European and global approaches to survey ageing populations and perspectives for joint approaches to measure age-related health outcomes

Age-related diseases and functional decline put health care systems at a challenge. It is still unclear, whether a compression or extension of morbidity or some sort of balance is likely to be expected. Probably, different scenarios may either coexist or change depending upon both the type of health outcome (particular diseases, multi-morbidity and disability) and contextual factors (socioeconomic, cultural and political). Population-based studies at the national or regional level will provide valid and comprehensive information on age-related changes in population health, as continuous health monitoring will permit analyses of time trends. Prospective studies on lifetime health trajectories are necessary to identify determinants of healthy ageing and critical phases of decline. A premise to achieve all this including cross-national comparability is to establish a consensus platform for harmonising methods, key concepts and indicators. Against this background, the 2nd European Workshop on Health and Disability Surveillance in Ageing Populations (EUWAP) held at the Robert Koch Institute (RKI) in Berlin, Germany on November 22-23, 2012, pursued two goals, (1) to take stock of existing European and global approaches for surveying ageing populations, and (2) to identify perspectives for joint future collaborations related to cross-national comparisons and the harmonisation of methods and indicators. The presentations and plenary discussions unfolded the large differences which currently still exist regarding concepts, indicators and instruments to assess healthy ageing as well as age-specific aspects of health, e.g. multi-morbidity, frailty, and disability to perform activities of daily living. In her keynote lecture, Dorly Deeg highlighted the need for a priori harmonising concepts and instruments by illustrating difficulties arising from early post-harmonisation approaches in two European projects, the EU-funded Comparison of Longitudinal European Studies on Ageing (CLESA, 2001-2004)) and more recently, the European Project on Osteoarthritis (EPOSA, 2009-2013). Large EUfunded research consortia such as the Survey of Health, Ageing and Retirement in Europe (SHARE) and the Consortium on Health and Ageing: Networks of Cohorts in Europe and the United States (CHANCES) have taken efforts to harmonise data collection. As reviewed by Simone Croezen and co-authors, SHARE results have been compared with aggregate results from large national or cross-national health surveys, such as nationwide Health Interview Surveys (HIS), the European Health Interview Survey (EHIS), the European Social Survey (ESS), the European Union Labour Force Survey (EU-LFS) and the European Union Statistics on Income and Living Conditions (EU-SILC). Comparisons of SHARE results will be extended to both, aggregate and individual-level data from other national health surveys. CHANCES has implemented a specific work package (CHANCES Health Module), in order to establish a core set of health indicators that provide comparable data between all participating cohort studies. In their presentation, Simone Croezen and Martin Bobak outlined the main concepts and methods applied. The EU-funded research consortium of Collaborative Research on Ageing in Europe (COURAGE) implemented the WHO standard to assess disability and health (ICF; International Classification of Functioning, Disability, * Correspondence: [email protected] Department of Epidemiology and Health Monitoring, Robert Koch Institute, Berlin, Germany Bode and Scheidt-Nave BMC Proceedings 2013, 7(Suppl 4):I1 http://www.biomedcentral.com/1753-6561/7/S4/I1