- Open Access
Measuring health systems strength and its impact: experiences from the African Health Initiative
BMC Health Services Researchvolume 17, Article number: 827 (2017)
Health systems are essential platforms for accessible, quality health services, and population health improvements. Global health initiatives have dramatically increased health resources; however, funding to strengthen health systems has not increased commensurately, partially due to concerns about health system complexity and evidence gaps demonstrating health outcome improvements. In 2009, the African Health Initiative of the Doris Duke Charitable Foundation began supporting Population Health Implementation and Training Partnership projects in five sub-Saharan African countries (Ghana, Mozambique, Rwanda, Tanzania, and Zambia) to catalyze significant advances in strengthening health systems. This manuscript reflects on the experience of establishing an evaluation framework to measure health systems strength, and associate measures with health outcomes, as part of this Initiative.
Using the World Health Organization’s health systems building block framework, the Partnerships present novel approaches to measure health systems building blocks and summarize data across and within building blocks to facilitate analytic procedures. Three Partnerships developed summary measures spanning the building blocks using principal component analysis (Ghana and Tanzania) or the balanced scorecard (Zambia). Other Partnerships developed summary measures to simplify multiple indicators within individual building blocks, including health information systems (Mozambique), and service delivery (Rwanda). At the end of the project intervention period, one to two key informants from each Partnership’s leadership team were asked to list – in rank order – the importance of the six building blocks in relation to their intervention.
Though there were differences across Partnerships, service delivery and information systems were reported to be the most common focus of interventions, followed by health workforce and leadership and governance. Medical products, vaccines and technologies, and health financing, were the building blocks reported to be of lower focus.
The African Health Initiative experience furthers the science of evaluation for health systems strengthening, highlighting areas for further methodological development – including the development of valid, feasible measures sensitive to interventions in multiple contexts (particularly in leadership and governance) and describing interactions across building blocks; in developing summary statistics to facilitate testing intervention effects on health systems and associations with health status; and designing appropriate analytic models for complex, multi-level open health systems.
For over a decade, there have been calls to invest in low and middle-income country health systems to ensure stable platforms are in place to maximize evidence-based health interventions through their delivery at scale [1, 2]. Underpinning the need to strengthen fragile, resource-constrained health systems is the recognition that weak health systems impede attainment of global and national targets , and are insufficiently resilient to prepare for – and respond to – crises . Despite this recognition and the rapid resource expansion from global health initiatives, investments in health systems have decreased relative to the overall funding envelope . Stagnation in resource expansion through these initiatives raises further concerns that health system investments will only decrease, with prioritization of targeted, disease-specific efforts . A lack of shared understanding of what constitutes ‘health systems strengthening,’ the potentially high cost of comprehensive health systems interventions, and a weak evidence-base linking population-level health benefits with health systems strengthening strategies undermines broad investments in this area.
To address this evidence gap and catalyze investments in health systems, the Doris Duke Charitable Foundation (DDCF) launched the African Health Initiative (AHI), which supported Population Health Implementation and Training in five diverse sub-Saharan African countries (Ghana, Mozambique, Rwanda, Tanzania and Zambia). Since 2009 (when support for Partnership implementation was initiated), these Partnerships have implemented distinct interventions designed to strengthen health systems in their respective contexts, and measured the impact of these investments on health system functioning and health outcomes [7,8,9,10,11].
To foster cross-site learning and produce results that may be generalizable to other low and middle-income countries (LMICs), DDCF instituted a Data Collaborative to work with the Partnerships to develop a conceptual evaluative framework, with core and common metrics mapping against this framework (including inputs/processes, outputs, outcomes and impact) to be gathered across Partnerships . As part of the consultative process, Partnerships used the World Health Organization’s (WHO) health systems framework (comprised of six building blocks of service delivery; health workforce; information systems; medical products, vaccines & technologies; health financing; and leadership & governance) to identify core and common metrics on project inputs, processes and outputs . Candidate core and common input, process and output metrics were reviewed and selected by the Data Collaborative and Partnerships based on 1) validity; 2) relevance and sensitivity to individual Partnership aims and processes; 3) measurement feasibility; and 4) consistency with global standards. Though Partnerships were aware of the limitations of the building blocks framework – in particular with regards to capturing interactions across blocks, and the missing element of ‘people’ – it was ultimately decided to operationalize an established framework rather than adapt or develop a framework solely for the Initiative. Note that outcome and impact indicators, as well as contextual factors, were defined by the same Data Collaborative and Partnership representatives to map against the AHI conceptual framework, though using an expanded set of reference frameworks guidance documents .
Despite guidelines recommending the use of standardized indicators – including measurement strategies to support monitoring and evaluation of health systems strengthening interventions [14, 15] – gaps remain in ensuring that measures are valid, sensitive to health systems interventions, and readily available at the administrative level that health systems strengthening efforts target [16, 17]. The state of knowledge on measuring health impacts and outcomes, however, is further advanced. For example, from the recent publication of 100 core indicators by the WHO – 77 of the measures fall into the impact (29) and outcome (48) categories, and only 22 are specific to health system strengthening (inputs and processes (12)), or proximally related to these inputs and processes (10) . Furthermore, of the ‘health system’ indicators, 42% map against the service delivery building block; 26% health financing; 12% health information; 8% health workforce; 4% medical products, vaccines and technology; and none in leadership and governance. The lack of scientifically valid metrics reflecting health systems functioning across all of the building blocks impedes efforts to monitor and evaluate interventions designed to strengthen health systems, and build an evidence-base supporting health systems strengthening to improve health outcomes.
Attempts to evaluate health systems strengthening interventions – in terms of their effects on health systems and health status – are nascent, and lack robust, standardized methodologies for assessing complex interventions implemented at a sub-national scale . Quantitative evaluations have largely focused on the impact of health systems on population health measures, including the impact of individual health system components (e.g. financing or health workforce) on health status across multiple countries [18, 19]; a partial list of health system components on health status across countries [20, 21]; or a partial list of health system components on health status over time at a national or sub-national level [22,23,24]. Published literature also includes qualitative endeavors assessing the perceived impact of health systems strengthening approaches broadly at a national level , or at the micro-level (sub-national or on individual building block components) . Though important for generating evidence on the role of health systems components as determinants of population health status, current research does not adequately capture the complex, inter-connected relationships between health system building blocks, and the setting in which they are situated . Realist evaluation  and approaches based on complexity theory  may have the advantage of addressing health systems interdependence and implementation context, though their ability to lead to generalizable knowledge on health systems strengthening interventions is unclear.
The purpose of this manuscript is to describe approaches from the five PHIT Partnerships to 1) measure health systems strength, and 2) demonstrate its impact on the delivery of health services and population health. Through surfacing common and distinct experiences from the Partnerships, we highlight the complexity in measuring health systems and its impact on health outcomes and impact, and discuss opportunities and priority areas for the future. By reporting on the Partnerships’ experience with operationalizing measures of health systems strengthening, and analytic approaches to link these inputs and processes with improved health services and population health, this article will be of interest to those engaged in designing and implementing complex interventions to improve the delivery of primary health care – including ministries of health, researchers, implementers, policymakers and funders.
Partnership approaches to strengthening health systems
By design, the five Partnerships are responsive to specific needs in their country contexts (intervention descriptions have been previously published) [7,8,9,10,11]. Though there may be commonalities in how Partnerships strengthen individual health system building blocks, describing differences in the health system focus of each Partnership clarifies reasons for the variations of measures of health system strengthening gathered across countries to best assess their respective interventions. At the end of the project intervention period, one to two key informants from each Partnership’s leadership team were asked to list – in rank order – the importance of the six building blocks in relation to their intervention (Table 1). Though there were differences across Partnerships, service delivery and information systems were reported to be the most common focus of interventions, followed by health workforce and leadership and governance. Medical products, vaccines and technologies, and health financing, were the building blocks reported to be of lower focus.
To understand differences in data availability and situate selected measures of health system strength and its impact within each project, the same key informants were requested to list – in rank order – the administrative level of the health system prioritized for Partnership interventions (Table 2). Notably, two Partnerships (Ghana and Tanzania) emphasized the community level in their intervention design; another two (Rwanda and Zambia) emphasized the health facility level; and one (Mozambique) emphasized the district level. Only one Partnership intervened at the provincial (Mozambique) and national (Rwanda) levels.
Partnership measures and data collection approaches
Because all Partnerships were asked to include under-five mortality (5q0) as the primary study outcome, and all agreed on core outcome and impact measures early in the Initiative, outcome and impact measures varied little across countries. However, given the diverse implementation settings and intervention designs, there are notable differences in Partnership measures of health system strength (Table 3) and data collection approaches (Table 4). For three building blocks (health financing; medical products, vaccines and technologies; and service delivery), there were commonalities in measures across countries, which is likely due to both more established measures that are feasible to routinely collect, as well as agreement on core metrics in these areas early in the Initiative. However, there were differences in Partnership measures across the remaining building blocks of leadership and governance, health workforce, and health information systems, reflecting the lack of established metrics (e.g. leadership and governance), differing levels of importance given Partnership interventions (e.g. health information), and different approaches of Partnerships themselves (e.g. health workforce).
All countries relied on a mix of sources for health systems data, including facility surveys, population-based surveys, internal monitoring systems, and government health management information systems (HMIS). Similarities across Partnerships included a reliance on facility surveys to populate service readiness data (including quality of care and patient satisfaction), and continuous stock of essential supplies and commodities. The frequency of facility assessments, sampling approach, and inclusion of comparison areas differed by country context, and because of the stepped wedge design, only Zambia carried out facility surveys in all intervention and comparison areas. All Partnerships noted the value of facility assessments as a principal source of health systems data; however, respondents voiced concern about the validity of the findings from facility assessments, as well as the large quantity of data that are not readily summarized for further analysis. The use of routine data was found to be efficient, and leveraged health information system improvement activities.
All countries relied on population-based surveys for outcomes and impact data, and to estimate service utilization for programs most relevant to their theory of change. Two partnerships relied on existing population-based surveys as their primary data source (e.g. Demographic and Health Surveys), which gained efficiencies, and in the case of Rwanda, was bolstered through over-sampling. Reliance on national surveys did pose challenges, however, in terms of 1) having limited flexibility in modules included in the surveys, 2) the relatively limited power of national community surveys considering sub-national (and at times sub-provincial) intervention and comparison areas, and 3) having no control over the timing of surveys. As a result, certain measures (e.g. having four or more antenatal care visits during the last pregnancy, which was not included in a Multi-Indicator Cluster Survey in Mozambique) could not be included as core to the Initiative. Mozambique is also implementing a costly endline population-based survey, as there is no national survey that includes core initiative metrics timed with the end of the intervention. Three countries (Ghana, Mozambique and Tanzania) carried out time-motion studies to quantify human resource use patterns, including wait and consult times. Partnerships highlighted the resource requirements to collect these data, and though useful in understanding staffing patterns, there were questions about the sensitivity of time-motion measures to program interventions in settings with severe personnel shortages. There were additional concerns about the consistently high level of reported patient satisfaction, which is of limited use for informing targeted action or for Partnership evaluations.
Summarizing health systems strength
Given the complexity of health systems, approaches to measure health system strength must be multi-faceted and include multiple indicators across the six building blocks, which presents a challenge in succinctly summarizing health system strength. There are two principal needs for summary measures reflecting health systems strength, including that 1) they enable rapid monitoring of health system capacity for targeted action by ministries of health, and 2) reducing the hundreds of health systems indicators into a limited set of metrics is required to quantify both the effect of interventions on health systems strength, and between health systems strength and measures of health service delivery and population health.
The five Partnerships all employed techniques to summarize health systems data, though approaches differed across countries (see Fig. 1). Using principal components analysis on national health facility surveys, two Partnerships (Ghana and Tanzania) constructed composite indices that aimed to provide robust measures of health system capabilities [30, 31]. A limitation of these data, however, is that the surveys were not carried out to the dispensary level (the level of focus in both Partnerships). A third Partnership (Zambia) adapted the WHO balanced scorecard  to summarize data from health facility surveys (implemented as part of the Partnership’s evaluation plan) into 19 measures that crossed seven health system domains [32, 33]. Efforts were made to summarize data within building blocks. In Mozambique, where improving data quality was a priority, a summary measure was developed that collapsed the dimensions of data availability and concordance using four indicators from facility reports over 12 months into one facility-level proportion [34, 35]. In Rwanda, the Partnership developed a composite measure of service quality as part of their quality improvement approach (specifically to target facility-level improvement efforts). The Rwanda Partnership also developed a micro-level composite indicator for neonatal health screening that summarized performance at the facility level for further targeted action. Only one measure collected across all countries cut across all building blocks – the total cost of health services, and the incremental contribution of each PHIT Partnership.
Approaches to associate health system strengthening with outcome and impact measures
It is beyond the scope of this article to describe the Partnerships’ analysis plans. However, given the experience of the Partnerships in designing analytic approaches to assess the effect of their complex interventions, the following section describes novel approaches used to incorporate measures of health systems strength into Partnership analytic plans. All Partnerships planned to assess 1) if the intervention is associated with improvements in population-level health status; 2) if health systems were strengthened over time in intervention areas compared with comparison areas; and 3) if health systems strengthening is associated with improvements in health service coverage and population-level health status (5q0 in all countries, though countries will also assess neonatal (NN) and infant (1q0) mortality – and in the case of Zambia and Tanzania – adult mortality). All Partnerships assessed improvements in collected measures of health systems strength by building block, though Ghana, Tanzania and Zambia planned to operationalize their summary measure of health systems strength in their analyses.
At the time of writing, Partnerships are still collecting final outcome data, or are carrying out final analyses, though initial work has generated insights into what has worked well in evaluating complex health systems interventions in the five countries, as well as challenges in this area of inquiry. Partnerships noted that a prospective, mixed methods approach is essential to understand if health systems are improving, and to unpack the middle of ‘how’ and ‘why’ interventions are or are not leading to improvements in service delivery coverage and health status. There were noted challenges, including questions on whether and how to adjust for contextual factors – including the presence of other initiatives – to enable attribution of effect to Partnership interventions. Second, Partnerships noted difficulties in teasing apart the relative contributions of different components of the health system on overall impact, given the interdependence across building blocks, and that the relative contribution of different components is likely unequal (with ‘dose’ varying by Partnership design, and over time). Inherent in this challenge is recognition that critical attributes of a health system – such as trust, resilience, quality, and leadership – are not easily quantified, and as critical for routine functioning across other building blocks, likely confound the assessment of intervention effects on individual building blocks. In addition, given the complexity of Partnership interventions, there were differences of opinions about using adaptive designs allowing for innovations based on lessons learned during implementation, versus strict adherence to the initial program design. There are no easy answers to these questions, though we expect some clarity as the field of evaluation sciences develops.
Here we present how five Partnerships supported through the Doris Duke Charitable Foundation’s African Heath Initiative approached the collection of a set of core and common metrics for health systems strengthening, and approaches to simplify and operationalize these measures to assess the effect of interventions on health system functioning and population health. Each Partnership was unique in intervention design and setting (located in five sub-Saharan African countries), but shared a list of core (shared by all Partnerships) and common (shared by multiple Partnerships) metrics that provides a solid set of experiences to learn about measuring health systems strength and its broader impact. The shared experience of the Partnerships demonstrates the difficulties in quantifying health system inputs and processes, and health system strength, due to a lack of scientifically valid measures that are sensitive to varied, complex interventions in multiple health system contexts. While some building blocks (e.g. economic inputs), outcomes and health status have established measures and data sources, others (e.g. governance and information systems) are particularly challenging. The PHIT Partnership experience provides examples of health system measures – identifying advancements in some areas, and needs for further development – and describes novel approaches to summarize health system measures for operationalization in evaluation of complex interventions. Ultimately, assessing health systems and their impact requires mixed-methods, relying on data from multiple, complementary sources.
Early in the Initiative, Partnerships agreed to use the WHO health system framework to orient the selection of core and common indicators. At the end of this Initiative, Partnerships reflected on the strengths and weaknesses of this framework. The building blocks framework was found to be useful in separating out the ingredients of health systems, and identifying key measures for these domains to enable Partnerships to document inputs and processes associated with their interventions, and quantifying the impact of these inputs and processes with outcomes and impact. However, limitations with the building blocks framework as a guide for metrics for health systems strengthening were identified. Partnerships noted that – though the framework isolated key ingredients in the health system – it did not capture the interaction between building blocks. Feedback loops (both positive and negative) between building blocks are important in the context of measuring health systems strength, given the likely interactions in intervention effects across blocks and the inability to impact building blocks in isolation (for example, improve health workforce without also improving facility conditions and/or leadership). Furthermore, the framework was found to inadequately capture implementation context – including social and organizational context. As a predominately supply-side model, the framework does not adequately capture the block of ‘people’, including community linkages, linkages with non-formal leaders, the role of the private sector, and the importance of demand creation in bridging health needs with service availability. Measuring health systems strength requires a better understanding of how health systems support community needs, and how communities contribute to health systems strengthening . Despite its limitations, the building block framework was useful to guide the complex process of identifying core and common measures of health systems strength, and could be improved upon by adapting the framework to be an open system that recognizes linkages between its components, and with the broader context in which it is situated. Alternative evaluation approaches – such as realist evaluation  and evaluations built on complexity science  – are also relevant in explicitly addressing systems complexity and context.
The experience of the five Partnerships enriches previous efforts to develop metrics for health systems strengthening by demonstrating different collection strategies, and highlighting measures that are feasible, valid and sensitive to interventions across multiple settings. Current global indicator standards [14, 36] are weighted towards outcomes and health status – and within the building blocks – towards financing input levels and health workforce numbers and their distribution, which reflects the greater availability and validity of these indicators relative to those across the other health system building blocks. There was consistency across Partnerships in terms of measures of health information, medical technologies and service delivery, collected via facility surveys that are expensive, inconsistently conducted, and in the examples presented here were not representative in multiple countries (either not reflective of the level of Partnership intervention, or did not include both intervention and comparison areas). The lack of scientifically valid and appropriate measures for the building block of ‘governance and leadership,’ (including indicators related to leadership and management at sub-national levels, beyond the existence of up-to-date national policies, that can be operationalized for analysis), has been noted elsewhere [37, 38]. This gap is especially worrisome given that leadership and governance is critical to strong, effective health systems, and likely reverberates across all other building blocks . It is a priority to develop and validate across multiple contexts new measures for leadership and governance, including how different types of evidence are used by decision makers.
All country teams developed approaches to summarize data across health system building blocks or within individual blocks (aligning with Partnership theories of change), and plan to incorporate these summary measures in final analysis. These examples provide guidance for others researching health systems, and working to operationalize summary systems measures in analytic procedures. Further work is needed to validate these summary measures of health systems strength, which is a still-forming methodologic frontier that must address metric performance given varied contexts and health system complexity . A common methodologic challenge across teams related to the primary outcome measure – 5q0 – especially in countries without a health and demographic surveillance system, where national-level community surveys do not capture these relatively rare events with sufficient precision, at meaningful time intervals, and at the district level (where Partnerships intervene). As has been described elsewhere, 5q0 may be a sub-optimal measure to evaluate complex health system interventions, as secular trends in 5q0 may hinder detection of reductions due to the interventions. Furthermore, multiple pathways to impact 5q0, and concurrent health and non-health sector inputs, may hinder attribution to specific interventions .
Ultimately, health systems are a means to an end – as delivery platforms to ensure equitable access to high quality, evidence-based health care, with the end goal of improving the health of populations. However, investments in health systems continue to be seen as overly-complex ‘black boxes’ without clear evidence on what works, and ‘black holes’ requiring substantial resource inputs (potentially at the expense of other priorities) [5, 41]. The dearth of evidence on how complex interventions improve health system functioning, and ultimately save people lives, reinforces this perception [2, 27], underscoring the need to establish a core set of validated health systems indicators across building blocks, and analytic approaches that explore interaction across the building blocks and with the outer context . Validated measures and appropriate analytic techniques are essential to continue to build a body of evidence on how to strengthen health systems, and the potential benefits on improved health service coverage and population health impact; to establish targets for health system strengthening; and ensure that substantial resource investments through global health initiatives and national budget allocations are maximized.
The African Health Initiative was launched to meaningfully strengthen health systems, and to generate evidence on effective approaches to develop health systems that lead to measurable improvements in health status. Implicit in this objective is the ability to measure stronger health systems, and associate these measures with population-level health outcomes. Measuring health system strengthening is complex, and while the WHO framework is useful, it is not sufficient to describe how the parts function as a system. Innovative approaches to develop health systems indicators, validated against health outcomes, are vital, and with the final results of the African Health Initiative, some of these indicators will be available.
African Health Initiative
Doris Duke Charitable Foundation
Health management information system
Low- and middle income- countries
Population Health Implementation and Training Partnerships
World Health Organization
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This work was supported by the African Health Initiative of the Doris Duke Charitable Foundation. Kenneth Sherr was supported by a grant from the Fogarty International Center at the US National Institutes of Health [grant number K02TW009207].
We would also like to thank the members of the AHI PHIT Partnership Collaborative for their contributions to this manuscript. Members include: Ahmed Hingora, Dominic Mboya, Amon Exavery, Kassimu Tani, Fatuma Manzi, Senga Pemba, James Phillips, Almamy Malick Kante, Kate Ramsey, Colin Baynes, John Koku Awoonor-Williams, Ayaga Bawah, Belinda Afriyie Nimako, Nicholas Kanlisi, Elizabeth F. Jackson, Mallory C. Sheff, Pearl Kyei, Patrick O. Asuming, Adriana Biney, Roma Chilengi, Helen Ayles, Moses Mwanza, Cindy Chirwa, Jeffrey Stringer, Mary Mulenga, Dennis Musatwe, Masoso Chisala, Michael Lemba, Wilbroad Mutale, Peter Drobac, Felix Cyamatare Rwabukwisi, Lisa R. Hirschhorn, Agnes Binagwaho, Neil Gupta, Fulgence Nkikabahizi, Anatole Manzi, Jeanine Condo, Didi Bertrand Farmer, Bethany Hedt-Gauthier, Kenneth Sherr, Fatima Cuembelo, Catherine Michel, Sarah Gimbel, Bradley Wagenaar, Catherine Henley, Marina Kariaganis, João Luis Manuel, Manuel Napua, and Alusio Pio.
The publication cost of this article was funded by the African Health Initiative of the Doris Duke Charitable Foundation.
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About this supplement
This article has been published as part of BMC Health Services Research Volume 17 Supplement 3, 2017: Implementation science as an essential driver for sustainable health systems strengthening interventions: Lessons learned across the five-country African Health Initiative. The full contents of the supplement are available online at https://bmchealthservres.biomedcentral.com/articles/supplements/volume-17-supplement-3.
Kenneth Sherr, PhD, MPH; Quinhas Fernandes, MD, MPH; Almamy M Kanté, PhD; Ayaga Bawah, PhD, MA; Jeanine Condo, MD, MSc, PhD; Wilbroad Mutale, PhD.
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