Question: If we define the cut-off point to diagnose renal failure through the Glomerular Filtering Index (GFR) as 15 ml / min instead of 60 ml / min it is increasing: 
 Options:  <1> The sensitivity of the IFG. <2> The specificity of the IFG. <3> The Positive Predictive Value of the IFG. <4> The Negative Predictive Value of the IFG. <5> The internal and external validity of the IFG.
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