Telephone versus video consultations: A systematic review of comparative effectiveness studies and guidance for choosing the most appropriate modality.

Our systematic review demonstrates equal or better, but not inferior clinical and cost outcomes for consultations delivered by VC when compared to TC. VC appear to be more clinically effective when visual information is required, when verbal communication with the patient is impaired and when patient engagement and retention is linked to clinical outcomes. We have provided conditions where VC should be used in preference to TC. These can be used by clinicians to guide the choice of telehealth modality. Cost effectiveness is also important to consider when choosing modality.