Integrative review; identifying the evidence base for policymaking and analysis in health care.

This review makes a novel contribution to the synthesis of evidence to inform the policymaking and analysis process. Findings illuminate the complexity of policymaking, the competing pressures involved and the importance of the local, national and international context. These findings have international relevance and provide empirical support for key criteria to guide those involved in context specific policymaking and/or the analysis of existing policy.