Although randomized control trials (RCTs) are the ‘gold standard’ to evaluate treatment effects in health care, they are frequently not practical, ethical or politically acceptable in the evaluation of many health system or public health interventions. In the absence of an RCT, evaluations often use quasi-experimental designs such as a pre-post study design with measurements before and after the intervention period, such as interupted time series (ITS). An ITS compares the intercept and slope of the regression line before the intervention with the intercept and slope after intervention. A one-time baseline effect of the intervention without influencing the secular trend can be detected as an intercept change. If the intervention changed the secular trend, there will also be a significant difference in the slope between the two periods. Use of ITS in biomedical research is described in more detail in an article published by Utz Pape and colleagues in the Journal of the Royal Society of Medicine.
NHS budgets are under considerable pressure. It is therefore unsurprising that many NHS Integrated Care Boards (ICBs) In England will aim to prioritise price in contract awards, But this approach is a significant threat to community-centred healthcare. While competitive tendering is a legally required, an excessive focus on costs in awarding NHS contracts risks overshadowing key factors such as established community trust, local expertise, and the long-term impact on continuity of care. This shift towards cheaper, often external, commercial providers threatens to cut the links between communities and their local health services. The argument that competitive tendering is solely about legal compliance, and not cost, is undermined by the very nature of such tendering, which by design encourages the lowest bid. This approach risks eroding the social fabric of local healthcare provision, where established relationships and understanding of specific community needs are essential. Establishe...
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