Another work by Katharine Kolcaba includes: Comfort theory and its application to pediatric nursing.: An article from: Pediatric Nursing Katharine Kolcaba's Contribution to Nursing Theory: Comfort Theory Kolcaba developed her nursing theory in the 1990s. It is a middle range nursing theory designed for nursing practice, research, and education. According to her theory, patient comfort exists in three forms: relief, ease, and transcendence.