General, five evidence levels are available ranging from level 1 (case studies) through to level 5 (systematic reviews and meta analyses). For example, if a clinical trial has been conducted with positive outcomes then it would likely receive a level 3 ranking — meaning that sufficient data exists to suggest that changes could be beneficial. If a review is only able to provide inconclusive results, it will be given a level 1 or 2 rating depending on the amount of information that was evaluated.
By identifying what type of research best supports proposed modifications, healthcare practitioners will be able to take more informed actions. It is important to consider new treatment options for those who are vulnerable and rely on the guidance of healthcare professionals. This will ensure that they receive the best possible care, without unnecessary risks.