Anne Guichard

The concept of mechanism from a realist approach: a scoping review to facilitate its operationalization in public health program evaluation

BackgroundPublic health interventions are complex by nature, and their evaluation requires unpacking their intervention logic and their interactions with open social systems. By focusing on the interrelationships between context, mechanism, and outcome, Pawson and Tilley’s realist approach appears a promising innovation for public health-related evaluation works. However, and as expected of any methodological innovation, this approach is being constructed gradually by answering the multiple challenges to its operationalization that fall in its path. One of these challenges, users of this approach agree on, is the necessity of clarifying its key concept of mechanism.MethodWe first collected the definitions of mechanism from published works of Pawson and colleagues. Secondly, a scoping review was conducted to identify the ones quoted by users of the realist approach for evaluating public health interventions (1997–2012). We then appraised the clarity and precision of this concept against the three dimensions defined by Daigneault and Jacobs “term, sense and referent.”ResultsOf the 2344 documents identified in the scoping review, 49 documents were included. Term: Users of the realist approach use adjectives qualifying the term mechanism that were not specifically endorsed by Pawson and colleagues. Sense: None of the attributes stated by Pawson and colleagues has been listed in all of the documents analyzed, and some contributions clarified its attributes. Referent: The concept of mechanism within a realist approach can be ascribed to theory-based evaluation, complex social interventions, and critical realism.ConclusionThis review led us to reconsider the concept of mechanism within the realist approach by confronting the theoretical stance of its proponents to the practical one of its users. This resulted in a clearer, more precise definition of the concept of mechanism which may in turn trigger further improvements in the way the realist approach is applied in evaluative practice in public health and potentially beyond. A mechanism is hidden but real, is an element of reasoning and reactions of agents in regard to the resources available in a given context to bring about changes through the implementation of an intervention, and evolves within an open space-time and social system of relationships.

Social inequalities in health from Ottawa to Vancouver: action for fair equality of opportunity.

The authors set out to show that the Ottawa Charter of 1986 has not been sufficiently accepted over the past twenty years, even by those who use it as a strategic tool to guide interventions for reducing social inequalities in health. Although some public health policies do emphasize the reduction of social inequalities in health, only the Ottawa Charter appears to possess the status of an international declaration on the matter. Social inequalities in health are the systematic, avoidable, and unjust differences in health that persist between individuals and sub-groups of a population. Four examples from the field of health promotion serve to show that forgetting to combat social inequalities in health is not exclusive to the domain of public health. However, taking action against social inequalities in health does not equal tackling poverty. Moreover, intervening on the principle of equality of opportunity, on the basis of an ideology of meritocracy, or for the benefit of the population as a whole, without regard to sub-groups, only tends, at best, to reproduce inequalities. Although evidence is insufficient, there are studies that show that reducing social inequalities in health is not an aporia. Three explanations are advanced as to why social inequalities in health have been ignored by health promotion professionals. The Ottawa Charter had the merit of highlighting the struggle against social inequalities in health. Now, moving beyond the declarations, from the strategic framework provided by the Ottawa Charter and in accordance with the Bangkok Charter, it is time to show proof of voluntarism. Several priorities for the future are suggested and the International Union for Health Promotion and Education (IUHPE) should be responsible for advocating for them. (Promotion & Education, 2007, Supplement (2): pp 12-16).

Changing patterns of first injection across key periods of the French Harm Reduction Policy: PrimInject, a cross sectional analysis

BACKGROUND Monitoring of emerging modes of drug consumption in France has identified new patterns of injection among youths with diverse social backgrounds, which may explain the persistence of high rates of hepatitis C virus infection. The circumstances surrounding the first injection have been poorly documented in the group of heavy drug users and in the context of the French opioid substitution treatment (OST) policy that provides expanded access to high-dosage buprenorphine (BHD) METHODS: An Internet survey (Priminject) was conducted from October 2010 to March 2011 with French drug users. Four time periods were compared based on critical dates throughout the implementation of the Harm Reduction Policy in France. RESULTS Compared with drug users who injected for the first time prior to 1995, the aspects of drug use for users who recently injected for the first time were as follows: (1) experimentation with miscellaneous drugs before the first injection; (2) an older age at the time of first injection; (3) heroin as the drug of choice for an individuals first injection, notwithstanding the increased usage of stimulant drugs; (4) BHD did not appear to be a pathway to injection; and (5) an increased number of users who injected their first time alone, without the help or presence of another individual. CONCLUSION The PrimInject study showed that there is a group of injection drug users that is larger than the group of injection drug users observed in previous studies; therefore, it is necessary to diversify programs to reach the entire spectrum of high-risk users.

Perception de quelques mécanismes favorables à la réduction des inégalités sociales de santé en France

Résumé La promotion de la santé peine à faire la démonstration de sa capacité à réduire les inégalités sociales de santé. Cette recherche exploratoire utilise la démarche de l’évaluation réaliste pour identifier au sein de cinq actions, les mécanismes favorables à la réduction des inégalités sociales de santé en France. Des études de cas ont été effectuées à partir de cinq actions de promotion de la santé dans trois régions. Les données proviennent de 41 entrevues individuelles et de la documentation des actions. Les entrevues ont été conduites pour explorer une liste de 51 mécanismes candidats sélectionnés à partir de trois outils tirés de la littérature. L’analyse des données a été réalisée au moyen d’une analyse de contenu. Les mécanismes suivants ont été confirmés par cette étude empirique : implication de tous les partenaires clés, participation significative, valorisation des différents types d’apports et de savoirs, vision commune, leadership partagé, réflexion critique continue sur les processus et les résultats, mobilisation de ressources. Cette recherche exploratoire a permis de confirmer, par des données empiriques, l’existence de ce mécanismes spécifiques aux actions visant la réduction des inégalités sociales de santé selon le point de vue des acteurs. En même temps, elle a été en mesure de révéler de nouveaux mécanismes candidats dont l’exploration doit être poursuivie lors de nouvelles recherches. L’analyse montre cependant qu’il ne faut pas uniquement se focaliser sur les mécanismes mais aussi considérer largement le rôle des entrepreneurs politiques dans la réussite des actions. Cette recherche exploratoire montre que la démarche de l’évaluation réaliste est faisable, mais il conviendrait de la reproduire à une plus grande échelle pour accéder à l’ensemble des connaissances nécessaires à une compréhension plus exhaustive des mécanismes favorables à la réduction des inégalités sociales de santé en France.

Risk Factors Associated with Unsafe Injection Practices at the First Injection Episode among Intravenous Drug Users in France: Results from PrimInject, an Internet Survey

Background. New drug use patterns may increase the risk of human immunodeficiency virus and hepatitis infections. In France, new injection patterns among youths with diverse social backgrounds have emerged, which may explain the persistently high rates of hepatitis C virus infection. This study explores factors associated with injection risk behaviours at first injection among users who began injecting in the post-2000 era. Methods. A cross-sectional study was conducted on the Internet from October 2010 to March 2011, through an online questionnaire. Multivariate logistic regression identified the independent correlates of needle sharing and equipment (cooker/cotton filter) sharing. Results. Among the 262 respondents (mean age 25 years), 65% were male. Both risk behaviours were positively associated with initiation before 18 years of age (aOR 3.7 CI 95% 1.3–10.6 and aOR 3.0 CI 95% 1.3–7.0) and being injected by another person (aOR 3.1 CI 95% 1.0–9.9 and aOR 3.0 CI 95% 1.3–7.1). Initiation at a party was an independent correlate of equipment sharing (aOR 2.6 95% CI 1.0–6.8). Conclusions. Results suggest a need for innovative harm reduction programmes targeting a variety of settings and populations, including youths and diverse party scenes. Education of current injectors to protect both themselves and those they might initiate into injection is critically important.