OBJECTIVES: ISPOR was founded in 1995 by a small group of dedicated volunteers and visionaries to catalyze advancing the science and practice of health economics and outcomes research(HEOR) worldwide. Ministry of Health of Turkey started the Health Transformation Program by 2002. The health economics and outcome area has been started to evolve in the last 2 decades with the positive outcomes of the program in Turkey. The study aims to analyze the trend of Turkey-based HEOR studies presented in ISPOR meetings.

METHODS: ISPOR online database was used to access poster abstracts from Turkey with using "Turkey" as the keyword. The posters which were presented between 2000-2019 are included in the analysis. The reached studies are transferred to Microsoft Excel and grouped by years, diseases, topics, and topic subcategories for conducting descriptive analysis.

RESULTS: 413 Turkey-based studies have been reached. 15.01% (62) of the studies were presented in 2015. After 2015, there was a decreasing trend in Turkey-based studies. 24.46% (101) were in the category of multiple diseases / no specific disease and 9.20% (38) in cardiovascular diseases. Most studies were conducted in multiple diseases / no specific disease categories between 2013-2018. 55.93% (231) of studies were on the topic of cost studies and 26.93% (109) in health care use and policy studies. 22.03% (91) of the studies were in the topic subcategory of cost-effectiveness analysis and 20.10% (83) in cost of illness.

CONCLUSIONS: The majority of posters based in Turkey was consist of multiple diseases / no specific disease and the cost analysis studies. The most widely used analysis method was cost-effectiveness analysis. Further analysis is needed to understand Turkey based HEOR studies.