Reduced work participation of working age population with health problems is a key societal concern in many Western countries, including Finland. Thus, activating people with partial work ability and keeping them in the workforce has been a common objective of many social and health policies. Scientific evaluation of the effectiveness of the policy measures has, however, been limited
This study examines the effectiveness and efficacy of partial sickness benefit and related partial sick leave on return to work, work retention and work participation in Finland when compared to regular full sick leave. Different study designs and methods were adopted to overcome the methodological challenges encountered in the study.