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The Tyler Medical Clinic Assisted Conception - Affordable Infertility Treatments
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The reduction in disease when a risk factor is removed. If I* is the number of people that a risk factor is responsible for and I is the total number of cases over the same period, then the etiological fraction is I*/I. Equivalently, the etiological fraction is (I-Io)/I. where Io is the number of cases in the absence of the risk factor. Also known as the Aetiological/Etiological fraction.
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