Theory-based formative research on oral rehydration salts and zinc use in Lusaka, Zambia.

BACKGROUND: A theoretically grounded formative research study was carried out to investigate behaviour related to the use of Oral Rehydration Salts (ORS) and zinc tablets. The purpose was to inform the design of the behaviour change component of the Programme for Awareness and Elimination of Diarrhoea in Lusaka Province, Zambia, which aims to reduce childhood morbidity and mortality from diarrhoeal disease. METHODS: Fourteen behaviour trials were conducted among caregivers of children under-five with diarrhoea. Caregivers were recruited from two clinics situated in rural and peri-urban Lusaka. Trials took ten days and data were captured using video, observation and repeated interviews. Additional data were collected through focus group discussions with mothers, observations in clinics and pharmacies and interviews with clinic and pharmacy staff. Findings were organised according to categories of behavioural determinants from Evo-Eco theory. RESULTS: Participants were all familiar with ORS and most knew its purpose. ORS use was motivated by symptoms of dehydration, rather than the start of a diarrhoea episode, and was stopped when the child had visibly recovered energy. Only four of 14 behaviour trial participants were observed to correctly prepare ORS. Errors were mainly associated with measurement, resulting in a solution that was too concentrated. ORS was not observed to be given to children at clinics. Although zinc was unknown in this population, it was positively received by mothers keen to learn whether zinc would work better than alternative treatments to stop diarrhoea. CONCLUSIONS: ORS was sub-optimally prepared and used at home. It was not used while waiting to be seen at a clinic. In homes, the behaviour change intervention should promote early and continued use of correctly prepared ORS. In the longer-term, these behaviours may best be encouraged by changing the product design or sachet size. Despite its unfamiliarity, this population was well disposed to the use of zinc as a treatment for diarrhoea; when zinc is new to a population, promoting zinc as a solution to stopping diarrhoea, which mothers seek, may drive initial trial. Ensuring the availability of zinc in public clinics and private pharmacies prior to commencement of any promotion activities is crucial

Performance of machine learning classifiers in classifying stunting among under-five children in Zambia

Stunting is a global public health issue. We sought to train and evaluate machine learning (ML) classification algorithms on the Zambia Demographic Health Survey (ZDHS) dataset to predict stunting among children under the age of five in Zambia. We applied Logistic regression (LR), Random Forest (RF), SV classification (SVC), XG Boost (XgB) and Naïve Bayes (NB) algorithms to predict the probability of stunting among children under five years of age, on the 2018 ZDHS dataset. We calibrated predicted probabilities and plotted the calibration curves to compare model performance. We computed accuracy, recall, precision and F1 for each machine learning algorithm. About 2327 (34.2%) children were stunted. Thirteen of fifty-eight features were selected for inclusion in the model using random forest. Calibrating the predicted probabilities improved the performance of machine learning algorithms when evaluated using calibration curves. RF was the most accurate algorithm, with an accuracy score of 79% in the testing and 61.6% in the training data while Naïve Bayesian was the worst performing algorithm for predicting stunting among children under five in Zambia using the 2018 ZDHS dataset. ML models aids quick diagnosis of stunting and the timely development of interventions aimed at preventing stunting

Disentangling the effects of a multiple behaviour change intervention for diarrhoea control in Zambia: a theory-based process evaluation.

BACKGROUND: Diarrhoea is a leading cause of child death in Zambia. As elsewhere, the disease burden could be greatly reduced through caregiver uptake of existing prevention and treatment strategies. We recently reported the results of the Komboni Housewives intervention which tested a novel strategy employing motives including affiliation and disgust to improve caregiver practice of four diarrhoea control behaviours: exclusive breastfeeding; handwashing with soap; and correct preparation and use of oral rehydration salts (ORS) and zinc. The intervention was delivered via community events (women's forums and road shows), at health clinics (group session) and via radio. A cluster randomised trial revealed that the intervention resulted in a small improvement in exclusive breastfeeding practices, but was only associated with small changes in the other behaviours in areas with greater intervention exposure. This paper reports the findings of the process evaluation that was conducted alongside the trial to investigate how factors associated with intervention delivery and receipt influenced caregiver uptake of the target behaviours. METHODS: Process data were collected from the eight peri-urban and rural intervention areas throughout the six-month implementation period and in all 16 clusters 4-6 weeks afterwards. Intervention implementation (fidelity, reach, dose delivered and recruitment strategies) and receipt (participant engagement and responses, and mediators) were explored through review of intervention activity logs, unannounced observation of intervention events, semi-structured interviews, focus groups with implementers and intervention recipients, and household surveys. Evaluation methods and analyses were guided by the intervention's theory of change and the evaluation framework of Linnan and Steckler. RESULTS: Intervention reach was lower than intended: 39% of the surveyed population reported attending one or more face-to-face intervention event, of whom only 11% attended two or more intervention events. The intervention was not equally feasible to deliver in all settings: fewer events took place in remote rural areas, and the intervention did not adequately penetrate communities in several peri-urban sites where the population density was high, the population was slightly higher socio-economic status, recruitment was challenging, and numerous alternative sources of entertainment existed. Adaptations made by the implementers affected the fidelity of implementation of messages for all target behaviours. Incorrect messages were consequently recalled by intervention recipients. Participants were most receptive to the novel disgust and skills-based interactive demonstrations targeting exclusive breastfeeding and ORS preparation respectively. However, initial disgust elicitation was not followed by a change in associated psychological mediators, and social norms were not measurably changed. CONCLUSIONS: The lack of measured behaviour change was likely due to issues with both the intervention's content and its delivery. Achieving high reach and intensity in community interventions delivered in diverse settings is challenging. Achieving high fidelity is also challenging when multiple behaviours are targeted for change. Further work using improved tools is needed to explore the use of subconscious motives in behaviour change interventions. To better uncover how and why interventions achieve their measured effects, process evaluations of complex interventions should develop and employ frameworks for investigation and interpretation that are structured around the intervention's theory of change and the local context. TRIAL REGISTRATION: The study was registered as part of the larger trial on 5 March 2014 with ClinicalTrials.gov: NCT02081521

Contribution of Maternal Immunity to Decreased Rotavirus Vaccine Performance in Low- and Middle-Income Countries

ABSTRACT The role of maternal immunity, received by infants either transplacentally or orally from breast milk, in rotavirus vaccine (RV) performance is evaluated here. Breastfeeding withholding has no effect on vaccine responses, but higher levels of transplacental rotavirus-specific IgG antibody contribute to reduced vaccine seroconversion. The gaps in knowledge on the factors associated with low RV efficacy in low- and middle-income countries (LMIC) remain, and further research is needed to shed more light on these issues

Assessing peri-urban sanitation quality using a theoretically derived composite measure in Lusaka, Zambia

Abstract Despite ongoing debates about what constitutes adequate sanitation, there is a lack of sanitation quality measures that are theoretically grounded in ways that allow empirical comparisons of quality across different types of sanitation. The Healthy Sanitation Framework (HSF) was developed to capture universal aspects of sanitation quality from a public health perspective. From this, the Peri-Urban Healthy Toilet Index (PUHTI) was created for measuring on-site, peri-urban sanitation quality. This PUHTI score was used to assess sanitation quality in a peri-urban area in Lusaka, Zambia. The HSF identified five categories for capturing sanitation quality: hygiene, use, sustainability, desirability, and accessibility. A composite index derived from these categories had high reliability and plausible validity, despite barriers to rigorously evaluating validity. Applying the PUHTI tool showed that while 87% of toilets were classified as ‘improved, but shared,’ there were frequent concerns about doors that could not be locked, dirty user interfaces, unhygienic containment, limited emptyability, and lack of handwashing facilities. The HSF allows granular measures of sanitation quality to be developed in any setting using a reproducible and theoretically grounded process. However, lack of a unified basis on which to compare different types of sanitation overall or evidence to compare within narrower categories currently limits comparisons across types of sanitation.</jats:p

Implementing large-scale health system strengthening interventions: experience from the better health outcomes through mentoring and assessments (BHOMA) project in Zambia

Background Under the Doris Duke Charitable Foundation’s African Health Initiative, five Population Health Implementation and Training partnerships were established as long-term health system strengthening projects in five Sub-Saharan Countries. In Zambia, the Centre for Infectious Disease Research in Zambia began to implement the Better Health Outcomes through Mentorship and Assessments (BHOMA) in 2009. This was a combined community and health systems project involving 42 public facilities and their catchment populations. The impact of this intervention is reported elsewhere, but less attention has been paid to evaluation approaches that generate an understanding of the forces shaping the intervention. This paper is focused on understanding the implementation practices of the BHOMA intervention in Zambia. Methods Qualitative approaches were employed to understand and explain health systems intervention implementation practices between 2014 and 2016. We purposively sampled six clinics out of the 42 that participated in the BHOMA project within three districts of Lusaka province in Zambia. At the facility-level we targeted health centre in-charges, health workers, and community health workers. In-depth interviews (n = 22), focus group discussions (n = 3) and observations were also collected and synthesised. Results The major health system challenges addressed by the BHOMA project included poor infrastructure, lack of human resources, poor service delivery, long distances to health centres and inadequate health information systems. In order to implement this in the districts it was necessary to engage with the Ministry of Health and district managers, however, these partners were not actively engaged in intervention design There was great variation in perceptions about the BHOMA interventions. The implementation team considered BHOMA as a ‘proof of concept pilot project’, running parallel to the public health system, while district health officials from the Ministry of health understood it as a ‘long term partner’ and were therefore resistant to the short-term nature of the intervention. Conclusions The Normalization Process Theory provided a useful framework to understand and explain implementation processes for the BHOMA intervention in Zambia. We clearly demonstrated the applicability of all the four main components of the NPT: coherence (or sense-making); cognitive participation (or engagement); collective action and reflexive monitoring. We demonstrated how complex and dynamic the intervention played out among different actors and how implementation was affected by difference in appreciation and interpretation of the goal of the intervention. Our findings support the growing demand for process evaluations to use theory based approaches to examine how context interact with local interventions to affect outcomes intended or not. Trial registration ClinicalTrials.gov Identifier: NCT01942278 . Registered: September 13, 2013 (Retrospectively registered)

Understanding linkage to care with HIV self-test approach in Lusaka, Zambia - A mixed method approach

HIV self-testing (HIVST) is a novel approach designed to assist in achieving the goal of at least 90% of the population that learn their HIV status. A self-test user with a positive test is required to visit a clinic to link into HIV care, yet little is known about patient preferences for linkage strategies. We examined the intention to link to care amongst potential HIVST users and the suitability of three linkage to care strategies in Lusaka Province, Zambia

Tackling the hard problems: implementation experience and lessons learned in newborn health from the African Health Initiative

Background The Doris Duke Charitable Foundation’s African Health Initiative supported the implementation of Population Health Implementation and Training (PHIT) Partnership health system strengthening interventions in designated areas of five countries: Ghana, Mozambique, Rwanda, Tanzania, and Zambia. All PHIT programs included health system strengthening interventions with child health outcomes from the outset, but all increasingly recognized the need to increase focus to improve health and outcomes in the first month of life. This paper uses a case study approach to describe interventions implemented in newborn health, compare approaches, and identify lessons learned across the programs’ collective implementation experience. Methods Case studies were built using quantitative and qualitative methods, applying the World Health Organization Health Systems Strengthening Framework, and maternal, newborn and child health continuum of care framework. We identified the following five primary themes in health systems strengthening intervention strategies used to target improvement in newborn health, which were incorporated by all PHIT projects with varying results: health service delivery at the community level (Tanzania), combining community and health facility level interventions (Zambia), participatory information feedback and clinical training (Ghana), performance review and enhancement (Mozambique), and integrated clinical and system-level improvement (Rwanda), and used individual case studies to illustrate each of these themes. Results Tanzania and Zambia included significant community-based components, including mobilization and sensitization for increased uptake of essential services, while Ghana, Mozambique, and Rwanda focused more efforts on improving the quality of services delivered once a patient enters a health facility. All countries included aspects that improved communication across levels of the health system, whether through district-wide data sharing and peer learning networks in Mozambique and Rwanda, or improved referral processes and systems in Tanzania, Zambia, and Ghana. Conclusion Key lessons learned include the importance of focusing intervention components on addressing drivers of neonatal mortality across the maternal and newborn care continuum at all levels of the health system, matching efforts to improve service utilization with provision of high quality facility-based services, and the critical role of leadership to catalyze improvements in newborn health

Theory-driven formative research on on-site, shared sanitation quality improvement among landlords and tenants in peri-urban Lusaka, Zambia.

Rapid, unplanned urbanization in low-income countries is leading to increasing problems of dealing with human waste. On-site sanitation systems are often rudimentary, unhygienic, and poorly maintained. In-depth, on-site interactive interviews were conducted with 33 landlords and 33 tenants in a neighborhood in peri-urban Lusaka to understand on-site, shared sanitation quality improvement behaviors and preferences. Respondents were asked about housing characteristics, toilet histories, and financial decision-making. Improved, shared toilets were common (79%), but many were of low quality and poorly cleaned. Poor coordination among tenants, barriers to communication between landlords and tenants, and landlords viewing sanitation as a required basic service to provide instead of something for which tenants will pay more rent all limit the quality of sanitation in this setting. Landlord-directed interventions targeting non-health motivations for sanitation improvement and introducing effective cleaning systems may increase peri-urban sanitation quality

The social dynamics around shared sanitation in an informal settlement of Lusaka, Zambia

Abstract This study explored the social dynamics affecting collective management of shared sanitation in the Bauleni compound of Lusaka, Zambia. In-depth interviews were conducted with landlords (n = 33) and tenants (n = 33). Elinor Ostrom's eight design principles for the management of common-pool resources was used as a framework to analyse the data. Social capital within plots was also assessed. Pit latrines were predominantly shared by landlords and tenants on residential plots. However, unwelcome non-plot members also used the latrines due to a lack of physical boundaries. Not all plot members fulfilled their cleaning responsibilities equally, thereby compromising the intended benefits for those conforming. Landlords typically decided on latrine improvements independent of tenants. Latrines were not systematically monitored or maintained, but punishment for non-conformers was proportionate to the level of infraction. There was no system in place for conflict resolution, nor local organizations to regulate the management of sanitation. Lastly, there were few enterprises associated with peri-urban sanitation. Social capital was moderately high, and tenants were willing to invest money into improving sanitation. The social dynamics illuminated here provide an important basis for the development of a behavioural intervention targeted towards improving urban sanitation.</jats:p