Using programme theory for evaluation of complex health interventions at district level

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In this presentation, we explain the process through which a realist evaluation could be conducted on complex interventions through the building and refining of programme theories of these …

In this presentation, we explain the process through which a realist evaluation could be conducted on complex interventions through the building and refining of programme theories of these interventions.

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  • The calls for inter-disciplinarity, implemenetation research, health systems research and role for social sciences etc are more recent formulations of earlier calls for a social action towards health. See for example Rudolf Virchow’s observations.
  • Golden era of evaluation (80s in USA) when RCTs were pushed as the gold standard for social programme evaluations too. A brief background on when RCTs could be useful. And just for fun
  • Evolution of frameworks to reflect actors and relationships (the system-software)
  • The framing used by Sheikh et al improves the accessibility of these concepts for classical biomedical research. Emphasising more on framing of questions.
  • The famous simple-complicated-complex. Emphasise on what is complicated: programmes could be merely complicated.
  • IN a district-level intervention, what is the reason for complexity. Connect to our intervention.
  • May not be an OR question. May be AND, but certainly mechanisms are important and at least Indian evaluations neglect them.
  • The Arogyashri study and Fan & Mahal’s call for GoI to commission more evaluations, but what about asking the right questions, capacity and methodological problems.
  • Discuss possible limitations of each
  • Talk about standardisation and experience with polio programme making it amenable to linear model based evaluations.
  • Not standardised, number of actors involved, based on individual behaviour change, team and institutional characteristics
  • Implementers’ assumptions
  • Identify “other determinants” especially from context. Explain for example, the role of NRHM and the aligning/disruption it could bring about.
  • Unpacking steps at individual, institutional and environmental level, keeping in mind the Kirkpatrick framework.
  • Applying the data into a framework and then looking at that with respect to the revised PT  CMO configurations

Transcript

  • 1. Using programme theory forevaluation of complex interventions Prashanth NS Faculty & PhD Scholar Institute of Public Health, Bangalore
  • 2. Outline• Background – Interventions, HS interventions and complexity – Framing evaluation questions? “Did it…”, “What..”, “Why (or why not?)..” or “How…” – Multiple paths• How to use a programme theory approach in a complex local health systems intervention
  • 3. “Medicine is a social science, and politics is nothing else but medicine on a large scale. Medicine, as a social science, as the science of human beings, has the obligation to point out problems and to attempt their theoretical solution: the politician, the practical anthropologist, must find the meansSource: Pd photo/NLM, USA for their actual solution…”
  • 4. Randomise and controlOrigins in drug testing for effectiveness – Outcomes measurable, verifiable; animal models available. Environmental conditions can be controlled. • Linearity (linear and observable transitions from inputs to outcome; environmental conditions known) • No ethical issues in setting up control • Gold-standard for effectiveness
  • 5. Hazardous journeysSmith, G. C. S., & Pell, J. P. (2003). Parachute use to prevent deathand major trauma related to gravitational challenge: systematicreview of randomised controlled trials. BMJ, 327(7429), 1459–61.doi:10.1136/bmj.327.7429.1459
  • 6. But health systems are complex… WHO AHPSR 2008
  • 7. Software neglected
  • 8. Complexity & systems-thinking• Simple, complicated and complex (Glouberman & Zimmerman) – Examples: from recipies to rockets to children• Characteristics – Multiple interacting elements (within and outside) – Organisational structure and interactions – Multiple paths/configurations to same outcome; same structural configuration but different outcome (path dependency) – Unpredictability due to feedback loops
  • 9. Complexity in health systems/interventions Institute of Public Health, Bangalore
  • 10. Medical research council guidance
  • 11. Effectiveness or Mechanism?Existing methods in publichealth research focus oneffectiveness:“Did it work? To whatextent”But, middle-level managers,decision-makers are lookingfor:“How did it work?”, “Whydid it not work for x or y?”
  • 12. The evaluation question Why did Arogyashri not benefit beneficiaries from SC/ST proportional toIdeally, evaluations their population in AP? Is there a social phenomenon operatingshould be able to here that could help us understandinform not only if a implementation of financing or other schemes in general?given interventionworked, but also how itworked, and why itworked for some (andnot for others) Fan, V. Y., & Mahal, A. (2011). Learning and getting better : Rigorous evaluation of health policy in India. National Medical Journal of India, 24(6), 325–327.
  • 13. Answering how questionsVarious methods possible(MRC guidance) – CrCT with process evaluations, stepped- wedge designs – Modeling: causal modelling, mathematical modelling, TdI, economic modelling – Natural experiments & cohort studies
  • 14. The programme theory approachA programme theory is way of representingthe expected relationship between theelements of the intervention and its expectedoutcomes. Consider the pulse polio programme
  • 15. But, for complex interventions…
  • 16. Initial programme assumptions
  • 17. Learning from general theory
  • 18. Reconstruction
  • 19. Empircise
  • 20. Applications of the PT• Theorising and understanding “how”: in parallel with RCTs (process evaluation) or preliminary to a realist evaluation (my study design)• Informing design/development of future similar programmes• Forms a basis for analysing the qualitative data and for using frameworks (Eg. Using MPF for understanding organisational performance)
  • 21. Six-step model Van Belle, S. B., Marchal, B., Dubourg, D., & Kegels, G. (2010). How to develop a theory-driven evaluation design?Lessons learned from an adolescent sexual and reproductive health programme in West Africa. BMC public health, 10, 741. doi:10.1186/1471-2458-10-741
  • 22. A mixed method RE design using PT
  • 23. Addressing complexity by understandingrelationships rather than structural outcomes Marchal et. al’s representation of Sicotte framework
  • 24. Using PT for evaluationExamining the data using theframework helps furtherrefine the PT. Allows foridentifying positive andnegative configurations ofthe context-mechanism-outcome that can beemperically verified toanswer the question“How does capacity-buildingwork in this intervention?”
  • 25. Key referencesPrashanth, N. S., Marchal, B., Hoeree, T., Devadasan, N., Macq, J., Kegels, G., & Criel, B. (2012).How does capacity building of health managers work? A realist evaluation study protocol. BMJopen, 2(2), e000882. doi:10.1136/bmjopen-2012-000882Marchal, B., Van Belle, S., Van Olmen, J., Hoeree, T., & Kegels, G. (2012). Is realist evaluationkeeping its promise? A review of published empirical studies in the field of health systemsresearch. Evaluation, 18(2), 192–212. doi:10.1177/1356389012442444Van Belle, S. B., Marchal, B., Dubourg, D., & Kegels, G. (2010). How to develop a theory-drivenevaluation design? Lessons learned from an adolescent sexual and reproductive healthprogramme in West Africa. BMC public health, 10, 741. doi:10.1186/1471-2458-10-741Craig, P., Dieppe, P., Macintyre, S., Michie, S., Nazareth, I., & Petticrew, M. (2008). Developing andevaluating complex interventions: the new Medical Research Council guidance. British MedicalJournal, 337(sep29 1), a1655–a1655. doi:10.1136/bmj.a1655Marchal, B., Dedzo, M., & Kegels, G. (2010). A realist evaluation of the management of a well-performing regional hospital in Ghana. BMC Health Services Research, 10(October 2000), 24. On Mendeley, see my reading list on critical realism and realist evaluation at: http://www.mendeley.com/groups/535071/critical-realism-and-realist-evaluation/papers/
  • 26. AcknowledgementBart Criel, Guy Kegels, Jean Macq, Bruno Marchal & Tom Hoeree at ITM, AntwerpUpendra Bhojani, Tanya Seshadri, Arima Mishra & N Devadasan for discussionsand re-discussions