A recent cost analysis revealed that although the cost differential between intravitreal ranibizumab and PRP may not be significant at the 2-year follow-up, over a lifetime this differential may increase significantly [ 29 ].
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Causes and Clinical Impact of Loss to Follow-Up in Patients with Proliferative Diabetic Retinopathy.
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The sentences
Duration of LTFU was a highly significant risk factor in determining the need for PPV.