Primary Objectives1. Compare the frequency of IHM and necessity of initiation of HD between groups.2. Apply the KDIGO-2012 staging criteria and observe the differences in the distribution in strata between groups.3. Test if the rate of SCr increments to reach these adverse events is different between groups. Secondary Objectives1. Compare the differences in the results of time to nephrology consultation, length of hospital stay and dialysis dependence at discharge.