"On the Margins and Not the Mainstream:" Case Selection for the Implementation of Community based Primary Health Care in Canada and New Zealand.

Healthcare system reforms are pushing beyond primary care to more holistic, integrated models of community based primary health care (CBPHC) to better meet the needs of the population. Across the world CBPHC is at varying stages of development and few standard models exist. In order to scale up and spread successful models of care it is important to study what works and why. The first step is to select 'appropriate' cases to study. In this commentary we reflect on our journey in the selection of CBPHC models for older adults, revealing the limited utility of sourcing the empirical literature; the difficulty in identifying "successful" models to study when outcomes of importance differ across stakeholders; the value of drawing on clinical and organisational networks and experts; and the association between policy context and ease of case selection. Such insights have important implications for case study methodology in health services and policy research. [ABSTRACT FROM AUTHOR]