services for adolescents is a global priority, given the detrimental health and economic impact of unintended pregnancies. To examine whether and how COVID-19 affected access to SRH services, we use mixed-methods data from young men and women in Nairobi, Kenya to identify those at greatest risk of contraceptive disruptions during COVID-19 restrictions. Analyses utilize cross-sectional data collected from August to October 2020 from an existing cohort of youth aged 16–26. Unadjusted and adjusted logistic regression examined sociodemographic, contraceptive, and COVID-19-related correlates of contraceptive disruption among users of contraception. Qualitative data were collected concurrently via focus group discussions (n = 64, 8 groups) and in-depth interviews (n = 20), with matrices synthesizing emergent challenges to obtaining contraception by gender. Among those using contraception, both young men (40.4%) and young women (34.6%...
ObjectivesSexual harassment among adolescent girls and young women (AGYW) is a prevalent and unde... more ObjectivesSexual harassment among adolescent girls and young women (AGYW) is a prevalent and understudied form of gender-based violence (GBV) with negative impacts on health and well-being. The COVID-19 pandemic raised global concern about GBV within homes; less is known about how it affected GBV in public spaces.MethodsPresent analyses use cross-sectional data from a cohort of adolescents and young adults residing in Nairobi, Kenya, restricted to female participants. Data were collected August–October 2020 via phone after implementation of COVID-19 restrictions. Prevalence of past-year sexual harassment and harassment relative to COVID-19 restrictions were calculated for overall sample, and by individual, household, and pandemic-related factors. Multivariate negative binomial regression models examine correlates of (1) past-year sexual harassment and (2) increases in sexual harassment relative to COVID-19 restrictions.ResultsOverall, 18.1% of AGYW experienced past-year sexual haras...
ObjectivesAmong nationally representative cross-sections of women in need of contraception from B... more ObjectivesAmong nationally representative cross-sections of women in need of contraception from Burkina Faso, Côte d'Ivoire and Kenya, we aimed to: (1) examine the intersection of past-year physical/sexual intimate partner violence (IPV), emotional IPV and reproductive coercion (RC) and (2) assess the impact of physical/sexual IPV, emotional IPV and RC on women’s contraceptive use outcomes, including current contraceptive use, method type and covert use.DesignThe present analysis uses cross-sectional female data collected in Burkina Faso (December 2020–March 2021), Côte d'Ivoire (October–November 2021) and Kenya (November–December 2020).SettingsBurkina Faso, Côte d'Ivoire and KenyaParticipantsAnalytical samples were restricted to partnered women with contraceptive need who completed a violence module (Burkina Faso n=1863; Côte d'Ivoire n=1105; Kenya n=3390).Primary and secondary outcome measuresThe exposures of interest—past-year emotional IPV, physical/sexual IPV an...
To evaluate strategies to reduce HIV-1 transmission through breastfeeding, a multicentre study in... more To evaluate strategies to reduce HIV-1 transmission through breastfeeding, a multicentre study including a nested randomized controlled trial was implemented in five research sites in West, East and South Africa (The Kesho Bora Study). The aim was to optimize the use of antiretroviral (ARV) drugs during pregnancy, delivery and breastfeeding to prevent mother-to-child transmission of HIV-1 (PMTCT) and to preserve the health of the HIV-1-infected mother. The study included long-term ARV treatment for women with advanced disease, and short-course ARV prophylaxis stopped at delivery for women with early disease. Women with intermediate disease participated in a randomized controlled trial to compare safety and efficacy of triple-ARV prophylaxis prolonged during breastfeeding with short-course ARV prophylaxis stopped at delivery. Between January 2005 and August 2008 a total of 1140 women were enrolled. This paper describes the study design, interventions and protocol amendments introduced to adapt to evolving scientific knowledge, international guidelines and availability of ARV treatment. The paper highlights the successes and challenges during the conduct of the trial. The Kesho Bora Study included one of the few randomized controlled trials to assess safety and efficacy of ARV prophylaxis continued during breastfeeding and the only randomized trial to assess maternal prophylaxis started during pregnancy. The findings have been important for informing international and national guidelines on MTCT prevention in developing countries where, due to poverty, lack of reliable and affordable supply of replacement feed and stigma associated with HIV/AIDS, HIV-infected women have little or no option other than to breastfeed their infants. (ISRCTN71468401).
Background Global evidence indicates increases in gender-based violence (GBV) during the COVID-19... more Background Global evidence indicates increases in gender-based violence (GBV) during the COVID-19 pandemic following mitigation measures, such as stay at home orders. Indirect effects of the pandemic, including income loss, strained social support, and closed or inaccessible violence response services, may further exacerbate GBV and undermine help-seeking. In Kenya and Burkina Faso, as in many settings, GBV was prevalent prior to the COVID-19 pandemic. Studies specific to COVID-impact on GBV in Kenya indicate mixed results and there remains a lack of evidence from Burkina Faso. Our study takes a comprehensive lens by addressing both intimate partner violence (IPV) and non-partner household abuse through the COVID-19 pandemic in two priority settings. Methods Annual, national cross-sections of women ages 15–49 completed survey data collection in November–December 2020 and December 2020–March 2021; the GBV module was limited to one woman per household [Kenya n = 6715; Burkina n = 4065...
Objective Adolescents and youth constitute a significant proportion of the population in developi... more Objective Adolescents and youth constitute a significant proportion of the population in developing nations. Conventional survey methods risk missing adolescents/youth because their family planning/contraception (FP/C) behavior is hidden. Respondent-driven sampling (RDS), a modified chain-referral recruitment sampling approach, was used to reach unmarried adolescents/youth aged 15–24 in Nairobi, Kenya to measure key FP/C indicators. Seeds were selected and issued with three coupons which they used to invite their peers, male or female, to participate in the study. Referred participants were also given coupons to invite others till sample size was achieved. We report on key implementation parameters following standard RDS reporting recommendations. Results A total of 1674 coupons were issued to generate a sample size of 1354. Coupon return rate was 82.7%. Study participants self-administered most survey questions and missing data was low. Differential enrolment by gender was seen wit...
IntroductionAdolescent girls and young women (AGYW) disproportionately experience gender-based vi... more IntroductionAdolescent girls and young women (AGYW) disproportionately experience gender-based violence (GBV), which can increase during emergencies like the COVID-19 pandemic.MethodsA cohort of youth ages 15–24 in Nairobi, Kenya was surveyed at three time points over an 18-month period prior to and during the COVID-19 pandemic: June–August 2019 (prepandemic), August–October 2020 (12-month follow-up) and May 2021 (18-month follow-up). We characterise (1) prevalence, relative timing and help-seeking for leading forms of GBV, (2) GBV trajectories over 18 months and (3) associations of individual, dyad and COVID-related factors on GBV trajectories among AGYW (n=612) in Nairobi, Kenya. Virtual focus group discussions (n=12) and interviews (n=40) contextualise quantitative results.ResultsIntimate partner violence (IPV) prevalence hovered at 17% across time points (ever at pre-pandemic; past 12 months at 12-month follow-up (2020); past 6 months at 18-month follow-up (2021)); non-partner s...
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Papers by Mary Thiongo