Interrupted time series analyses on the effect on integrated care among the older population

Abstract

Abstract Background Current health and social care systems in most European countries, are highly fragmented into specialist services, and poorly designed to provide health and social care for patients with multiple health problems and social needs. As some groups of patients might have greater difficulties navigating in a fragmented and divided system than others, current system also risks increasing inequalities in access and use of health and social care services. The aim of this study is to investigate if a comprehensive integrated care system perform better than ‘standard care’ in regards to emergency department visits, hospitalization for ambulatory care sensitive conditions (ACSC), costs and re-admissions as well as increase equity in health care among older people. Methods This study is an intervention study based on a comparative interrupted time series design comparing data from Norrtälje, where an integrated care system was implemented in 2006, with other areas of Stockholm county with a standard care system. The time series consists of register data from 2000-2015, obtained from the Stockholm County Council’s administrative database of healthcare utilization and population data on socio-demographic characteristics from national registers. Preliminary results The preliminary results based on data from 2000-2011 suggest that the introduction of an integrated care system in Norrtälje did not affect the rate of hospitalization for ACSC, costs or rates of emergency department visits. When stratifying on income group we saw that the lowest income group did improve in some of the outcomes. Conclusions The integrated care system in Norrtälje seems to have no significant effect on the outcome measures included. Whether socioeconomic inequity was affected is still to be investigated further. Key messages In this study we used interrupted time series to investigate organisational changes in the health care sector. Introducing integrated care in Norrtälje seems to have little effect on register based outcome measures.