This is an archived version. For the current version, please go to training.cochrane.org/handbook/current.

Box 5.3.a: Factors to consider when developing criteria for ‘Types of interventions’

  • What are the experimental and control (comparator) interventions of interest

  • Does the intervention have variations (e.g. dosage/intensity, mode of delivery, personnel who deliver it, frequency of delivery, duration of delivery, timing of delivery)?

  • Are all variations to be included (for example is there a critical dose below which the intervention may not be clinically appropriate)?

  • How will trials including only part of the intervention be handled?

  • How will trials including the intervention of interest combined with another intervention (co-intervention) be handled?