[Epidemiology in support of intervention priorities: the case of diabetes in Turin (Piedmont Region, Northern Italy)].

Objectives: to describe the epidemiology of diabetes within the city of Turin (Piedmont Region, Northern Italy) and to present the process initiated by the city network of diabetes care for the improvement of prevention and treatment of the disease.

Design: ecological study based on administrative database.

Setting And Participants: residents in Turin from 2016 to 2018.

Main Outcome Measures: incidence and prevalence of diabetes, percentage of glycosylated haemoglobin testing, and case-fatality.

Results: in the considered three-year period (2016-2018), the cumulative incidence of diabetes was 11.5 x1,000; as of 31.12.2018 the prevalence was 5.9%. 77% had performed at least one measurement of glycated haemoglobin during the previous year, and the case-fatality was 12.6% in the three-year period. The standardized prevalence per statistical zone varied from a minimum of 2% (95%CI 1.2-3.3) to a maximum of 10.2% (95%CI 9.1-11.4). The highest values were recorded in the most deprived city areas. The geographical distribution of incidence, varying between 5.1 x1,000 (95%CI 2.7-10.0) e 19.4 x1,000 (95%CI 15.8-24.0), reproduces the geography of prevalence, as well as the percentage of measurement of glycated haemoglobin, while the variability of the fatality rate is more modest without an obvious geographic pattern.

Conclusions: diabetes occurs most frequently in the most deprived areas of the city, but the response of the health care system is adequate and equitable. Sharing of these results with the city health authorities and the diabetologists has led to identify as a priority interventions for the reduction of unhealthy behaviours, and for the improvements of patient care pathway, starting form the most disadvantaged areas of the city. A process of listening and involvement of all actors potentially interested in the prevention and treatment of diabetes has been started.