Job market paper

• A structural equation model of health capability [Latest version available here]

Abstract: This paper develops a structural equation model to measure and characterize health capability. Grounded in Sen’s theory and Prah’s conceptual framework, the model concurrently estimates three dimensions of health capability: self-reported health, access to healthcare, and empowerment. They are specified as latent variables interacting into a system of structural equations using individual primary data from rural Senegal.  Sociodemographic characteristics and context-specific household and individual-level poverty measures are modelled as exogeneous factors of health capability dimensions. The findings highlight empowerment as a pivotal element of health capability, acting as a mediator between self-reported health and various socio-demographic and economic characteristics. It is through higher empowerment that gender (male), marital status (married), parenthood, seasonal migration, and higher earnings are significantly associated with better self-reported health. The model also underscores the multidimensional nature of poverty, revealing that individuals in resource-rich households exhibit lower empowerment levels, while those with greater agricultural resources and better living conditions report better health and healthcare access, respectively. Similarly, individual agricultural resources are associated with lower self-reported health, but greater access to healthcare. This model offers methodological advantages for examining complex relationships between socioeconomic determinants and health outcomes. The findings have implications for policy development, suggesting that interventions aimed at improving health outcomes should incorporate empowerment-focused strategies alongside traditional resource-based approaches to poverty reduction.

 Working paper

• Health capability profile of people living with chronic hepatitis-B virus (CHB) infection in rural Senegal: a social justice mixed methods study. Joint work with Jennifer J. Prah, Cilor Ndong and the AmBASS-PeCSEN study group (available upon request).

Work in progress

• Health capability profile and COVID-19: a comparative analysis in the US, Germany and South Korea. Joint work with Jennifer J. Prah. 

Publications

Peer-reviewed articles

• NEW! Coste M, Prah, J. J. (2025). Applying the health capability profile: an analytical study of leading causes of death in the USA and of pressing public health issues. Journal of epidemiology and community health, 79(4), 302–310. https://doi.org/10.1136/jech-2023220573 

• Coste, M., Bousmah MaQ. (2023). Predicting health services utilization using a score of perceived barriers to medical care: evidence from rural Senegal. BMC Health Services Research, 23(1), 263. https://doi.org/10.1186/s12913-023-09192-2

• Coste, M., Badji, M. A., Diallo, A., Mora, M., Boyer, S., & Prah, J. J. (2022). Applying the health capability profile to empirically study chronic hepatitis B in rural Senegal: A social justice mixed-methods study protocol. BMJ Open, 12(4), e055957. https://doi.org/10.1136/bmjopen-2021-055957 

Book & book chapter

• Coste M. Obamacare, Droit à la santé et justice sociale – Autour de la pensée de Jennifer Prah Ruger. Editions universitaires européennes, Oct. 2017, 180 p.

• Coste, M."Garantir l’équité du système de santé français face au choc démographique – Le paradigme des capabilités de santé", in Lorenzi, J-H. dir. Choc démographique, rebond économique. Descartes, 2016.

As project manager of the ANRS12356 AmBASS study (390,000€, PI: Sylvie Boyer & Aldiouma Diallo; 2017-2020), I coordinated the 4 scientific teams based in Dakar and Marseille, recruited and trained the field team of 8 interviewers and monitored data collection during the pilot and the main phase of the study, which administered at-home hepatitis B screening and socio-economic questionnaires to over 3,000 participants. I wrote the protocol paper and participated in the data analysis and scientific publications.  

I've also implemented and coordinated the PeCSen study (25,000€, PI: Sylvie Boyer; 2019-2022) which documented linkage to care among people screened for CHB during the AmBASS study. I set up data collection for monitoring visits in 3 health facilities, conducted a micro-costing study, and cooordinated a qualitative study among participants screened for CHB (n=40), and healthcare workers (n=15). 

I'm currently managing the data collection of a questionnaire among patients of the Sen-B prospective research cohort to document: (i) socio-economic resources, (ii) direct and indirect costs of CHB management, and (iii) patients reported outcomes. This data will enter an extended cost-effectiveness analysis of CHB management in centralized and decentralized settings in rural sub-Saharan Africa. 

Summary of results of the AmBASS survey: "Hépatite B: que retenir de l'étude AmBASS menée à Niakhar?"

Publications

• NEW! Coste, M., Diouf, A., Ndong, C., Diouf, A., Périères, L., Nishimwe, M. L., Bureau, M., Ndiaye, A., Maradan, G., Diallo, A., Boyer, S., & AmBASS study group (2024). Investigating linkage to care following community-based screening for hepatitis B virus in rural Senegal: A mixed methods study. Journal of viral hepatitis, 31(9), 544–556. https://doi-org/10.1111/jvh.13977   

• Coste, M., De Sèze, M., Diallo, A., Carrieri, M. P., Marcellin, F., Boyer, S., & ANRS 12356 AmBASS Study Group. (2019). Burden and impacts of chronic hepatitis B infection in rural Senegal: Study protocol of a cross-sectional survey in the area of Niakhar (AmBASS ANRS 12356). BMJ Open, 9(7), e030211. https://doi.org/10.1136/bmjopen-2019-030211 

• Djaogol, T., Coste, M., Marcellin, F., Jaquet, A., Chabrol, F., Giles-Vernick, T., Diallo, A., Carrieri, M. P., & Boyer, S. (2019). Prevention and care of hepatitis B in the rural region of Fatick in Senegal: A healthcare workers’ perspective using a mixed methods approach. BMC Health Services Research, 19(1), 627. https://doi.org/10.1186/s12913-019-4416-3 

• Périères, L., Diallo, A., Marcellin, F., Nishimwe, M. L., Ba, E. H., Coste, M., Lo, G., Halfon, P., Touré Kane, C., Maradan, G., Carrieri, P., Diouf, A., Shimakawa, Y., Sokhna, C., Boyer, S., & Group, A. 12356 A. S. S. (2022). Hepatitis B in Senegal: A Successful Infant Vaccination Program but Urgent Need to Scale Up Screening and Treatment (ANRS 12356 AmBASS survey). Hepatology Communications, 6(5), 1005–1015. https://doi.org/10.1002/hep4.1879 

• Périères, L., Marcellin, F., Lo, G., Protopopescu, C., Ba, E. H., Coste, M., Touré Kane, C., Maradan, G., Diallo, A., Sokhna, C., Boyer, S., & on behalf of the ANRS 12356 AmBASS Survey Study Group. (2021). Hepatitis B Vaccination in Senegalese Children: Coverage, Timeliness, and Sociodemographic Determinants of Non-Adherence to Immunisation Schedules (ANRS 12356 AmBASS Survey). Vaccines, 9(5), 510. https://doi.org/10.3390/vaccines9050510 

• Périères, L., Protopopescu, C., Lo, G., Marcellin, F., Ba, E. H., Coste, M., Touré Kane, C., Diallo, A., Sokhna, C., Boyer, S., & Group,  the A. 12356 A. survey S. (2021). Sibling status, home birth, tattoos and stitches are risk factors for chronic hepatitis B virus infection in Senegalese children: A cross-sectional survey. Journal of Viral Hepatitis, 28(11), 1515–1525. https://doi.org/10.1111/jvh.13589

Work in progress

• Extended cost-effectiveness analysis of CHB management in Senegal. Joint work with Sylvie Boyer and the Sen-B study group.

Access to care for people with alcohol use disorder (the ASIA study)

I conducted the statistical analysis (quantitative data) alongside Tangui Barré, and contributed to drafting both manuscripts.

Publications

• Costa, M., Barré, T., Coste, M., Yaya, I., Berenger, C., Tanti, M., Cutarella, C., Mora, M., Poloméni, P., Maynard, M., Teuma, D., Bazin, M., Maradan, G., Roux, P., & Carrieri, P. M. (2020). Screening and care for alcohol use disorder in France: Expectations, barriers and levers using a mixed-methods approach. BMC Public Health, 20(1), 1–15. https://doi.org/10.1186/s12889-020-08495-x 

• Costa, M., Marcellin, F., Coste, M., Barré, T., Nordmann, S., Mora, M., Maradan, G., Tanti, M., Cutarella, C., Casanova, D., Levy-Bellaiche, S., Polomeni, P., Simon, N., Roux, P., & Carrieri, M.-P. (2018). Access to care for people with alcohol use disorder in France: A mixed-method cross-sectional study protocol (ASIA). BMJ Open, 8(9), e024669. https://doi.org/10.1136/bmjopen-2018-024669