Factors influencing the intention to utilize out-of-pocket health checkup services: A sample of citizens from 12 townships of Taichung County in Taiwan.

Background: Taiwan started its National Health Insurance (NHI) system in 1995. However, until now, most cancer screening tests and preventive care have been out-of-pocket (OOP) medical items excluded from the coverage of NHI. The aim of this study was to explore the factors influencing an individual's intention to utilize OOP health checkups.