Health policy
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This systematic review assesses the extent to which primary-secondary substitution is possible in the field of emergency care where the range of options for the delivery of care is increasing in the UK and elsewhere. Thirty-four studies were located which met the review inclusion criteria, covering a range of interventions. This evidence suggested that broadening access to primary care and introducing user charges or other barriers to the hospital accident and emergency (A & E) department can reduce demand for expensive secondary care, although the relative cost-effectiveness of these interventions remains unclear. ⋯ Simply transferring interventions which succeed in one setting without understanding the underlying process of change is likely to result in unexpected consequences locally. Nevertheless, the review findings clearly demonstrate that shifting the balance of care is possible. It also highlights a persistent gap in professional and lay perceptions of appropriate sources of care for minor illness and injury.