Katherine Kolcaba developed Comfort Theory over several years through extensive research and analysis of the concept of comfort. She defined comfort as having relief, ease, and transcendence of needs met across physical, psychospiritual, sociocultural, and environmental contexts. The theory proposes that when nursing interventions effectively meet patients' comfort needs, it leads to enhanced comfort, positive health behaviors, and improved institutional integrity. Comfort Theory has been widely adopted and tested in nursing and other health fields. It provides a useful framework for measuring and improving patient comfort.