Table 1

Classification of evidence for studies of clinical outcomes of telemedicine interventions.

Study Class

Characteristic


I

• Properly designed random controlled trials


II

• Random controlled trials that contain design flaws preventing

• specification of Class I

• Properly designed trials with control groups not randomized

• Multi-center or population-based longitudinal (cohort) study

• Case control studies


III

• Descriptive studies (uncontrolled case series)

• Clinical experience

• Expert opinion

• Case reports


Hersh et al. BMC Medical Informatics and Decision Making 2001 1:5   doi:10.1186/1472-6947-1-5

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