Background: Financial barriers are a recognized major bottleneck of access and use of health services. The aim of this study was to assess effectiveness of a community based health insurance (CBHI) scheme on utilization of health services as well as on mortality and morbidity. Methods. Data were collected from April to December 2007 from the Nounas Demographic Surveillance System on overall mortality, utilization of health services, household characteristics, distance to health facilities, membership in the Nouna CBHI. We analyzed differentials in overall mortality and selected maternal health process measures between members and non-members of the insurance scheme. Results: After adjusting for covariates there was no significant difference in overall mortality between households who could not have been members (because their area was yet to be covered by the stepped-wedged scheme), non-members but whose households could have been members (areas covered but not enrolled), and members of the insurance scheme. The risk of overall mortality increased significantly with distance to health facility (35% more outside Nouna town) and with education level (37% lower when at least primary school education achieved in households). Conclusion: There was no statistically significant difference in overall mortality between members and non-members. The enrolment rates remain low, with selection bias. It is important that community based health insurances, exemptions fees policy and national health insurances be evaluated on prevention of deaths and severe morbidities instead of on drop-out rates, selection bias, adverse selection and catastrophic payments for health care only. Effective social protection will require national health insurance. © 2012 Hounton et al.; licensee BioMed Central Ltd.
The surveys and data extraction were conducted from April to December May 2007. The study site is Nouna health district (Figure 2), a remote and rural health district situated in the North West of Burkina Faso. The area is characterized by dry weather with a mean annual rainfall of about 800 mm resulting in dry savannah vegetation. In early 1990s, a Demographic Surveillance System (DSS) was established by the Nouna Health Research Centre. The original DSS area covered 39 villages (~population about 26 000 inhabitants) and has been progressively extended to cover 58 villages and Nouna town, with a population of about 72 000 people. The density of population is about 35 individuals per square km. The population is distributed in roughly 9,500 households and composed of 65% of a rural people and 35% of Nouna semi-urban town people. The population is essentially young with children less than 15 years of age representing about 48% of the total population, and only 6.2% above 60 years of age. The inhabitants are mostly subsistence farmers and/or cattle keepers. Illiteracy is extremely high, over 80%. Location of Nouna DSS, Burkina Faso (Photo credit: Dr Bocar Kouyate). The Nouna CBHI was launched in 2004 and was developed by the Nouna Health Research Centre in collaboration with the University of Heidelberg (Germany) as an operational research to study how to improve community access and uptake of health services and how to meet the need of the poor within Nouna health district. The scheme was progressively introduced since 2004 using a stepped-wedged design after almost two years of preparation. In 2004 only one third of the targeted areas was covered by the intervention, followed by another third in 2005, and the last third in 2006. The preparation phase involved structural meetings with key stakeholders, administrative clearance, several studies on barriers and facilitators of implementing such strategies, scenarios of benefit packages, valuation of health outcomes willingness-to-pay for the scheme, population revenue and affordable premium and has been extensively described elsewhere [6,17-20]. The benefit package included the minimum package of primary care services available in the district including antenatal care, laboratory exams, hospitalization fees, and transportation for emergencies. Members of the scheme are individual and families from covered health areas within the demographic surveillance system (DSS) who paid the enrolment fee (0.4 USD), and annual premium (3 USD per individual 15 years and older and 2 USD per individual less than 15 years of age). By improving perceived quality of care, by reducing out-of-pocket and by ensuring financial protection reduces the overall delay (mainly first and second), the Nouna CBHI is expected to improving utilization of quality health services and reduction of mortality and morbidity (Figure 3). Thus, we can assume if the Nouna CBHI is effective one could expect a higher utilization of health services (including but not limited to antenatal care, institutional delivery, malaria, etc.) among household members of the Nouna CBHI versus non-members. The improved utilization of health services could result in a lower mortality risk (screening, early diagnostic, access to emergency treatment) in members compared to non-members which we sought to investigate after adjusting for important determinants such as education, distance to health services and household asset ownership. Conceptual model of the Nouna community based health insurance scheme. Data were extracted from longitudinal household surveys at the Nouna Demographic Surveillance Site. The household survey sample size was 1,504 households at the time of the study, half of which were from Nouna town and the other half from surrounding villages; data were extracted on household characteristics, births, deaths and age at death, distance from village to health centers and to Nouna district hospital. In addition, a prospective survey was administered to women with experience of delivery during the last 12 months prior to the survey (April – May 2007) and data were collected on place of delivery, membership in the Nouna Community Based Health Insurance, age of the mother, anemia [21], average distance from village to health centre, and assets ownership. Anemia was selected as this morbidity has not been investigated at the time the study was designed. Descriptive statistics and regression analyses (logistic regression and Poisson regression) were performed to assess the association of overall mortality, utilization of health services, and institutional delivery by membership to the Nouna CBHI adjusting for important covariates. We used a Poisson regression with computed person-time of all deaths (person-time of years spent before death in the DSS, since the DSS started) to investigate whether there is any mortality advantage (lower mortality risk) to any sub group and by any of the selected covariates, and assess whether there is an overall lower mortality risk among members versus non-members and by selected covariates. This method was used because the distribution of deaths is probably skewed and the person-time variable consists of non-negative integers. The dependent variable was the person-time of all deaths in the Nouna DSS and membership in the Nouna CBHI, educational level, age, asset ownership, place the explanatory variables. Dummy variables were created reflect the time spent in the scheme. Study was approved by ethical review boards of Centre MURAZ and the Nouna Health Research Centre (Burkina Faso).
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