The extent to which theory and research were interrelated in 142 gerontologic nursing studies was examined using the Theory-Research Linkage Inventory, an instrument developed by the authors. Forty-six percent of the studies reviewed were related in varying degrees to a specific theory or model. Strengths and limitations were identified for the conceptual, empirical, and interpretive phases of the studies. However, the most problematic was the interpretive phase, where study findings and implications for practice should be linked to theory. Factors influencing the primarily unidirectional theory-research linkage are examined, and recommendations for the advancement of gerontologic nursing science are offered.