Chronic Fatigue Syndrome Diagnosis - Medical Algorithm

Are you evaluating a patient for whom chronic fatigue is a major symptom?

Yes

Did the fatigue have a definite onset?

Yes

Is the fatigue severe and disabling?

Yes

Is both physical and mental functioning affected by the fatigue?

Yes

Duration of the fatigue

months

Percent of time that fatigue has been present (enter from 0 to 100)

percent

Does the patient have a medical disorder known to cause chronic fatigue?

Yes

Does the patient have a psychiatric disorder present?

Yes

Psychiatric disorder in the patient

Oxford Research Criteria for the Diagnosis of the Chronic Fatigue Syndrome