An important distinction between research/theory and EBP is that EBP accounts for the preferences of patients with respect to the type of intervention. … EBP adopts a problem solving approach based on the most reliable evidence, clinical expertise, and patient preferences to answer the question above

The predictive capacity of theory contributes to the quality of programmes by identifying the necessary elements for inclusion. Similarly this predictive capacity can serve to identify a range of possible evaluation indicators (without precluding unanticipated outcomes)

To generate nursing diagnosis. Research without theory results in discreet information or data which does not add to the accumulated knowledge of the discipline. Theory guides the research process, forms the research questions, aids in design, analysis and interpretation

Reearch is used to conduct an investigation, the results of which will add to existing evidence. Evidence-based practice, on the other hand, aims to search for and appraise best evidence, some of which will be provided by research.

Theory is a generalized concept which provides an explanation to existing things. Research is a way of expanding the existing knowledge base and creating new knowledge.