The second part of formulating the question is about the intervention you are considering. An intervention can be an action you are taking to change a situation or a medical event on which you want to study the effect.
In our first example about newly graduated registered nurses, the intervention might be baccalaureate preparation for these nurses.
In the second example about pre-term infants, the intervention is the administration of oral sucrose by your pediatric colleague for pain management.
In the third example, the intervention being considered by the team is the effect of a combined nurse and cardiovascular DVD approach on discharge teaching.
