Getting cozy with causality: Advances to the causal pathway diagramming method to enhance implementation precision

Area of Science:

• Implementation Science
• Health Services Research
• Program Evaluation

Background:

• Effective implementation strategies require careful matching to determinants and consideration of influencing factors.
• Current strategy selection methods are often imprecise or resource-intensive.
• Refinements to causal pathway diagrams (CPDs) are proposed to articulate strategy mechanisms and outcomes.

Purpose of the Study:

• To outline refinements to causal pathway diagrams (CPDs) as a method for implementation strategy selection and understanding.
• To illustrate the practical application of CPDs in implementation science.
• To enhance the theoretical and practical utility of implementation strategy selection.

Main Methods:

• CPDs are presented as a visualization tool detailing strategy, mechanisms, determinants, facilitating/impeding factors, and expected outcomes.
• Principles for constructing CPDs and their key functions are described.
• Applications of the CPD method in real-world implementation science projects are showcased.

Main Results:

• CPDs were applied to match strategies with determinants, understand strategy effectiveness conditions, and develop causal theories.
• Study teams utilized CPDs in NIH-funded Implementation Science Centers and research grants.
• The application of CPDs led to practical insights and method refinements.

Conclusions:

• CPDs provide a novel approach for selecting, understanding, and enhancing implementation strategy effectiveness.
• The method makes theoretical assumptions explicit while supporting practical planning.
• Early applications demonstrate CPDs' value and inform guidance for the field.